10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

ý	Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
	For the quarterly period ended June 30, 2016 or
o	Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
	For the transition period from__________ to __________

Commission file number: 001-32550

WESTERN ALLIANCE BANCORPORATION

(Exact name of registrant as specified in its charter)

Delaware	88-0365922
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

One E. Washington Street Suite 1400, Phoenix, AZ	85004
(Address of principal executive offices)	(Zip Code)

(602) 389-3500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	ý	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  ý

As of July 25, 2016, Western Alliance Bancorporation had 105,072,142 shares of common stock outstanding.

INDEX

		Page
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)
	Consolidated Balance Sheets	4
	Consolidated Income Statements	5
	Consolidated Statements of Comprehensive Income	6
	Consolidated Statements of Stockholders’ Equity	7
	Consolidated Statements of Cash Flows	8
	Notes to Unaudited Consolidated Financial Statements	10
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	60
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	86
Item 4.	Controls and Procedures	88
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	89
Item 1A.	Risk Factors	89
Item 5.	Other Information	89
Item 6.	Exhibits	90
SIGNATURES		91

2

PART I

GLOSSARY OF ENTITIES AND TERMS

The acronyms and abbreviations identified below are used in various sections of this Form 10-Q, including "Management's Discussion and Analysis of Financial Condition and Results of Operations," in Item 2 and the Consolidated Financial Statements and the Notes to Unaudited Consolidated Financial Statements in Item I of this Form 10-Q.

ACRONYMS OR ABBREVIATIONS:
AAB	Alliance Association Bank	HFI	Held-for-Investment
ABA	Alliance Bank of Arizona	HFS	Held-for-Sale
AFS	Available-for-Sale	HOA	Homeowner Associations
ALCO	Asset and Liability Management Committee	HTM	Held-to-Maturity
AOCI	Accumulated Other Comprehensive Income	ICS	Insured Cash Sweep Service
ASC	Accounting Standards Codification	IRC	Internal Revenue Code
ASU	Accounting Standards Update	ISDA	International Swaps and Derivatives Association
ATM	At-the-Market	LIBOR	London Interbank Offered Rate
BOD	Board of Directors	LIHTC	Low-Income Housing Tax Credit
BON	Bank of Nevada	LVSP	Las Vegas Sunset Properties
Bridge	Bridge Bank	MBS	Mortgage-Backed Securities
CAMELS	Capital Adequacy, Assets, Management Capability, Earnings, Liquidity, Sensitivity	NBL	National Business Lines
CDARS	Certificate Deposit Account Registry Service	NOL	Net Operating Loss
CDO	Collateralized Debt Obligation	NPV	Net Present Value
CEO	Chief Executive Officer	NUBILs	Net Unrealized Built In Losses
CFO	Chief Financial Officer	OCI	Other Comprehensive Income
Company	Western Alliance Bancorporation and subsidiaries	OREO	Other Real Estate Owned
CRA	Community Reinvestment Act	OTTI	Other-than-Temporary Impairment
CRE	Commercial Real Estate	PCI	Purchased Credit Impaired
EPS	Earnings per share	PPNR	Pre-Provision Net Revenue
EVE	Economic Value of Equity	SBA	Small Business Administration
Exchange Act	Securities Exchange Act of 1934, as amended	SBIC	Small Business Investment Company
FASB	Financial Accounting Standards Board	SEC	Securities and Exchange Commission
FDIC	Federal Deposit Insurance Corporation	SERP	Supplemental Executive Retirement Plan
FHLB	Federal Home Loan Bank	SSAE	Statement on Standards for Attestation Engagements
FIB	First Independent Bank	TDR	Troubled Debt Restructuring
FRB	Federal Reserve Bank	TEB	Tax Equivalent Basis
FVO	Fair Value Option adjustment on junior subordinated debt	TPB	Torrey Pines Bank
GAAP	U.S. Generally Accepted Accounting Principles	WAB or Bank	Western Alliance Bank
GE	GE Capital US Holdings, Inc.	WAL or Parent	Western Alliance Bancorporation
GSE	Government-Sponsored Enterprise	XBRL	eXtensible Business Reporting Language
HFF	Hotel Franchise Finance

3

Item 1. Financial Statements

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	June 30, 2016			December 31, 2015
	(Unaudited)
	(in thousands, except per share amounts)
Assets:
Cash and due from banks	$	147,570		$	133,709
Interest-bearing deposits in other financial institutions	548,673			90,931
Cash and cash equivalents	696,243			224,640
Money market investments	109			122
Investment securities - measured at fair value; amortized cost of $1,240 at June 30, 2016 and $1,389 at December 31, 2015	1,326			1,481
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,165,539			1,982,523
Investment securities - HTM, at amortized cost; fair value of $41,162 at June 30, 2016 and $0 at December 31, 2015	36,929			—
Investments in restricted stock, at cost	58,682			58,111
Loans - HFS	22,336			23,809
Loans - HFI, net of deferred loan fees and costs	12,855,511			11,112,854
Less: allowance for credit losses	(122,104		)	(119,068		)
Net loans held for investment	12,733,407			10,993,786
Premises and equipment, net	120,518			118,535
Other assets acquired through foreclosure, net	49,842			43,942
Bank owned life insurance	164,283			162,458
Goodwill	289,967			289,638
Other intangible assets, net	14,322			15,716
Deferred tax assets, net	65,275			86,352
Other assets	309,989			273,976
Total assets	$	16,728,767		$	14,275,089
Liabilities:
Deposits:
Non-interest-bearing demand	$	5,275,098		$	4,093,976
Interest-bearing	8,926,259			7,936,648
Total deposits	14,201,357			12,030,624
Customer repurchase agreements	38,492			38,155
Other borrowings	—			150,000
Qualifying debt	382,103			210,328
Other liabilities	310,605			254,480
Total liabilities	14,932,557			12,683,587
Commitments and contingencies (Note 12)
Stockholders’ equity:
Common stock - par value $0.0001; 200,000,000 authorized; 106,372,182 shares issued at June 30, 2016 and 104,082,230 at December 31, 2015	10			10
Additional paid in capital	1,389,914			1,323,473
Treasury stock, at cost (1,288,353 shares at June 30, 2016 and 995,186 shares at December 31, 2015)	(25,924		)	(16,879		)
Accumulated other comprehensive income	46,626			22,260
Retained earnings	385,584			262,638
Total stockholders’ equity	1,796,210			1,591,502
Total liabilities and stockholders’ equity	$	16,728,767		$	14,275,089

See accompanying Notes to Unaudited Consolidated Financial Statements.

4

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES

CONSOLIDATED INCOME STATEMENTS (Unaudited)

	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2015			2016		2015
	(in thousands, except per share amounts)
Interest and dividend income:
Loans, including fees	$	160,015	$	105,468		$	299,801	$	205,859
Investment securities	11,456		8,003			23,482		16,516
Dividends	1,994		3,082			4,007		5,087
Other	624		65			1,055		118
Total interest income	174,089		116,618			328,345		227,580
Interest expense:
Deposits	7,678		5,362			13,921		10,508
Qualifying debt	2,514		480			4,698		920
Other borrowings	197		2,039			298		4,284
Other	14		19			31		42
Total interest expense	10,403		7,900			18,948		15,754
Net interest income	163,686		108,718			309,397		211,826
Provision for credit losses	2,500		—			5,000		700
Net interest income after provision for credit losses	161,186		108,718			304,397		211,126
Non-interest income:
Service charges and fees	4,506		3,128			8,972		6,017
Lending related income and gains (losses) on sale of loans, net	253		118			4,194		319
Card income	1,078		899			2,091		1,712
Gain (loss) on sales of investment securities, net	—		55			1,001		644
Income from bank owned life insurance	1,029		772			1,959		1,749
Other income	1,693		573			3,475		1,346
Total non-interest income	8,559		5,545			21,692		11,787
Non-interest expense:
Salaries and employee benefits	44,711		32,406			89,566		64,947
Occupancy	7,246		4,949			13,503		9,762
Data processing	5,868		2,683			10,429		5,809
Legal, professional, and directors' fees	5,747		4,611			11,319		8,606
Insurance	2,963		2,274			6,286		4,364
Marketing	1,097		463			1,754		840
Loan and repossessed asset expenses	832		1,284			1,734		2,374
Card expense	824		613			1,711		1,087
Intangible amortization	697		281			1,394		562
Net loss (gain) on sales / valuations of repossessed and other assets	357		(1,218		)	55		(1,569		)
Acquisition / restructure expense	3,662		7,842			3,662		8,001
Other expense	7,800		5,021			15,884		10,459
Total non-interest expense	81,804		61,209			157,297		115,242
Income before provision for income taxes	87,941		53,054			168,792		107,671
Income tax expense	26,327		13,579			45,846		27,813
Net income	61,614		39,475			122,946		79,858
Dividends on preferred stock	—		247			—		423
Net income available to common stockholders	$	61,614	$	39,228		$	122,946	$	79,435
Earnings per share available to common stockholders:
Basic	0.60		0.44			1.20		0.90
Diluted	0.60		0.44			1.19		0.90
Weighted average number of common shares outstanding:
Basic	102,688		88,177			102,294		88,059
Diluted	103,472		88,682			103,007		88,567
Dividends declared per common share	$	—	$	—		$	—	$	—

See accompanying Notes to Unaudited Consolidated Financial Statements.

5

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)

	Three Months Ended June 30,					Six Months Ended June 30, 2016
	2016		2015			2016			2015
	(in thousands)
Net income	$	61,614	$	39,475		$	122,946		$	79,858
Other comprehensive income (loss), net:
Unrealized gain (loss) on AFS securities, net of tax effect of $(8,008), $5,135, $(12,508) and $858, respectively	12,712		(8,378		)	23,731			(1,225		)
Unrealized gain (loss) on SERP, net of tax effect of $(4), $(207), $(6) and $(207), respectively	6		337			12			337
Unrealized gain (loss) on junior subordinated debt, net of tax effect of $(431), $2,980, $(884) and $3,095, respectively	575		(4,756		)	1,334			(4,950		)
Realized (gain) loss on sale of AFS securities included in income, net of tax effect of $0, $21, $290 and $241, respectively	—		(34		)	(711		)	(403		)
Net other comprehensive income (loss)	13,293		(12,831		)	24,366			(6,241		)
Comprehensive income	$	74,907	$	26,644		$	147,312		$	73,617

See accompanying Notes to Unaudited Consolidated Financial Statements.

6

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited)

	Preferred Stock			Common Stock Outstanding				Additional Paid in Capital		Treasury Stock			Accumulated Other Comprehensive Income			Retained Earnings			Total Stockholders’ Equity
	Shares	Amount		Shares		Amount
	(all amounts in thousands)
Balance, January 1, 2015 (1)	71	$	70,500	88,691		$	9	$	837,603	$	(9,276	)	$	32,948		$	69,144		$	1,000,928
Net income	—	—		—		—		—		—			—			79,858			79,858
Exercise of stock options	—	—		145		—		1,537		—			—			—			1,537
Restricted stock, performance stock units, and other grants, net	—	—		713		—		15,000		—			—			—			15,000
Restricted stock surrendered	—	—		(255	)	—		—		(6,947		)	—			—			(6,947		)
Issuance of common stock in connection with the acquisition of Bridge (2)	—	—		12,997		1		431,030		—			—			—			431,031
Dividends on preferred stock	—	—		—		—		—		—			—			(423		)	(423		)
Other comprehensive (loss), net	—	—		—		—		—		—			(6,241		)	—			(6,241		)
Balance, June 30, 2015	71	$	70,500	102,291		$	10	$	1,285,170	$	(16,223	)	$	26,707		$	148,579		$	1,514,743
Balance, December 31, 2015	—	$	—	103,087		$	10	$	1,323,473	$	(16,879	)	$	22,260		$	262,638		$	1,591,502
Net income	—	—		—		—		—		—			—			122,946			122,946
Exercise of stock options	—	—		53		—		519		—			—			—			519
Restricted stock, performance stock units, and other grants, net	—	—		687		—		10,137		—			—			—			10,137
Restricted stock surrendered	—	—		(293	)	—		—		(9,045		)	—			—			(9,045		)
Issuance of common stock under ATM offering, net of offering costs	—	—		1,550		—		55,785		—			—			—			55,785
Other comprehensive income, net	—	—		—		—		—		—			24,366			—			24,366
Balance, June 30, 2016	—	$	—	105,084		$	10	$	1,389,914	$	(25,924	)	$	46,626		$	385,584		$	1,796,210

(1) As adjusted, see Treasury Shares section in "Note 1. Summary of Significant Accounting Policies" for further discussion.

(2) Includes value of certain share-based awards replaced in connection with the acquisition.

See accompanying Notes to Unaudited Consolidated Financial Statements.

7

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

	Six Months Ended June 30,
	2016			2015
	(in thousands)
Cash flows from operating activities:
Net income	$	122,946		$	79,858
Adjustments to reconcile net income to cash provided by operating activities:
Provision for credit losses	5,000			700
Depreciation and amortization	6,136			3,943
Stock-based compensation	10,317			7,908
Excess tax benefit of stock-based compensation	(3,899		)	(5,164		)
Deferred income taxes	5,173			(2,345		)
Amortization of net premiums for investment securities	6,229			4,133
Accretion and amortization of fair market value adjustments on loans acquired from business combinations	(13,485		)	(4,118		)
Accretion and amortization of fair market value adjustments on other assets and liabilities acquired from business combinations, net	1,549			247
Income from bank owned life insurance	(1,959		)	(1,749		)
(Gains) / Losses on:
Sales of investment securities	(1,001		)	(644		)
Sale of loans	(2,213		)	(319		)
Extinguishment of debt	—			81
Other assets acquired through foreclosure, net	329			(3,055		)
Valuation adjustments of other repossessed assets, net	(311		)	1,504
Sale of premises, equipment, and other assets, net	37			(18		)
Changes in:
Other assets	(2,892		)	11,946
Other liabilities	(16,819		)	(3,844		)
Net cash provided by operating activities	115,137			89,064
Cash flows from investing activities:
Investment securities - measured at fair value
Principal pay downs and maturities	150			143
Investment securities - AFS
Purchases	(361,195		)	(94,532		)
Principal pay downs and maturities	176,410			114,127
Proceeds from sales	34,304			78,040
Investment securities - HTM
Purchases	(37,030		)	—
Principal pay downs and maturities	25			—
Purchase of investment tax credits	(17,773		)	(11,884		)
Sale (purchase) of money market investments, net	12			(424		)
(Purchase) liquidation of restricted stock	(571		)	(18,749		)
Loan fundings and principal collections, net	(401,692		)	(515,143		)
Purchase of premises, equipment, and other assets, net	(6,592		)	(3,886		)
Proceeds from sale of other real estate owned and repossessed assets, net	4,808			14,375
Cash and cash equivalents (used) acquired in acquisitions, net	(1,272,187		)	342,427
Net cash used in investing activities	(1,881,331		)	(95,506		)

8

	Six Months Ended June 30,
	2016			2015
	(in thousands)
Cash flows from financing activities:
Net increase (decrease) in deposits	$	2,170,733		$	733,788
Proceeds from issuance of subordinated debt	169,470			148,450
Net (decrease) increase in borrowings	(149,665		)	(276,023		)
Proceeds from exercise of common stock options	519			1,537
Cash paid for tax withholding on vested restricted stock	(9,045		)	(6,947		)
Cash dividends paid on preferred stock	—			(423		)
Proceeds from issuance of stock in offerings, net	55,785			—
Net cash provided by financing activities	2,237,797			600,382
Net increase in cash and cash equivalents	471,603			593,940
Cash and cash equivalents at beginning of period	224,640			164,396
Cash and cash equivalents at end of period	$	696,243		$	758,336
Supplemental disclosure:
Cash paid during the period for:
Interest	$	18,206		$	13,881
Income tax payments	27,176			25,801
Non-cash investing and financing activity:
Transfers to other assets acquired through foreclosure, net	10,726			13,459
Change in unfunded investment tax credits and SBIC commitments	27,000			2,168
Non-cash assets acquired in acquisition	1,284,557			1,590,927
Non-cash liabilities acquired in acquisition	12,559			1,761,951
Change in unrealized gain (loss) on AFS securities, net of tax	23,019			(1,628		)
Change in unrealized gain (loss) on TRUP securities, net of tax	1,334			(4,950		)
Change in unfunded obligations	(12,966		)	13,654

See accompanying Notes to Unaudited Consolidated Financial Statements.

9

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of operation

WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of deposit, lending, treasury management, and online banking products and services through its wholly-owned banking subsidiary, WAB.

WAB operates the following full-service banking divisions: ABA in Arizona, BON and FIB in Nevada, Bridge in Northern California, and TPB in Southern California. The Company also serves business customers through a national platform of specialized financial services including AAB, Corporate Finance, Equity Fund Resources, HFF, Life Sciences Group, Mortgage Warehouse Lending, Public and Nonprofit Finance, Renewable Resource Group, Resort Finance, and Technology Finance. In addition, the Company has one non-bank subsidiary, LVSP, which holds and manages certain non-performing loans and OREO.

Basis of presentation

The accounting and reporting policies of the Company are in accordance with GAAP and conform to practices within the financial services industry. The accounts of the Company and its consolidated subsidiaries are included in the Unaudited Consolidated Financial Statements.

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management evaluates these estimates and judgments on an ongoing basis and bases its estimates on experience, current and expected future conditions, third-party evaluations and various other assumptions that management believes are reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from those estimates and assumptions used in the Unaudited Consolidated Financial Statements and related notes. Material estimates that are particularly susceptible to significant changes in the near term relate to the determination of the allowance for credit losses; estimated cash flows related to PCI loans; fair value determinations related to acquisitions and other assets and liabilities carried at fair value; and accounting for income taxes.

Principles of consolidation

As of June 30, 2016, WAL has ten wholly-owned subsidiaries: WAB, LVSP, and eight unconsolidated subsidiaries used as business trusts in connection with the issuance of trust-preferred securities.

The Bank has the following significant wholly-owned subsidiaries: WAB Investments, Inc., BON Investments, Inc., and TPB Investments, Inc., which hold certain investment securities, municipal and nonprofit loans, and leases; and BW Real Estate, Inc., which operates as a real estate investment trust and holds certain of WAB's real estate loans and related securities.

The Company does not have any other significant entities that should be considered for consolidation. All significant intercompany balances and transactions have been eliminated in consolidation.

Reclassifications

Certain amounts in the Consolidated Financial Statements as of December 31, 2015 and for the three and six months endedJune 30, 2015 have been reclassified to conform to the current presentation. The reclassifications have no effect on net income or stockholders’ equity as previously reported.

10

Interim financial information

The accompanying Unaudited Consolidated Financial Statements as of and for the three and six months endedJune 30, 2016 and 2015 have been prepared in condensed format and, therefore, do not include all of the information and footnotes required by GAAP for complete financial statements. These statements have been prepared on a basis that is substantially consistent with the accounting principles applied to the Company's audited Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

The information furnished in these interim statements reflects all adjustments which are, in the opinion of management, necessary for a fair statement of the results for each respective period presented. Such adjustments are of a normal, recurring nature. The results of operations in the interim statements are not necessarily indicative of the results that may be expected for any other quarter or for the full year. The interim financial information should be read in conjunction with the Company's audited Consolidated Financial Statements

Business combinations

Business combinations are accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations. Under the acquisition method, the acquiring entity in a business combination recognizes all of the acquired assets and assumed liabilities at their estimated fair values as of the date of acquisition. Any excess of the purchase price over the fair value of net assets and other identifiable intangible assets acquired is recorded as goodwill. To the extent the fair value of net assets acquired, including identified intangible assets, exceeds the purchase price, a bargain purchase gain is recognized. Changes to estimated fair values from a business combination are recognized as an adjustment to goodwill during the measurement period and are recognized in the reporting period in which the adjustment amounts are determined. Results of operations of an acquired business are included in the Consolidated Income Statement from the date of acquisition. Acquisition-related costs, including conversion and restructuring charges, are expensed as incurred.

Investment securities

Investment securities may be classified as HTM, AFS, or measured at fair value. The appropriate classification is initially decided at the time of purchase. Securities classified as HTM are those debt securities that the Company has both the intent and ability to hold to maturity regardless of changes in market conditions, liquidity needs, or general economic conditions. These securities are carried at amortized cost. The sale of a security within three months of its maturity date or after the majority of the principal outstanding has been collected is considered a maturity for purposes of classification and disclosure.

In May 2014, management reassessed its intent to hold certain CDOs classified as HTM, which necessitated a reclassification of all of the Company's HTM securities to AFS at the date of the transfer. As an extended period of time has passed since this reclassification was made, management believes that the Company is again able to assert as of March 31, 2016 that it has both the intent and ability to hold certain securities classified as HTM to maturity. See "Note 2. Investment Securities" of these Notes to Unaudited Consolidated Financial Statements for additional detail related to HTM securities.

Securities classified as AFS or trading securities measured at fair value are reported as an asset in the Consolidated Balance Sheet at their estimated fair value. As the fair value of AFS securities changes, the changes are reported net of income tax as an element of OCI, except for other-than-temporarily-impaired securities. When AFS securities are sold, the unrealized gain or loss is reclassified from OCI to non-interest income. The changes in the fair values of trading securities are reported in non-interest income. Securities classified as AFS are both equity and debt securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity. Any decision to sell a security classified as AFS would be based on various factors, including significant movements in interest rates, changes in the maturity mix of the Company’s assets and liabilities, liquidity needs, decline in credit quality, and regulatory capital considerations.

Interest income is recognized based on the coupon rate and increased by accretion of discounts earned or decreased by the amortization of premiums paid over the contractual life of the security, adjusted for prepayment estimates, using the interest method.

In estimating whether there are any OTTI losses, management considers the 1) length of time and the extent to which the fair value has been less than amortized cost; 2) financial condition and near term prospects of the issuer; 3) impact of changes in market interest rates; and 4) intent and ability of the Company to retain its investment for a period of time sufficient to allow for any anticipated recovery in fair value and whether it is not more likely than not the Company would be required to sell the security.

Declines in the fair value of individual AFS debt securities that are deemed to be other-than-temporary are reflected in earnings when identified. The fair value of the debt security then becomes the new cost basis. For individual debt securities where the

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Company does not intend to sell the security and it is not more likely than not that the Company will be required to sell the security before recovery of its amortized cost basis, the other-than-temporary decline in fair value of the debt security related to 1) credit loss is recognized in earnings; and 2) interest rate, market, or other factors is recognized in other comprehensive income or loss.

For individual debt securities where the Company either intends to sell the security or more likely than not will not recover all of its amortized cost, the OTTI is recognized in earnings equal to the entire difference between the security's cost basis and its fair value at the balance sheet date. For individual debt securities for which a credit loss has been recognized in earnings, interest accruals and amortization and accretion of premiums and discounts are suspended when the credit loss is recognized. Interest received after accruals have been suspended is recognized on a cash basis.

Restricted stock

On January 30, 2015, WAB became a member of the Federal Reserve System and, as part of its membership, is required to maintain stock in the FRB in a specified ratio to its capital. In addition, WAB is a member of the FHLB system and, accordingly, maintains an investment in capital stock of the FHLB based on the borrowing capacity used. The Bank also maintains an investment in its primary correspondent bank. All of these investments are considered equity securities with no actively traded market. Therefore, the shares are considered restricted investment securities. These investments are carried at cost, which is equal to the value at which they may be redeemed. The dividend income received from the stock is reported in interest income. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists. No impairment has been recorded to date.

Loans, held for sale

Loans, held for sale consist primarily of SBA and CRE loans that the Company originates (or acquires) and intends to sell. These loans are carried at the lower of aggregate cost or fair value. Fair value is determined based on available market data for similar assets, expected cash flows, and appraisals of underlying collateral or the credit quality of the borrower. Gains and losses on the sale of loans are recognized pursuant to ASC 860, Transfers and Servicing. Interest income of these loans is accrued daily and loan origination fees and costs are deferred and included in the cost basis of the loan. The Company issues various representations and warranties associated with these loan sales. The Company has not experienced any losses as a result of these representations and warranties.

Loans, held for investment

The Company generally holds loans for investment and has the intent and ability to hold loans until their maturity. Therefore, they are reported at book value. Net loans are stated at the amount of unpaid principal, adjusted for net deferred fees and costs, purchase accounting fair value adjustments, and an allowance for credit losses. In addition, the book value of loans that are subject to a fair value hedge is adjusted for changes in value attributable to the effective portion of the hedged benchmark interest rate risk.

The Company may also acquire loans through a business combination. These acquired loans are recorded at estimated fair value on the date of purchase, which is comprised of unpaid principal adjusted for estimated credit losses and interest rate fair value adjustments. Loans are evaluated individually to determine if there has been credit deterioration since origination. Such loans may then be aggregated and accounted for as a pool of loans based on common characteristics. When the Company acquires such loans, the yield that may be accreted (accretable yield) is limited to the excess of the Company’s estimate of undiscounted cash flows expected to be collected over the Company’s initial investment in the loan. The excess of contractual cash flows over the cash flows expected to be collected may not be recognized as an adjustment to yield, loss, or a valuation allowance. Subsequent increases in cash flows expected to be collected generally are recognized prospectively through adjustment of the loan’s yield over the remaining life. Subsequent decreases to cash flows expected to be collected are recognized as impairment. The Company may not carry over or create a valuation allowance in the initial accounting for loans acquired under these circumstances. For purchased loans that are not deemed impaired, fair value adjustments attributable to both credit and interest rates are accreted (or amortized) over the contractual life of the individual loan. For additional information, see "Note 3. Loans, Leases and Allowance for Credit Losses" of these Notes to Unaudited Consolidated Financial Statements.

Loan fees collected for the origination of loans less direct loan origination costs (net deferred loan fees) are amortized over the contractual life of the loan through interest income. If the loan has scheduled payments, the amortization of the net deferred loan fee is calculated using the interest method over the contractual life of the loan. If the loan does not have scheduled payments, such as a line of credit, the net deferred loan fee is recognized as interest income on a straight-line basis over the contractual life of the loan commitment. Commitment fees based on a percentage of a customer’s unused line of credit and fees

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related to standby letters of credit are recognized over the commitment period. When loans are repaid, any remaining unamortized balances of premiums, discounts, or net deferred fees are recognized as interest income.

Non-accrual loans: For all loan types except credit cards, when a borrower discontinues making payments as contractually required by the note, the Company must determine whether it is appropriate to continue to accrue interest. The Company ceases accruing interest income when the loan has become delinquent by more than 90 days or when management determines that the full repayment of principal and collection of interest according to contractual terms is no longer likely. The Company may decide to continue to accrue interest on certain loans more than 90 days delinquent if the loans are well secured by collateral and in the process of collection. Credit card loans and other personal loans are typically charged off no later than 180 days delinquent.

For all loan types, when a loan is placed on non-accrual status, all interest accrued but uncollected is reversed against interest income in the period in which the status is changed and, the Company makes a loan-level decision to apply either the cash basis or cost recovery method. The Company recognizes income on a cash basis only for those non-accrual loans for which the collection of the remaining principal balance is not in doubt. Under the cost recovery method, subsequent payments received from the customer are applied to principal and generally no further interest income is recognized until the principal has been paid in full or until circumstances have changed such that payments are again consistently received as contractually required.

Impaired loans: A loan is identified as impaired when it is no longer probable that interest and principal will be collected according to the contractual terms of the original loan agreement. Generally, impaired loans are classified as non-accrual. However, in certain instances, impaired loans may continue on an accrual basis, if full repayment of all principal and interest is expected and the loan is both well secured and in the process of collection. Impaired loans are measured for reserve requirements in accordance with ASC 310, Receivables, based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral less applicable disposition costs if the loan is collateral dependent. The amount of an impairment reserve, if any, and any subsequent changes are recorded as a provision for credit losses. Losses are recorded as a charge-off when losses are confirmed. In addition to management's internal loan review process, regulators may from time to time direct the Company to modify loan grades, loan impairment calculations, or loan impairment methodology.

Troubled Debt Restructured Loans: A TDR loan is a loan on which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in the accrued interest, or deferral of interest payments. A TDR loan is also considered impaired. A TDR loan may be returned to accrual status when the loan is brought current, has performed in accordance with the contractual restructured terms for a reasonable period of time (generally six months) and the ultimate collectability of the total contractual restructured principal and interest is no longer in doubt. However, such loans continue to be considered impaired. Consistent with regulatory guidance, a TDR loan that is subsequently modified in another restructuring agreement but has shown sustained performance and classification as a TDR, will be removed from TDR status provided that the modified terms were market-based at the time of modification.

Allowance for credit losses

Credit risk is inherent in the business of extending loans and leases to borrowers, for which the Company must maintain an adequate allowance for credit losses. The allowance for credit losses is established through a provision for credit losses recorded to expense. Loans are charged against the allowance for credit losses when management believes that the contractual principal or interest will not be collected. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount believed adequate to absorb estimated probable losses on existing loans that may become uncollectable, based on evaluation of the collectability of loans and prior credit loss experience, together with other factors. The Company formally re-evaluates and establishes the appropriate level of the allowance for credit losses on a quarterly basis.

The allowance consists of specific and general components. The specific allowance applies to impaired loans. For impaired collateral dependent loans, the reserve is calculated based on the collateral value, net of estimated disposition costs. Generally, the Company obtains independent collateral valuation analysis for each loan every twelve months. Loans not collateral dependent are evaluated based on the expected future cash flows discounted at the original contractual interest rate.

The general allowance covers all non-impaired loans and is based on historical loss experience adjusted for various qualitative and quantitative factors listed below.

The Company’s allowance for credit loss methodology incorporates several quantitative and qualitative risk factors used to establish the appropriate allowance for credit losses at each reporting date. Quantitative factors include: 1) the Company's

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historical loss experience; 2) levels of and trends in delinquencies and impaired loans; 3) levels of and trends in charge-offs and recoveries; 4) trends in volume and terms of loans; 5) changes in underwriting standards or lending policies; 6) experience, ability, depth of lending staff; 7) national and local economic trends and conditions; 8) changes in credit concentrations; 9) out-of-market exposures; 10) changes in quality of loan review system; and 11) changes in the value of underlying collateral.

An internal ten-year loss history is also incorporated into the allowance calculation model. Due to the credit concentration of the Company's loan portfolio in real estate secured loans, the value of collateral is heavily dependent on real estate values in Nevada, Arizona, and California. While management uses the best information available to make its evaluation, future adjustments to the allowance may be necessary if there are significant changes in economic or other conditions. In addition, regulators, as an integral part of their examination processes, periodically review the Bank's allowance for credit losses, and may require the Bank to make additions to the allowance based on their judgment about information available to them at the time of their examination. Management regularly reviews the assumptions and formulae used in determining the allowance and makes adjustments if required to reflect the current risk profile of the portfolio.

Other assets acquired through foreclosure

Other assets acquired through foreclosure consist primarily of properties acquired as a result of, or in-lieu-of, foreclosure. Properties or other assets (primarily repossessed assets formerly leased) are classified as OREO and other repossessed property and are initially reported at fair value of the asset less estimated selling costs. Subsequent adjustments are based on the lower of carrying value or fair value less estimated costs to sell the property. Costs related to the development or improvement of the assets are capitalized and costs related to holding the assets are charged to non-interest expense. Property is evaluated regularly to ensure the recorded amount is supported by its current fair value and valuation allowances.

Goodwill and other intangible assets

The Company records as goodwill the excess of the purchase price over the fair value of the identifiable net assets acquired in accordance with applicable guidance. The Company performs its annual goodwill and intangibles impairment tests as of October 1 each year, or more often if events or circumstances indicate that the carrying value may not be recoverable. During the three and six months endedJune 30, 2016 and 2015, there were no events or circumstances that indicated that an interim impairment test of goodwill or other intangible assets was necessary.

Treasury Shares

Effective January 1, 2016, the Company has separately presented treasury shares, which represents shares surrendered to the Company equal in value to the statutory payroll tax withholding obligations arising from the vesting of employee restricted stock awards. Prior period amounts have been adjusted to reflect this new presentation, with no change in total stockholders' equity. The Company carries treasury shares at cost.

Derivative financial instruments

The Company uses interest-rate swaps to mitigate interest-rate risk associated with changes to 1) the fair value of certain fixed-rate financial instruments (fair value hedges) and 2) certain cash flows related to future interest payments on variable rate financial instruments (cash flow hedges).

The Company recognizes derivatives as assets or liabilities in the Consolidated Balance Sheet at their fair value in accordance with ASC 815, Derivatives and Hedging. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship. On the date the derivative contract is entered into, the Company designates the derivative as a fair value hedge or cash flow hedge. Derivative instruments designated in a hedge relationship to mitigate exposure to changes in the fair value of an asset or liability attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivative instruments designated in a hedge relationship to mitigate exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.

Changes in the fair value of a derivative that is designated and qualifies as a fair value hedge, along with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk are recorded in current-period earnings. For a cash flow hedge, the effective portion of the change in the fair value of the derivative is recorded in AOCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Any ineffective portion of the change in fair value of a cash flow hedge is recognized immediately in non-interest income in the Consolidated Income Statement. Under both the fair value and cash flow hedge scenarios, changes in the fair value of derivatives not considered to be highly effective in hedging the change in fair value or the expected cash flows of the hedged item are recognized in earnings as non-interest income during the period of the change.

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The Company documents its hedge relationships, including identification of the hedging instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction at the time the derivative contract is executed. Both at inception and at least quarterly thereafter, the Company assesses whether the derivatives used in hedging transactions are highly effective (as defined in the guidance) in offsetting changes in either the fair value or cash flows of the hedged item. Retroactive effectiveness is assessed, as well as the continued expectation that the hedge will remain effective prospectively. The Company discontinues hedge accounting prospectively when it is determined that a hedge is no longer highly effective. When hedge accounting is discontinued on a fair value hedge that no longer qualifies as an effective hedge, the derivative continues to be reported at fair value in the Consolidated Balance Sheet, but the carrying amount of the hedged item is no longer adjusted for future changes in fair value. The adjustment to the carrying amount of the hedged item that existed at the date hedge accounting is discontinued is amortized over the remaining life of the hedged item into earnings.

Derivative instruments that are not designated as hedges, so called free-standing derivatives, are reported in the Consolidated Balance Sheet at fair value and the changes in fair value are recognized in earnings as non-interest income during the period of change.

The Company may in the normal course of business purchase a financial instrument or originate a loan that contains an embedded derivative instrument. Upon purchasing the instrument or originating the loan, the Company assesses whether the economic characteristics of the embedded derivative are clearly and closely related to the economic characteristics of the remaining component of the financial instrument (i.e., the host contract) and whether a separate instrument with the same terms as the embedded instrument would meet the definition of a derivative instrument. When it is determined that the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is separated from the host contract and carried at fair value. However, in cases where the host contract is measured at fair value, with changes in fair value reported in current earnings, or the Company is unable to reliably identify and measure an embedded derivative for separation from its host contract, the entire contract is carried in the Consolidated Balance Sheet at fair value and is not designated as a hedging instrument.

Income taxes

The Company is subject to income taxes in the United States and files a consolidated federal income tax return with all of its subsidiaries, with the exception of BW Real Estate, Inc. Deferred income taxes are recorded to reflect the effects of temporary differences between the financial reporting carrying amounts of assets and liabilities and their income tax bases using enacted tax rates that are expected to be in effect when the taxes are actually paid or recovered. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.

Net deferred tax assets are recorded to the extent that these assets will more-likely-than-not be realized. In making these determinations, all available positive and negative evidence is considered, including scheduled reversals of deferred tax liabilities, tax planning strategies, projected future taxable income, and recent operating results. If it is determined that deferred income tax assets to be realized in the future are in excess of their net recorded amount, an adjustment to the valuation allowance will be recorded, which will reduce the Company's provision for income taxes.

A tax benefit from an unrecognized tax benefit may be recognized when it is more-likely-than-not that the position will be sustained upon examination, including related appeals or litigation, based on technical merits. Income tax benefits must meet a more-likely-than-not recognition threshold at the effective date to be recognized.

Interest and penalties related to unrecognized tax benefits are recognized as part of the provision for income taxes in the Consolidated Income Statement. Accrued interest and penalties are included in the related tax liability line with other liabilities in the Consolidated Balance Sheet.

Off-balance sheet instruments

In the ordinary course of business, the Company has entered into off-balance sheet financial instrument arrangements consisting of commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the Consolidated Financial Statements when they are funded. They involve, to varying degrees, elements of credit risk in excess of amounts recognized in the Consolidated Balance Sheet. Losses would be experienced when the Company is contractually obligated to make a payment under these instruments and must seek repayment from the borrower, which may not be as financially sound in the current period as they were when the commitment was originally made. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do

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not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral.

As with outstanding loans, the Company applies qualitative factors and utilization rates to its off-balance sheet obligations in determining an estimate of losses inherent in these contractual obligations. The estimate for credit losses on off-balance sheet instruments is included in other liabilities and the charge to income that establishes this liability is included in non-interest expense.

The Company also has off-balance sheet arrangements related to its derivative instruments. Derivative instruments are recognized in the Consolidated Financial Statements at fair value and their notional values are carried off-balance sheet. See "Note 9. Derivatives and Hedging Activities" of these Notes to Unaudited Consolidated Finance Statements for further discussion.

Fair values of financial instruments

The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities. ASC 820, Fair Value Measurement, establishes a framework for measuring fair value and a three-level valuation hierarchy for disclosure of fair value measurement as well as enhances disclosure requirements for fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The Company uses various valuation approaches, including market, income, and/or cost approaches. ASC 820 establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would consider in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the reliability of inputs, as follows:

• Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

• Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market.

• Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques.

The availability of observable inputs varies based on the nature of the specific financial instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety.

Fair value is a market-based measure considered from the perspective of a market participant who may purchase the asset or assume the liability rather than an entity-specific measure. When market assumptions are available, ASC 820 requires the Company to make assumptions regarding the assumptions that market participants would use to estimate the fair value of the financial instrument at the measurement date.

ASC 825, Financial Instruments, requires disclosure of fair value information about financial instruments, whether or not recognized in the balance sheet, for which it is practicable to estimate that value.

Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates

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presented herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction at June 30, 2016 and 2015. The estimated fair value amounts for June 30, 2016 and 2015 have been measured as of period-end, and have not been re-evaluated or updated for purposes of these Consolidated Financial Statements subsequent to those dates. As such, the estimated fair values of these financial instruments subsequent to the reporting date may be different than the amounts reported at period-end.

The information in "Note 13. Fair Value Accounting" in these Notes to Unaudited Consolidated Financial Statements should not be interpreted as an estimate of the fair value of the entire Company since a fair value calculation is only required for a limited portion of the Company’s assets and liabilities.

Due to the wide range of valuation techniques and the degree of subjectivity used in making the estimate, comparisons between the Company’s disclosures and those of other companies or banks may not be meaningful.

The following methods and assumptions were used by the Company in estimating the fair value of its financial instruments:

Cash and cash equivalents

The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks approximate their fair value.

Money market investments

The carrying amounts reported in the Consolidated Balance Sheets for money market investments approximate their fair value.

Investment securities

The fair values of CRA investments, mutual funds, and exchange-listed preferred stock are based on quoted market prices and are categorized as Level 1 in the fair value hierarchy.

The fair values of other investment securities were determined based on matrix pricing. Matrix pricing is a mathematical technique that utilizes observable market inputs including, for example, yield curves, credit ratings, and prepayment speeds. Fair values determined using matrix pricing are generally categorized as Level 2 in the fair value hierarchy.

The Company owns certain CDOs for which quoted prices are not available. Quoted prices for similar assets are also not available for these investment securities. In order to determine the fair value of these securities, the Company engages a third party to estimate the future cash flows and discount rate using third party quotes adjusted based on assumptions a market participant would assume necessary for each specific security. As a result of the lack of an active market, the resulting fair values have been categorized as Level 3 in the fair value hierarchy.

Restricted stock

WAB is a member of the Federal Reserve System and the FHLB and, accordingly, maintains investments in the capital stock of the FRB and the FHLB. WAB also maintains an investment in its primary correspondent bank. These investments are carried at cost since no ready market exists for them, and they have no quoted market value. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists. The fair values of these investments have been categorized as Level 2 in the fair value hierarchy.

Loans

The fair value of loans is estimated based on discounted cash flows using interest rates currently being offered for loans with similar terms to borrowers with similar credit quality and adjustments that the Company believes a market participant would consider in determining fair value based on a third party independent valuation. As a result, the fair value for certain loans is categorized as Level 2 in the fair value hierarchy, excluding impaired loans which are categorized as Level 3.

Accrued interest receivable and payable

The carrying amounts reported in the Consolidated Balance Sheets for accrued interest receivable and payable approximate their fair value.

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Derivative financial instruments

All derivatives are recognized in the Consolidated Balance Sheets at their fair value. The fair value for derivatives is determined based on market prices, broker-dealer quotations on similar products, or other related input parameters. As a result, the fair values have been categorized as Level 2 in the fair value hierarchy.

Deposits

The fair value disclosed for demand and savings deposits is by definition equal to the amount payable on demand at their reporting date (that is, their carrying amount), which the Company believes a market participant would consider in determining fair value. The carrying amount for variable-rate deposit accounts approximates their fair value. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on these deposits. The fair value measurement of the deposit liabilities is categorized as Level 2 in the fair value hierarchy.

FHLB advances and other borrowed funds

The fair values of the Company’s borrowings are estimated using discounted cash flow analyses, based on the market rates for similar types of borrowing arrangements. The FHLB advances have been categorized as Level 2 in the fair value hierarchy due to their short durations. Other borrowings have been categorized as Level 3 in the fair value hierarchy.

Subordinated debt

The fair value of subordinated debt is based on the market rate for the respective subordinated debt security. Subordinated debt has been categorized as Level 3 in the fair value hierarchy.

Junior subordinated debt

Junior subordinated debt is valued based on a discounted cash flow model which uses as inputs Treasury Bond rates and the 'BB' rated financial index. Junior subordinated debt has been categorized as Level 3 in the fair value hierarchy.

Off-balance sheet instruments

The fair value of the Company’s off-balance sheet instruments (lending commitments and standby letters of credit) is based on quoted fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements, and the counterparties’ credit standing.

Recent accounting pronouncements

In June 2014, the FASB issued guidance within ASU 2014-12, Accounting for Share-Based Payments When the Terms of anAward Provide That a Performance Target Could Be Achieved after the Requisite Service Period. The amendments in ASU 2014-12 to Topic 718, Compensation - Stock Compensation, provide explicit guidance on whether to treat a performance target that could be achieved after the requisite service period as a performance condition that affects vesting or as a nonvesting condition that affects the grant-date fair value of an award. The amendments are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. An entity may elect to apply the amendments either prospectively to all awards granted or modified after the effective date or retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.

In August 2014, the FASB issued guidance within ASU 2014-15, Presentation of Financial Statements - Going Concern. The amendments in ASU 2014-15 to Subtopic 205-40, Going Concern, provide guidance about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern. The amendments require management to assess an entity's ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. The amendments are effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Early application is permitted. The adoption of this guidance is not expected to have a material impact on the Company’s Consolidated Financial Statements.

In February 2015, the FASB issued guidance within ASU 2015-02, Amendments to the Consolidation Analysis. The amendments in ASU 2015-02 to Topic 810, Consolidation, change the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. Specifically, the amendments modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminate the

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presumption that a general partner should consolidate a limited partnership, affect the consolidation analysis of reporting entities that are involved with variable interest entities, particularly those that have fee arrangements and related party relationships, and provide a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. The amendments are effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. An entity may apply the amendments in this Update using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption or, may apply the amendments retrospectively. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.

In November 2015, the FASB issued guidance within ASU 2015-17, Income Taxes. The amendments in ASU 2015-17 to Topic 740, Income Taxes, changes the presentation of deferred income tax liabilities and assets, from previously bifurcated current and noncurrent, to a single noncurrent amount on the classified statement of financial position. The amendment is effective from the annual period ending after December 15, 2016, and for and interim periods within those annual periods. Early application is permitted. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In January 2016, the FASB issued guidance within ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in ASU 2016-01 to Subtopic 825-10, Financial Instruments, contain the following elements: 1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; 2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; 4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 5) requires an entity to present separately in OCI the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; 6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or accompanying notes to the financial statements; 7) clarifies that the entity should evaluate the need for a valuation allowance on a deferred tax asset related to AFS securities in combination with the entity's other deferred tax assets. The amendments are effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. Except for the early application of the amendment noted in item 5) above (which the Company elected to early adopt effective January 1, 2015 as discussed in the Company's Annual Report on Form 10-K for the year ended December 31, 2015), early adoption of the amendments in this Update is not permitted. The adoption of the other amendments in this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In February 2016, the FASB issued guidance within ASU 2016-02, Leases. The amendments in ASU 2016-02 to Topic 842, Leases, require lessees to recognize the lease assets and lease liabilities arising from operating leases in the statement of financial position. The accounting applied by a lessor is largely unchanged from that applied under previous GAAP. The amendments in this Update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. Management is in the process of evaluating the effects that the standard is expected to have on the Company's Consolidated Financial Statements and related disclosures.

In March 2016, the FASB issued guidance within ASU 2016-05, Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships. The amendments in ASU 2016-05 to Topic 815, Derivatives and Hedging, clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. An entity has the option to apply the amendments in this Update on either a prospective basis or a modified retrospective basis. The amendments in this Update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In March 2016, the FASB issued guidance within ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. The amendments in ASU 2016-09 to Topic 718, Compensation - Stock Compensation, require recognition of all excess tax benefits and tax deficiencies through income tax expense or benefit in the income statement. Other amendments in this ASU include guidance on the classification of share-based payment transactions in the statement of cash flows and an option to account for forfeitures of share-based awards as they occur rather than estimating the compensation cost based on the number of awards that are expected to vest. The amendments in this Update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any interim or annual period. Effective January 1, 2016, the Company elected early adoption of ASU 2016-09, Improvements to Employee Share-Based

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Payment Accounting. As a result of adoption, the Company recognized a $3.9 million tax benefit as a reduction of income tax expense. The Company has elected to continue to estimate compensation cost based on the number of awards that are expected to vest. The adoption of this guidance did not have a significant impact on the Company's Consolidated Statement of Cash Flows.

In June 2016, the FASB issued guidance within ASU 2016-13, Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 to Topic 326, Financial Instruments - Credit Losses, require that an organization measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU also requires enhanced disclosures, including qualitative and quantitative disclosures that provide additional information about the amounts recorded in the financial statements. Additionally, the ASU amends the accounting for credit losses on AFS debt securities and purchased financial assets with credit deterioration. The amendments in this Update are effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Management is in the process of evaluating the effects that the standard is expected to have on the Company's Consolidated Financial Statements and related disclosures.

2. INVESTMENT SECURITIES

The carrying amounts and fair values of investment securities at June 30, 2016 and December 31, 2015 are summarized as follows: 

	June 30, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
	(in thousands)
Held-to-maturity
Tax-exempt bonds	$	36,929	$	4,233	$	—		$	41,162
Available-for-sale
Collateralized debt obligations	$	50	$	10,133	$	—		$	10,183
Commercial MBS issued by GSEs	43,432		1,066		—			44,498
Corporate debt securities	7,765		597		—			8,362
CRA investments	34,984		399		—			35,383
Municipal obligations	326,306		20,455		—			346,761
Preferred stock	104,581		5,563		(868		)	109,276
Private label commercial MBS	3,728		—		(7		)	3,721
Private label residential MBS	337,891		3,072		(1,608		)	339,355
Residential MBS issued by GSEs	1,184,185		23,603		(43		)	1,207,745
Trust preferred securities	32,000		—		(8,299		)	23,701
U.S. government sponsored agency securities	34,000		3		—			34,003
U.S. treasury securities	2,496		55		—			2,551
Total AFS securities	$	2,111,418	$	64,946	$	(10,825	)	$	2,165,539
Securities measured at fair value
Residential MBS issued by GSEs								$	1,326

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	December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	50	$	10,059	$	(49	)	$	10,060
Commercial MBS issued by GSEs	19,147		72		(105		)	19,114
Corporate debt securities	12,769		482		—			13,251
CRA investments	34,722		—		(37		)	34,685
Municipal obligations	320,087		14,743		—			334,830
Preferred stock	108,417		4,286		(1,467		)	111,236
Private label commercial MBS	4,685		6		—			4,691
Private label residential MBS	261,530		5		(4,407		)	257,128
Residential MBS issued by GSEs	1,169,631		5,254		(4,664		)	1,170,221
Trust preferred securities	32,000		—		(7,686		)	24,314
U.S. treasury securities	2,996		—		(3		)	2,993
Total AFS securities	$	1,966,034	$	34,907	$	(18,418	)	$	1,982,523
Securities measured at fair value
Residential MBS issued by GSEs								$	1,481

For additional information on the fair value changes of securities measured at fair value, see the trading securities table in "Note 13. Fair Value Accounting" of these Notes to Unaudited Consolidated Financial Statements.

The Company conducts an OTTI analysis on a quarterly basis. The initial indication of OTTI for both debt and equity securities is a decline in the market value below the amount recorded for an investment, and taking into account the severity and duration of the decline. Another potential indication of OTTI is a downgrade below investment grade. In determining whether an impairment is OTTI, the Company considers the length of time and the extent to which the market value has been below cost, recent events specific to the issuer, including investment downgrades by rating agencies and economic conditions of its industry, and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery. For marketable equity securities, the Company also considers the issuer’s financial condition, capital strength, and near-term prospects.

For debt securities, for the purpose of an OTTI analysis, the Company also considers the cause of the price decline (general level of interest rates, credit spreads, and industry and issuer-specific factors), the issuer’s financial condition, near-term prospects, and current ability to make future payments in a timely manner, as well as the issuer’s ability to service debt, and any change in agencies’ ratings at the evaluation date from the acquisition date and any likely imminent action.

The Company has reviewed securities for which there is an unrealized loss in accordance with its accounting policy for OTTI described above and determined that there were no impairment charges for the three and six months endedJune 30, 2016 and 2015. The Company does not consider any securities to be other-than-temporarily impaired as of June 30, 2016 and December 31, 2015. No assurance can be made that OTTI will not occur in future periods.

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Information pertaining to securities with gross unrealized losses at June 30, 2016 and December 31, 2015, aggregated by investment category and length of time that individual securities have been in a continuous loss position follows:

	June 30, 2016
	Less Than Twelve Months				More Than Twelve Months				Total
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale
Preferred stock	$	182	$	10,729	$	686	$	8,680	$	868	$	19,409
Private label commercial MBS	7		3,721		—		—		7		3,721
Private label residential MBS	965		99,654		643		30,653		1,608		130,307
Residential MBS issued by GSEs	15		21,009		28		14,334		43		35,343
Trust preferred securities	—		—		8,299		23,701		8,299		23,701
Total AFS securities	$	1,169	$	135,113	$	9,656	$	77,368	$	10,825	$	212,481

	December 31, 2015
	Less Than Twelve Months				More Than Twelve Months				Total
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	49	$	1	$	—	$	—	$	49	$	1
Commercial MBS issued by GSEs	105		17,051		—		—		105		17,051
CRA investments	37		24,729		—		—		37		24,729
Preferred stock	377		10,542		1,090		14,761		1,467		25,303
Private label residential MBS	3,733		226,720		674		30,372		4,407		257,092
Residential MBS issued by GSEs	3,566		536,515		1,098		38,338		4,664		574,853
Trust preferred securities	—		—		7,686		24,314		7,686		24,314
U.S. treasury securities	3		2,006		—		—		3		2,006
Total AFS securities	$	7,870	$	817,564	$	10,548	$	107,785	$	18,418	$	925,349

At June 30, 2016 and December 31, 2015, the Company’s unrealized losses relate primarily to interest rate fluctuations, credit spread widening, and reduced liquidity in applicable markets. The total number of securities in an unrealized loss position at June 30, 2016 was 59, compared to 146 at December 31, 2015. In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and industry analysis reports. Since material downgrades have not occurred and management does not intend to sell the debt securities in an unrealized loss position in the foreseeable future, none of the securities described in the above table or in this paragraph were deemed to be OTTI.

The preferred stock and trust preferred securities have yields based on floating rate LIBOR, which are highly correlated to the federal funds rate and have been negatively affected by the low rate environment. This has resulted in unrealized losses for these securities.

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The table below shows the amortized cost and fair value of securities as of June 30, 2016, by contractual maturities. MBS are shown separately as individual MBS are comprised of pools of loans with varying maturities. Therefore, these securities are listed separately in the maturity summary. 

	June 30, 2016
	Amortized Cost		Estimated Fair Value
	(in thousands)
Held-to-maturity
After five years through ten years	$	15,445	$	17,187
After ten years	21,484		23,975
Total HTM securities	$	36,929	$	41,162
Available-for-sale
Due in one year or less	$	55,422	$	56,134
After one year through five years	73,571		77,406
After five years through ten years	89,966		93,725
After ten years	323,223		342,955
Mortgage-backed securities	1,569,236		1,595,319
Total AFS securities	$	2,111,418	$	2,165,539

The following tables summarize the carrying amount of the Company’s investment ratings position as of June 30, 2016 and December 31, 2015: 

	June 30, 2016
	AAA		Split-rated AAA/AA+		AA+ to AA-		A+ to A-		BBB+ to BBB-		BB+ and below		Unrated		Totals
	(in thousands)
Held-to-maturity
Tax-exempt bonds	$	15,445	$	—	$	—	$	—	$	—	$	—	$	21,484	$	36,929
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	—	$	—	$	—	$	10,183	$	—	$	10,183
Commercial MBS issued by GSEs	—		27,050		—		—		—		—		17,448		44,498
Corporate debt securities	—		—		2,701		5,661		—		—		—		8,362
CRA investments	—		—		—		—		—		—		35,383		35,383
Municipal obligations	7,853		—		200,699		131,929		6,109		170		1		346,761
Preferred stock	—		—		—		—		71,814		19,330		18,132		109,276
Private label commercial MBS	3,721		—		—		—		—		—		—		3,721
Private label residential MBS	275,956		—		34,733		2,625		1,243		2,858		21,940		339,355
Residential MBS issued by GSEs	—		1,207,745		—		—		—		—		—		1,207,745
Trust preferred securities	—		—		—		—		23,701		—		—		23,701
U.S. government sponsored agency securities	—		34,003		—		—		—		—		—		34,003
U.S. treasury securities	—		2,551		—		—		—		—		—		2,551
Total AFS securities (1)	$	287,530	$	1,271,349	$	238,133	$	140,215	$	102,867	$	32,541	$	92,904	$	2,165,539
Securities measured at fair value
Residential MBS issued by GSEs	$	—	$	1,326	$	—	$	—	$	—	$	—	$	—	$	1,326

(1) Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch.

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	December 31, 2015
	AAA		Split-rated AAA/AA+		AA+ to AA-		A+ to A-		BBB+ to BBB-		BB+ and below		Unrated		Totals
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	—	$	—	$	—	$	10,060	$	—	$	10,060
Commercial MBS issued by GSEs	—		19,114		—		—		—		—		—		19,114
Corporate debt securities	—		—		2,721		5,489		5,041		—		—		13,251
CRA investments	—		—		—		—		—		—		34,685		34,685
Municipal obligations	7,949		—		180,460		131,110		6,243		180		8,888		334,830
Preferred stock	—		—		—		—		79,955		23,655		7,626		111,236
Private label commercial MBS	4,691		—		—		—		—		—		—		4,691
Private label residential MBS	235,605		—		40		3,186		1,750		2,705		13,842		257,128
Residential MBS issued by GSEs	—		1,170,221		—		—		—		—		—		1,170,221
Trust preferred securities	—		—		—		—		24,314		—		—		24,314
U.S. treasury securities	—		2,993		—		—		—		—		—		2,993
Total AFS securities (1)	$	248,245	$	1,192,328	$	183,221	$	139,785	$	117,303	$	36,600	$	65,041	$	1,982,523
Securities measured at fair value
Residential MBS issued by GSEs	$	—	$	1,481	$	—	$	—	$	—	$	—	$	—	$	1,481

(1) Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch.

Securities with carrying amounts of approximately $833.9 million and $830.7 million at June 30, 2016 and December 31, 2015, respectively, were pledged for various purposes as required or permitted by law.

The following table presents gross gains and losses on sales of investment securities: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016			2015
Gross gains	$	—	$	55	$	2,057		$	1,103
Gross losses	—		—		(1,056		)	(459		)
Net gains on sales of investment securities	$	—	$	55	$	1,001		$	644

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3. LOANS, LEASES AND ALLOWANCE FOR CREDIT LOSSES

The composition of the Company’s held for investment loan portfolio is as follows: 

	June 30, 2016			December 31, 2015
	(in thousands)
Commercial and industrial	$	5,454,939		$	5,114,257
Commercial real estate - non-owner occupied	3,601,331			2,283,536
Commercial real estate - owner occupied	2,008,261			2,083,285
Construction and land development	1,333,537			1,133,439
Residential real estate	293,020			322,939
Commercial leases	122,668			148,493
Consumer	41,755			26,905
Loans, net of deferred loan fees and costs	12,855,511			11,112,854
Allowance for credit losses	(122,104		)	(119,068		)
Total loans HFI	$	12,733,407		$	10,993,786

Net deferred loan fees and costs as of June 30, 2016 and December 31, 2015 total $19.8 million and $19.2 million, respectively, which is a reduction in the carrying value of loans. Net unamortized discounts on loans total $7.5 million and $8.2 million as of June 30, 2016 and December 31, 2015, respectively. Total loans held for investment are also net of interest rate and credit marks on acquired loans totaling $84.7 million and $40.5 million as of June 30, 2016 and December 31, 2015, respectively, which is a reduction in the carrying value of acquired loans.

As of June 30, 2016 and December 31, 2015, the Company also had $22.3 million and $23.8 million of HFS loans, respectively.

The following table presents the contractual aging of the recorded investment in past due loans held for investment by class of loans:

	June 30, 2016
	Current		30-59 Days Past Due		60-89 Days Past Due		Over 90 days Past Due		Total Past Due		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,002,907	$	130	$	—	$	5,224	$	5,354	$	2,008,261
Non-owner occupied	3,408,792		1,610		—		—		1,610		3,410,402
Multi-family	190,929		—		—		—		—		190,929
Commercial and industrial
Commercial	5,441,453		150		1,598		11,738		13,486		5,454,939
Leases	122,560		70		38		—		108		122,668
Construction and land development
Construction	850,558		—		—		—		—		850,558
Land	481,695		—		—		1,284		1,284		482,979
Residential real estate	288,640		205		641		3,534		4,380		293,020
Consumer	41,573		4		15		163		182		41,755
Total loans	$	12,829,107	$	2,169	$	2,292	$	21,943	$	26,404	$	12,855,511

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	December 31, 2015
	Current		30-59 Days Past Due		60-89 Days Past Due		Over 90 days Past Due		Total Past Due		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,078,968	$	445	$	362	$	3,510	$	4,317	$	2,083,285
Non-owner occupied	2,099,274		2,481		—		2,822		5,303		2,104,577
Multi-family	178,959		—		—		—		—		178,959
Commercial and industrial
Commercial	5,066,197		26,358		14,124		7,578		48,060		5,114,257
Leases	145,905		—		—		2,588		2,588		148,493
Construction and land development
Construction	694,527		—		—		—		—		694,527
Land	438,495		—		—		417		417		438,912
Residential real estate	317,677		888		159		4,215		5,262		322,939
Consumer	26,587		12		91		215		318		26,905
Total loans	$	11,046,589	$	30,184	$	14,736	$	21,345	$	66,265	$	11,112,854

The following table presents the recorded investment in non-accrual loans and loans past due ninety days or more and still accruing interest by class of loans: 

	June 30, 2016								December 31, 2015
	Non-accrual loans						Loans past due 90 days or more and still accruing		Non-accrual loans						Loans past due 90 days or more and still accruing
	Current		Past Due/ Delinquent		Total Non-accrual				Current		Past Due/ Delinquent		Total Non-accrual
	(in thousands)
Commercial real estate
Owner occupied	$	1,069	$	1,698	$	2,767	$	3,526	$	749	$	3,253	$	4,002	$	339
Non-owner occupied	8,129		—		8,129		—		11,851		2,822		14,673		—
Multi-family	—		—		—		—		—		—		—		—
Commercial and industrial
Commercial	13,032		9,380		22,412		3,461		3,263		15,026		18,289		2,671
Leases	—		—		—		—		—		2,588		2,588		—
Construction and land development
Construction	—		—		—		—		—		—		—		—
Land	—		1,284		1,284		—		1,892		417		2,309		—
Residential real estate	1,400		3,534		4,934		4		1,835		4,489		6,324		—
Consumer	—		159		159		—		—		196		196		18
Total	$	23,630	$	16,055	$	39,685	$	6,991	$	19,590	$	28,791	$	48,381	$	3,028

The reduction in interest income associated with loans on non-accrual status was approximately $0.5 million and $0.7 million for three months endedJune 30, 2016 and 2015, respectively, and $0.9 million and $1.4 million for the six months endedJune 30, 2016 and 2015, respectively.

The Company utilizes an internal asset classification system as a means of reporting problem and potential problem loans. Under the Company’s risk rating system, the Company classifies problem and potential problem loans as Special Mention, Substandard, Doubtful, and Loss. Substandard loans include those characterized by well-defined weaknesses and carry the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loans classified as Doubtful, or risk rated eight, have all the weaknesses inherent in those classified as Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The final rating of Loss covers loans considered uncollectible and having such little recoverable value that it is not practical to defer writing off the asset. Loans that do not currently expose the Company to sufficient risk to warrant classification in one of the aforementioned categories, but possess weaknesses that warrant management’s close attention, are deemed to be Special Mention. Risk ratings are updated, at a minimum, quarterly.

26

The following tables present HFI loans by risk rating: 

	June 30, 2016
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Commercial real estate
Owner occupied	$	1,965,474	$	28,077	$	12,787	$	1,923	$	—	$	2,008,261
Non-owner occupied	3,316,897		44,045		49,460		—		—		3,410,402
Multi-family	190,929		—		—		—		—		190,929
Commercial and industrial
Commercial	5,330,572		72,170		52,197		—		—		5,454,939
Leases	122,136		201		331		—		—		122,668
Construction and land development
Construction	825,983		8,420		16,155		—		—		850,558
Land	469,291		499		13,189		—		—		482,979
Residential real estate	282,079		349		10,592		—		—		293,020
Consumer	41,392		62		301		—		—		41,755
Total	$	12,544,753	$	153,823	$	155,012	$	1,923	$	—	$	12,855,511

	June 30, 2016
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Current (up to 29 days past due)	$	12,542,844	$	150,510	$	133,830	$	1,923	$	—	$	12,829,107
Past due 30 - 59 days	1,894		129		146		—		—		2,169
Past due 60 - 89 days	—		229		2,063		—		—		2,292
Past due 90 days or more	15		2,955		18,973		—		—		21,943
Total	$	12,544,753	$	153,823	$	155,012	$	1,923	$	—	$	12,855,511

	December 31, 2015
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,032,932	$	28,422	$	20,814	$	1,117	$	—	$	2,083,285
Non-owner occupied	2,054,428		14,867		35,282		—		—		2,104,577
Multi-family	178,959		—		—		—		—		178,959
Commercial and industrial
Commercial	4,962,930		76,283		74,294		750		—		5,114,257
Leases	140,531		4,580		794		2,588		—		148,493
Construction and land development
Construction	678,438		16,089		—		—		—		694,527
Land	420,819		362		17,731		—		—		438,912
Residential real estate	310,067		776		12,096		—		—		322,939
Consumer	26,438		209		258		—		—		26,905
Total	$	10,805,542	$	141,588	$	161,269	$	4,455	$	—	$	11,112,854

27

	December 31, 2015
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Current (up to 29 days past due)	$	10,799,558	$	140,932	$	104,232	$	1,867	$	—	$	11,046,589
Past due 30 - 59 days	1,907		271		28,006		—		—		30,184
Past due 60 - 89 days	4,077		385		10,274		—		—		14,736
Past due 90 days or more	—		—		18,757		2,588		—		21,345
Total	$	10,805,542	$	141,588	$	161,269	$	4,455	$	—	$	11,112,854

The table below reflects the recorded investment in loans classified as impaired: 

	June 30, 2016			December 31, 2015
	(in thousands)
Impaired loans with a specific valuation allowance under ASC 310 (1)	$	20,695		$	24,287
Impaired loans without a specific valuation allowance under ASC 310 (2)	95,771			104,587
Total impaired loans	$	116,466		$	128,874
Valuation allowance related to impaired loans (3)	$	(6,395	)	$	(4,658	)

(1) Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

(2) Includes TDR loans of $68.6 million and $85.9 million at June 30, 2016 and December 31, 2015, respectively.

(3) Includes valuation allowance related to TDR loans of $0.2 million and $0.3 million at June 30, 2016 and December 31, 2015, respectively.

The following table presents impaired loans by class: 

	June 30, 2016		December 31, 2015
	(in thousands)
Commercial real estate
Owner occupied	$	18,142	$	23,153
Non-owner occupied	32,485		41,081
Multi-family	—		—
Commercial and industrial
Commercial	32,042		26,513
Leases	332		2,896
Construction and land development
Construction	4		—
Land	17,531		18,322
Residential real estate	15,667		16,575
Consumer	263		334
Total	$	116,466	$	128,874

A valuation allowance is established for an impaired loan when the fair value of the loan is less than the recorded investment. In certain cases, portions of impaired loans are charged-off to realizable value instead of establishing a valuation allowance and are included, when applicable, in the table above as “Impaired loans without a specific valuation allowance under ASC 310.” However, before concluding that an impaired loan needs no associated valuation allowance, an assessment is made to consider all available and relevant information for the method used to evaluate impairment and the type of loan being assessed. The valuation allowance disclosed above is included in the allowance for credit losses reported in the Consolidated Balance Sheets as of June 30, 2016 and December 31, 2015.

28

The following table presents the average investment in impaired loans and income recognized on impaired loans: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Average balance on impaired loans	$	109,833	$	155,943	$	116,173	$	159,186
Interest income recognized on impaired loans, accrual basis	1,050		1,126		2,163		2,310
Interest recognized on non-accrual loans, cash basis	225		548		397		1,201

The following table presents average investment in impaired loans by loan class: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Commercial real estate
Owner occupied	$	19,075	$	38,750	$	20,406	$	40,839
Non-owner occupied	31,894		59,873		32,463		62,636
Multi-family	—		—		—		—
Commercial and industrial
Commercial	24,299		12,401		28,001		12,835
Leases	333		4,879		1,191		2,618
Construction and land development
Construction	—		—		—		—
Land	18,299		19,834		18,099		20,523
Residential real estate	15,635		19,838		15,700		19,375
Consumer	298		368		313		360
Total	$	109,833	$	155,943	$	116,173	$	159,186

The average investment in TDR loans included in the average investment in impaired loans table above for the three months endedJune 30, 2016 and 2015 was $72.1 million and $121.2 million, respectively, and $75.1 million and $123.6 million for the six months endedJune 30, 2016 and 2015, respectively.

The following table presents interest income on impaired loans by class: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Commercial real estate
Owner occupied	$	247	$	406	$	542	$	827
Non-owner occupied	313		360		651		690
Multi-family	—		—		—		—
Commercial and industrial
Commercial	121		60		229		139
Leases	4		—		36		—
Construction and land development
Construction	—		—		—		—
Land	239		197		446		392
Residential real estate	125		102		256		259
Consumer	1		1		3		3
Total	$	1,050	$	1,126	$	2,163	$	2,310

The Company is not committed to lend significant additional funds on these impaired loans.

29

The following table summarizes nonperforming assets: 

	June 30, 2016		December 31, 2015
	(in thousands)
Non-accrual loans (1)	$	39,685	$	48,381
Loans past due 90 days or more on accrual status (2)	6,991		3,028
Accruing troubled debt restructured loans	65,008		70,707
Total nonperforming loans	111,684		122,116
Other assets acquired through foreclosure, net	49,842		43,942
Total nonperforming assets	$	161,526	$	166,058

(1) Includes non-accrual TDR loans of $4.2 million and $18.2 million at June 30, 2016 and December 31, 2015, respectively.

(2) Includes $1.7 million from loans acquired with deteriorated credit quality at June 30, 2016.

Loans Acquired in GE Asset Purchase

The following table presents information regarding the contractually required principal payments receivable, cash flows expected to be collected, and the preliminary estimated fair value of loans acquired in the GE asset purchase as of April 20, 2016, the closing date of the transaction. See Note 15. Mergers and Acquisitions of these Notes to Unaudited Consolidated Financial Statements for additional details related to the purchase.

	April 20, 2016
	Commercial Real Estate		Construction and Land Development		Total
	(in thousands)
Contractually required principal and interest payments:
PCI	$	143,734	$	16,088	$	159,822
Non-PCI	1,579,064		103,914		1,682,978
Total loans acquired	$	1,722,798	$	120,002	$	1,842,800
Cash flows expected to be collected:
PCI	$	107,865	$	11,754	$	119,619
Non-PCI	1,315,523		80,955		1,396,478
Total loans acquired	$	1,423,388	$	92,709	$	1,516,097
Fair value of loans acquired:
PCI	$	85,329	$	7,938	$	93,267
Non-PCI	1,122,419		65,311		1,187,730
Total loans acquired	$	1,207,748	$	73,249	$	1,280,997

Loans Acquired with Deteriorated Credit Quality

Changes in the accretable yield for loans acquired with deteriorated credit quality are as follows: 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Balance, at beginning of period	$	13,541		$	17,956		$	15,925		$	19,156
Additions due to acquisition	4,301			857			4,301			857
Reclassifications from non-accretable to accretable yield (1)	—			265			—			695
Accretion to interest income	(887		)	(1,012		)	(1,669		)	(2,090		)
Reversal of fair value adjustments upon disposition of loans	(1,092		)	(876		)	(2,694		)	(1,428		)
Balance, at end of period	$	15,863		$	17,190		$	15,863		$	17,190

(1) The primary drivers of reclassification from non-accretable to accretable yield resulted from changes in estimated cash flows.

30

Allowance for Credit Losses

The following table summarizes the changes in the allowance for credit losses by portfolio type: 

	Three Months Ended June 30,
	Construction and Land Development			Commercial Real Estate			Residential Real Estate			Commercial and Industrial			Consumer			Total
	(in thousands)
2016
Beginning Balance	$	19,425		$	23,104		$	4,938		$	71,156		$	604		$	119,227
Charge-offs	—			244			—			1,161			46			1,451
Recoveries	(58		)	(770		)	(153		)	(804		)	(43		)	(1,828		)
Provision	1,903			1,237			(545		)	(252		)	157			2,500
Ending balance	$	21,386		$	24,867		$	4,546		$	70,547		$	758		$	122,104
2015
Beginning Balance	$	17,999		$	28,111		$	6,666		$	58,651		$	671		$	112,098
Charge-offs	—			—			218			1,771			53			2,042
Recoveries	(1,373		)	(1,738		)	(1,184		)	(681		)	(24		)	(5,000		)
Provision	165			(903		)	(1,233		)	2,028			(57		)	—
Ending balance	$	19,537		$	28,946		$	6,399		$	59,589		$	585		$	115,056

	Six Months Ended June 30,
	Construction and Land Development			Commercial Real Estate			Residential Real Estate			Commercial and Industrial			Consumer			Total
	(in thousands)
2016
Beginning Balance	$	18,976		$	23,160		$	5,278		$	71,181		$	473		$	119,068
Charge-offs	—			654			26			8,652			120			9,452
Recoveries	(153		)	(4,435		)	(410		)	(2,380		)	(110		)	(7,488		)
Provision	2,257			(2,074		)	(1,116		)	5,638			295			5,000
Ending balance	$	21,386		$	24,867		$	4,546		$	70,547		$	758		$	122,104
2015
Beginning Balance	$	18,558		$	28,783		$	7,456		$	54,566		$	853		$	110,216
Charge-offs	—			—			618			2,164			107			2,889
Recoveries	(1,530		)	(2,121		)	(1,717		)	(1,597		)	(64		)	(7,029		)
Provision	(551		)	(1,958		)	(2,156		)	5,590			(225		)	700
Ending balance	$	19,537		$	28,946		$	6,399		$	59,589		$	585		$	115,056

31

The following table presents impairment method information related to loans and allowance for credit losses by loan portfolio segment: 

	Commercial Real Estate-Owner Occupied		Commercial Real Estate-Non-Owner Occupied		Commercial and Industrial		Residential Real Estate		Construction and Land Development		Commercial Leases		Consumer		Total Loans
	(in thousands)
Loans as of June 30, 2016:
Recorded Investment:
Impaired loans with an allowance recorded	$	777	$	5,331	$	13,857	$	711	$	—	$	—	$	19	$	20,695
Impaired loans with no allowance recorded	17,365		27,154		18,185		14,956		17,535		332		244		95,771
Total loans individually evaluated for impairment	18,142		32,485		32,042		15,667		17,535		332		263		116,466
Loans collectively evaluated for impairment	1,976,526		3,439,886		5,421,189		274,548		1,297,386		122,336		41,492		12,573,363
Loans acquired with deteriorated credit quality	13,593		128,960		1,708		2,805		18,616		—		—		165,682
Total recorded investment	$	2,008,261	$	3,601,331	$	5,454,939	$	293,020	$	1,333,537	$	122,668	$	41,755	$	12,855,511
Unpaid Principal Balance
Impaired loans with an allowance recorded	$	777	$	5,331	$	14,109	$	766	$	—	$	—	$	19	$	21,002
Impaired loans with no allowance recorded	60,891		53,045		89,584		42,458		84,600		484		3,968		335,030
Total loans individually evaluated for impairment	61,668		58,376		103,693		43,224		84,600		484		3,987		356,032
Loans collectively evaluated for impairment	1,976,526		3,439,886		5,421,189		274,548		1,297,386		122,336		41,492		12,573,363
Loans acquired with deteriorated credit quality	17,878		163,683		8,834		3,326		20,055		—		—		213,776
Total unpaid principal balance	$	2,056,072	$	3,661,945	$	5,533,716	$	321,098	$	1,402,041	$	122,820	$	45,479	$	13,143,171
Related Allowance for Credit Losses
Impaired loans with an allowance recorded	$	777	$	430	$	5,060	$	127	$	—	$	—	$	1	$	6,395
Impaired loans with no allowance recorded	—		—		—		—		—		—		—		—
Total loans individually evaluated for impairment	777		430		5,060		127		—		—		1		6,395
Loans collectively evaluated for impairment	11,225		12,387		63,885		4,419		21,386		1,260		757		115,319
Loans acquired with deteriorated credit quality	—		48		342		—		—		—		—		390
Total allowance for credit losses	$	12,002	$	12,865	$	69,287	$	4,546	$	21,386	$	1,260	$	758	$	122,104

32

	Commercial Real Estate-Owner Occupied		Commercial Real Estate-Non-Owner Occupied		Commercial and Industrial		Residential Real Estate		Construction and Land Development		Commercial Leases		Consumer		Total Loans
	(in thousands)
Loans as of December 31, 2015:
Recorded Investment:
Impaired loans with an allowance recorded	$	2,778	$	2,344	$	18,230	$	914	$	—	$	—	$	21	$	24,287
Impaired loans with no allowance recorded	20,375		38,737		8,283		15,661		18,322		2,896		313		104,587
Total loans individually evaluated for impairment	23,153		41,081		26,513		16,575		18,322		2,896		334		128,874
Loans collectively evaluated for impairment	2,044,934		2,180,250		5,085,299		303,372		1,115,117		145,597		26,571		10,901,140
Loans acquired with deteriorated credit quality	15,198		62,205		2,445		2,992		—		—		—		82,840
Total recorded investment	$	2,083,285	$	2,283,536	$	5,114,257	$	322,939	$	1,133,439	$	148,493	$	26,905	$	11,112,854
Unpaid Principal Balance
Impaired loans with an allowance recorded	$	2,778	$	2,344	$	19,233	$	969	$	—	$	—	$	21	$	25,345
Impaired loans with no allowance recorded	63,709		61,692		71,773		44,142		82,800		5,229		3,923		333,268
Total loans individually evaluated for impairment	66,487		64,036		91,006		45,111		82,800		5,229		3,944		358,613
Loans collectively evaluated for impairment	2,044,934		2,180,250		5,085,299		303,372		1,115,117		145,597		26,571		10,901,140
Loans acquired with deteriorated credit quality	20,227		88,181		7,820		3,536		—		—		—		119,764
Total unpaid principal balance	$	2,131,648	$	2,332,467	$	5,184,125	$	352,019	$	1,197,917	$	150,826	$	30,515	$	11,379,517
Related Allowance for Credit Losses
Impaired loans with an allowance recorded	$	858	$	11	$	3,518	$	270	$	—	$	—	$	1	$	4,658
Impaired loans with no allowance recorded	—		—		—		—		—		—		—		—
Total loans individually evaluated for impairment	858		11		3,518		270		—		—		1		4,658
Loans collectively evaluated for impairment	10,953		11,302		65,806		5,008		18,976		1,857		472		114,374
Loans acquired with deteriorated credit quality	—		36		—		—		—		—		—		36
Total allowance for credit losses	$	11,811	$	11,349	$	69,324	$	5,278	$	18,976	$	1,857	$	473	$	119,068

Troubled Debt Restructurings

A TDR loan is a loan on which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in the accrued interest, or deferral of interest payments. The majority of the Company's modifications are extensions in terms or deferral of payments which result in no lost principal or interest followed by reductions in interest rates or accrued interest. A TDR loan is also considered impaired. Consistent with regulatory guidance, a TDR loan that is subsequently modified in another restructuring agreement but has shown sustained performance and classification as a TDR, will be removed from TDR status provided that the modified terms were market-based at the time of modification.

33

The Company did not have any new TDR loans during the three and six months endedJune 30, 2016. The following table presents information on the financial effects of TDR loans by class for the three and six months endedJune 30, 2015:

	Three and Six Months Ended June 30, 2015
	Number of Loans	Pre-Modification Outstanding Recorded Investment		Forgiven Principal Balance		Lost Interest Income		Post-Modification Outstanding Recorded Investment		Waived Fees and Other Expenses
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	$	—	$	—	$	—	$	—
Non-owner occupied	—	—		—		—		—		—
Multi-family	—	—		—		—		—		—
Commercial and industrial
Commercial	1	256		—		—		256		—
Leases	—	—		—		—		—		—
Construction and land development
Construction	—	—		—		—		—		—
Land	—	—		—		—		—		—
Residential real estate	—	—		—		—		—		—
Consumer	—	—		—		—		—		—
Total	1	$	256	$	—	$	—	$	256	$	—

The following table presents TDR loans by class for which there was a payment default during the period: 

	Three Months Ended June 30,
	2016			2015
	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	—	$	—
Non-owner occupied	—	—		—	—
Multi-family	—	—		—	—
Commercial and industrial
Commercial	—	—		—	—
Leases	—	—		—	—
Construction and land development
Construction	—	—		—	—
Land	—	—		—	—
Residential real estate	1	333		1	202
Consumer	—	—		—	—
Total	1	$	333	1	$	202

34

	Six Months Ended June 30,
	2016			2015
	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	—	$	—
Non-owner occupied	1	5,381		—	—
Multi-family	—	—		—	—
Commercial and industrial
Commercial	—	—		—	—
Leases	—	—		—	—
Construction and land development
Construction	—	—		1	137
Land	—	—		—	—
Residential real estate	1	333		1	202
Consumer	—	—		—	—
Total	2	$	5,714	2	$	339

A TDR loan is deemed to have a payment default when it becomes past due 90 days, goes on non-accrual, or is restructured again. Payment defaults, along with other qualitative indicators, are considered by management in the determination of the allowance for credit losses.

At June 30, 2016, there were no loan commitments outstanding on TDR loans. At December 31, 2015, there was $0.1 million in loan commitments outstanding on TDR loans.

Loan Purchases and Sales

For the three months endedJune 30, 2016 and 2015, secondary market loan purchases totaled $64.6 million and $7.7 million, respectively. For the three months endedJune 30, 2016, these purchased loans consisted primarily of commercial and industrial loans and for the same period in 2015, these purchased loans consisted of $2.0 million of commercial and industrial loans and $5.7 million of commercial real estate loans. For the six months endedJune 30, 2016 and 2015, secondary market loan purchases totaled $98.3 million and $26.1 million, respectively. For the six months endedJune 30, 2016, these purchased loans consisted primarily of commercial and industrial loans and for the same period in 2015, these purchased loans consisted of $13.0 million of commercial and industrial loans, $11.7 million of commercial real restate loans, and $1.4 million of commercial leases.

During the six months endedJune 30, 2016, the Company sold loans, which consisted primarily of commercial real estate and commercial and industrial loans, with a carrying value of $23.8 million and recognized a gain of $2.5 million on the sales. During the six months endedJune 30, 2015, the Company sold loans, which primarily consisted of commercial and industrial loans, with a carrying value of $56.3 million and recognized a gain of $0.3 million.

35

4. OTHER ASSETS ACQUIRED THROUGH FORECLOSURE

The following table represents the changes in other assets acquired through foreclosure: 

	Three Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	61,346		$	(8,570	)	$	52,776
Transfers to other assets acquired through foreclosure, net	88			—			88
Proceeds from sale of other real estate owned and repossessed assets, net	(4,480		)	1,813			(2,667		)
Valuation adjustments, net	—			134			134
Gains, net (1)	(489		)	—			(489		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	77,968		$	(14,209	)	$	63,759
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	5,739			—			5,739
Proceeds from sale of other real estate owned and repossessed assets, net	(15,415		)	2,480			(12,935		)
Valuation adjustments, net	—			(718		)	(718		)
Gains, net (1)	1,940			—			1,940
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(1) There were no net gains related to initial transfers to other assets during each of the three months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

	Six Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	52,984		$	(9,042	)	$	43,942
Transfers to other assets acquired through foreclosure, net	10,726			—			10,726
Proceeds from sale of other real estate owned and repossessed assets, net	(6,916		)	2,108			(4,808		)
Valuation adjustments, net	—			311			311
Gains, net (2)	(329		)	—			(329		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	71,421		$	(14,271	)	$	57,150
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	13,459			—			13,459
Proceeds from sale of other real estate owned and repossessed assets, net	(17,703		)	3,328			(14,375		)
Valuation adjustments, net	—			(1,504		)	(1,504		)
Gains, net (2)	3,055			—			3,055
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(2) Includes net gains related to initial transfers to other assets of zero and $0.6 million during the six months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

At June 30, 2016, and 2015, the majority of the Company’s repossessed assets consisted of properties located in Nevada. The Company held 34 properties at June 30, 2016, compared to 39 at December 31, 2015, and 56 at June 30, 2015.

36

5. OTHER BORROWINGS

The following table summarizes the Company’s borrowings as of June 30, 2016 and December 31, 2015: 

	June 30, 2016		December 31, 2015
	(in thousands)
Short-Term:
Federal funds purchased	$	—	$	—
FHLB advances	—		150,000
Total short-term borrowings	$	—	$	150,000

The Company maintains other lines of credit with correspondent banks totaling $170.0 million, of which $25.0 million is secured by pledged securities and has a floating interest rate of one-month or three-month LIBOR plus 1.50%. The remaining $145.0 million is unsecured. As of June 30, 2016 and December 31, 2015, there were no outstanding balances on these lines of credit.

The Company maintains lines of credit with the FHLB and the FRB. The Company’s borrowing capacity is determined based on collateral pledged, generally consisting of investment securities and loans, at the time of the borrowing. At June 30, 2016, there were no short-term FHLB advances. At December 31, 2015, short-term FHLB advances of $150.0 million had a weighted average interest rate of 0.36%.

As of June 30, 2016 and December 31, 2015, the Company had additional available credit with the FHLB of approximately $1.55 billion and $1.54 billion, respectively, and with the FRB of approximately $1.08 billion and $1.21 billion, respectively.

6. QUALIFYING DEBT

Subordinated Debt

On June 16, 2016, the Company issued $175.0 million of subordinated debentures with a maturity date of July 1, 2056. Beginning on or after July 1, 2021, the Company may redeem the debentures, in whole or in part, at their principal amount plus any accrued and unpaid interest. The subordinated debt was recorded net of issuance costs of $5.5 million. The debentures have an interest rate of 6.25% per annum. To hedge the interest rate risk, WAL entered into a fair value interest rate hedge with a pay variable/receive fixed swap. The carrying value of all subordinated debt, which includes the effective portion of related hedges, totals $325.8 million at June 30, 2016.

Junior Subordinated Debt

The Company has formed or acquired through acquisitions eight statutory business trusts, which exist for the exclusive purpose of issuing Cumulative Trust Preferred Securities.

With the exception of debt issued by Bridge Capital Trust I and Bridge Capital Trust II, junior subordinated debt is recorded at fair value at each reporting date due to the FVO election made by the Company under ASC 825. The Company did not make the FVO election for the Bridge junior subordinated debt. Accordingly, the carrying value of these trusts does not reflect the current fair value of the debt and includes a fair market value adjustment established at acquisition that is being accreted over the remaining life of the trusts. The carrying value of junior subordinated debt was $56.3 million and $58.4 million at June 30, 2016 and December 31, 2015, respectively.

The weighted average interest rate of all junior subordinated debt as of June 30, 2016 was 2.99%, which is three-month LIBOR plus the contractual spread of 2.34%, compared to a weighted average interest rate of 2.95% at December 31, 2015.

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7. STOCKHOLDERS' EQUITY

Common Stock Issuance

Under ATM Distribution Agreement

On June 4, 2014, the Company entered into a distribution agency agreement with Credit Suisse Securities (USA) LLC, under which the Company could sell shares of its common stock up to an aggregate offering price of $100.0 million on the New York Stock Exchange. The parties executed an Amended and Restated Distribution Agency Agreement on October 30, 2014. The Company pays Credit Suisse Securities (USA) LLC a mutually agreed rate, not to exceed 2% of the gross offering proceeds of the shares. The common stock will be sold at prevailing market prices at the time of the sale or at negotiated prices and, as a result, prices will vary.

Sales in the ATM offering were previously being made pursuant to a prospectus dated May 14, 2012 and a prospectus supplement filed with the SEC on June 4, 2014, in connection with one or more offerings of shares from the Company's shelf registration statement on Form S-3 (No. 333-181128), which expired on May 14, 2015. On May 7, 2015, the Company filed with the SEC a new shelf registration statement on Form S-3 (No. 333-203959). During the three and six months endedJune 30, 2016, the Company sold 1.6 million shares under the ATM offering at a weighted-average selling price of $36.63 per share for gross proceeds of $56.8 million. Total offering costs under the ATM offering for the three and six months endedJune 30, 2016, were $1.0 million, of which $0.9 million relates to compensation costs paid to Credit Suisse Securities. As the Company completed $100.0 million in aggregate sales under the ATM offering, the Company's ATM offering has expired and the Amended and Restated Distribution Agency Agreement has terminated. During the three and six months endedJune 30, 2015, there were no sales under the ATM offering.

Stock-Based Compensation

Restricted Stock Awards

For the three and six months endedJune 30, 2016, there were 38,845 and 352,510 shares of restricted stock awards granted to employees that generally vest over a three-year period. For the six months endedJune 30, 2016, a total of 63,000 shares of restricted stock were granted to non-employee WAL directors that were fully vested at June 30, 2016. The Company estimates the compensation cost for stock grants based upon the grant date fair value. Stock compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. The aggregate grant date fair value for the restricted stock awards granted during the three and six months endedJune 30, 2016 was $1.5 million and $13.3 million, respectively. For three and six months endedJune 30, 2016, the Company recognized $3.7 million and $7.5 million in stock-based compensation expense related to all restricted stock award grants, including those assumed as part of the Bridge acquisition, compared to $2.6 million and $5.1 million for the three and six months endedJune 30, 2015, respectively.

In addition, the Company granted 54,329 shares of restricted stock to certain members of executive management that have both performance and service conditions that affect vesting. The performance condition was based on achieving an EPS target for fiscal year 2016 and, if this target is met, the restricted stock will vest over a three-year service period. The grant date fair value of the awards was $1.7 million. For the three and six months endedJune 30, 2016, the Company recognized $0.1 million and $0.3 million, respectively, in stock-based compensation expense related to these performance-based restricted stock grants, compared to $0.1 million and $0.2 million for the three and six months endedJune 30, 2015, respectively.

Performance Stock Units

The Company grants members of its executive management committee performance stock units that do not vest unless the Company achieves a specified cumulative EPS target over a three-year performance period. The number of shares issued will vary based on the cumulative EPS target that is achieved. The Company estimates the cost of performance stock units based upon the grant date fair value and expected vesting percentage over the three-year performance period. For the three and six months endedJune 30, 2016, the Company recognized $1.2 million and $2.3 million, respectively, in stock-based compensation expense related to these performance stock units, compared to $1.0 million and $2.0 million for the three and six months endedJune 30, 2015, respectively.

The three-year performance period for the 2013 grant ended on December 31, 2015, and the Company's cumulative EPS for the performance period exceeded the level required for a maximum award under the terms of the grant. As a result on February 17, 2016, executive management committee members were granted 308,400 of fully vested common shares.

As of June 30, 2016, outstanding performance stock unit grants made in 2014 and 2015 are expected to pay out at the maximum award amount, which is equivalent to 409,800 common shares with a grant date fair value of $10.4 million. In January 2016, performance stock units were granted to executive management committee members with cumulative target

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awards equivalent to 109,704 shares of common stock. Assuming a 100% vesting percentage for the 2016 performance stock units, the grant date fair value of the awards was $3.4 million.

Stock Options

The Company's stock option awards consist of those awards assumed as part of the Bridge acquisition. During the three and six months endedJune 30, 2016, the Company recognized $0.2 million and $0.4 million, respectively, in compensation expense related to these awards. There were no stock option awards granted by the Company during the three and six months endedJune 30, 2016 and 2015.

Treasury Shares

Treasury shares represent shares surrendered to the Company equal in value to the statutory payroll tax withholding obligations arising from the vesting of employee restricted stock awards. During the three and six months endedJune 30, 2016, the Company purchased treasury shares of 2,735 and 293,167, respectively, at a weighted average price of $35.20 and $31.09 per share, respectively. During the three and six months endedJune 30, 2015, the Company purchased treasury shares of 1,888 and 254,781, respectively, at a weighted average price of $31.11 and $27.27 per share, respectively.

8. ACCUMULATED OTHER COMPREHENSIVE INCOME

The following table summarizes the changes in accumulated other comprehensive income by component, net of tax, for the periods indicated: 

	Three Months Ended June 30,
	Unrealized holding gains (losses) on AFS			Unrealized holding gains (losses) on SERP		Unrealized holding gains (losses) on junior subordinated debt			Impairment loss on securities		Total
	(in thousands)
Balance, March 31, 2016	$	20,301		$	96	$	12,792		$	144	$	33,333
Other comprehensive income (loss) before reclassifications	12,712			6		575			—		13,293
Amounts reclassified from accumulated other comprehensive income	—			—		—			—		—
Net current-period other comprehensive income (loss)	12,712			6		575			—		13,293
Balance, June 30, 2016	$	33,013		$	102	$	13,367		$	144	$	46,626
Balance, March 31, 2015	$	23,279		$	—	$	16,115		$	144	$	39,538
SERP assumed in Bridge acquisition	—			337		—			—		337
Other comprehensive (loss) income before reclassifications	(8,378		)	—		(4,756		)	—		(13,134		)
Amounts reclassified from accumulated other comprehensive income	(34		)	—		—			—		(34		)
Net current-period other comprehensive (loss) income	(8,412		)	337		(4,756		)	—		(12,831		)
Balance, June 30, 2015	$	14,867		$	337	$	11,359		$	144	$	26,707

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	Six Months Ended June 30,
	Unrealized holding gains (losses) on AFS			Unrealized holding gains (losses) on SERP		Unrealized holding gains (losses) on junior subordinated debt			Impairment loss on securities		Total
	(in thousands)
Balance, December 31, 2015	$	9,993		$	90	$	12,033		$	144	$	22,260
Other comprehensive income (loss) before reclassifications	23,731			12		1,334			—		25,077
Amounts reclassified from accumulated other comprehensive income	(711		)	—		—			—		(711		)
Net current-period other comprehensive income (loss)	23,020			12		1,334			—		24,366
Balance, June 30, 2016	$	33,013		$	102	$	13,367		$	144	$	46,626
Balance, January 1, 2015	$	16,495		$	—	$	16,309		$	144	$	32,948
SERP assumed in Bridge acquisition	—			337		—			—		337
Other comprehensive (loss) income before reclassifications	(1,225		)	—		(4,950		)	—		(6,175		)
Amounts reclassified from accumulated other comprehensive income	(403		)	—		—			—		(403		)
Net current-period other comprehensive (loss) income	(1,628		)	337		(4,950		)	—		(6,241		)
Balance, June 30, 2015	$	14,867		$	337	$	11,359		$	144	$	26,707

The following table presents reclassifications out of accumulated other comprehensive income: 

	Three Months Ended June 30,					Six Months Ended June 30,
Income Statement Classification	2016		2015			2016			2015
	(in thousands)
Gain (loss) on sales of investment securities, net	$	—	$	55		$	1,001		$	644
Income tax (expense) benefit	—		(21		)	(290		)	(241		)
Net of tax	$	—	$	34		$	711		$	403

9. DERIVATIVES AND HEDGING ACTIVITIES

The Company is a party to various derivative instruments. Derivative instruments are contracts between two or more parties that have a notional amount and an underlying variable, require a small or no initial investment, and allow for the net settlement of positions. A derivative’s notional amount serves as the basis for the payment provision of the contract and takes the form of units, such as shares or dollars. A derivative’s underlying variable is a specified interest rate, security price, commodity price, foreign exchange rate, index, or other variable. The interaction between the notional amount and the underlying variable determines the number of units to be exchanged between the parties and influences the fair value of the derivative contract.

The primary type of derivatives that the Company uses are interest rate swaps. Generally, these instruments are used to help manage the Company's exposure to interest rate risk and meet client financing and hedging needs.

Derivatives are recorded at fair value in the Consolidated Balance Sheets, after taking into account the effects of bilateral collateral and master netting agreements. These agreements allow the Company to settle all derivative contracts held with the same counterparty on a net basis, and to offset net derivative positions with related cash collateral, where applicable.

As of June 30, 2016, December 31, 2015, and June 30, 2015, the Company does not have any significant outstanding cash flow hedges or free-standing derivatives.

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Derivatives Designated in Hedge Relationships

The Company utilizes derivatives that have been designated as part of a hedge relationship in accordance with the applicable accounting guidance to minimize the exposure to changes in benchmark interest rates and volatility of net interest income and EVE to interest rate fluctuations. The primary derivative instruments used to manage interest rate risk are interest rate swaps, which convert the contractual interest rate index of agreed-upon amounts of assets and liabilities (i.e., notional amounts) to another interest rate index.

The Company has entered into pay fixed/receive variable interest rate swaps designated as fair value hedges of certain fixed rate loans. As a result, the Company receives variable-rate interest payments in exchange for making fixed-rate payments over the lives of the contracts without exchanging the notional amounts.

The Company has also entered into pay variable/receive fixed interest rate swaps, designated as fair value hedges on its fixed rate subordinated debt offerings. As a result, the Company is paying a floating rate of three month LIBOR plus 3.16% and is receiving semi-annual fixed payments of 5.00% to match the payments on the $150.0 million subordinated debt. For the fair value hedge on the Company's subordinated debentures issued on June 16, 2016, the Company is paying a floating rate of three month LIBOR plus 3.25% and is receiving quarterly fixed payments of 6.25% to match the payments on the debt.

Fair Values, Volume of Activity, and Gain/Loss Information Related to Derivative Instruments

The following table summarizes the fair values of the Company's derivative instruments on a gross and net basis as of June 30, 2016, December 31, 2015, and June 30, 2015. The change in the notional amounts of these derivatives from December 31, 2015 to June 30, 2016 indicates the volume of the Company's derivative transaction activity during these periods. The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements. Total derivative assets and liabilities are adjusted to take into account the impact of legally enforceable master netting agreements that allow the Company to settle all derivative contracts with the same counterparty on a net basis and to offset the net derivative position with the related collateral. Where master netting agreements are not in effect or are not enforceable under bankruptcy laws, the Company does not adjust those derivative amounts with counterparties. The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in other assets or other liabilities in the Consolidated Balance Sheets, as indicated in the following table:

	June 30, 2016						December 31, 2015						June 30, 2015
			Fair Value						Fair Value						Fair Value
	Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities
	(in thousands)
Derivatives designated as hedging instruments:
Fair value hedges
Interest rate swaps	$	970,382	$	7,757	$	107,097	$	800,478	$	3,569	$	64,785	$	828,036	$	198	$	49,037
Total	970,382		7,757		107,097		800,478		3,569		64,785		828,036		198		49,037
Netting adjustments (1)	—		—		—		—		—		—		—		—		—
Net derivatives in the balance sheet	$	970,382	$	7,757	$	107,097	$	800,478	$	3,569	$	64,785	$	828,036	$	198	$	49,037

(1) Netting adjustments represent the amounts recorded to convert derivative balances from a gross basis to a net basis in accordance with the applicable accounting guidance.

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Fair value hedges

An assessment of effectiveness is performed at initiation of a hedge and on a quarterly basis thereafter. All of the Company's fair value hedges remained “highly effective” as of June 30, 2016, December 31, 2015, and June 30, 2015.

The following table summarizes the gains (losses) on fair value hedges for the three and six months endedJune 30, 2016 and 2015, all of which are recorded in other non-interest income.

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Hedge of Fixed Rate Loans (1)
Loss on "pay fixed" swap	$	(18,115	)	$	24,003		$	(42,312	)	$	8,773
Gain on receive fixed rate loans	18,122			(23,988		)	42,319			(8,752		)
Net ineffectiveness	$	7		$	15		$	7		$	21
Hedge of Fixed Rate Subordinated Debt Issuances (1)
Gain on "receive fixed" swap	$	3,024		$	198		$	4,189		$	198
Loss on subordinated debt	(3,024		)	(198		)	(4,189		)	(198		)
Net ineffectiveness	$	—		$	—		$	—		$	—

(1) The fair value of derivatives contracts are carried as other assets and other liabilities in the Consolidated Balance Sheets. The effective portion of hedging gains (losses) is recorded as basis adjustments to the underlying hedged asset or liability. Gains and losses on both the hedging derivative and hedged item are recorded through non-interest income with a resulting net income impact for the amount of ineffectiveness.

Counterparty Credit Risk

Like other financial instruments, derivatives contain an element of credit risk. This risk is measured as the expected positive replacement value of the contracts. Management generally enters into bilateral collateral and master netting agreements that provide for the net settlement of all contracts with the same counterparty. Additionally, management monitors counterparty credit risk exposure on each contract to determine appropriate limits on the Company's total credit exposure across all product types. In general, the Company has a zero credit threshold with regard to derivative exposure with counterparties. Management reviews the Company's collateral positions on a daily basis and exchanges collateral with counterparties in accordance with standard ISDA documentation and other related agreements. The Company generally posts collateral in the form of highly rated securities issued by the U.S. Treasury or government-sponsored enterprises, such as GNMA, FNMA, and FHLMC. The total collateral posted by the Company for derivatives in a net liability position totaled $107.1 million at June 30, 2016, $61.7 million at December 31, 2015, and $46.7 million at June 30, 2015.

The following table summarizes the Company's largest exposure to an individual counterparty at the dates indicated for derivatives in net asset positions:

	June 30, 2016		December 31, 2015		June 30, 2015
	(in thousands)
Largest gross exposure (derivative asset) to an individual counterparty	$	7,556	$	3,569	$	198
Collateral posted by this counterparty	7,680		4,680		—
Derivative liability with this counterparty	—		—		—
Collateral pledged to this counterparty	—		1,340		—
Net exposure after netting adjustments and collateral	$	—	$	229	$	198

Credit Risk Contingent Features

Management has entered into certain derivative contracts that require the Company to post collateral to the counterparties when these contracts are in a net liability position. Conversely, the counterparties may post collateral when these contracts are in a net asset position. The amount of collateral to be posted is based on the amount of the net liability and exposure thresholds. As of June 30, 2016, December 31, 2015, and June 30, 2015 the aggregate fair value of all derivative contracts with credit risk contingent features (i.e., those containing collateral posting provisions) held by the Company that were in a net liability position totaled $107.1 million, $64.8 million, and $49.0 million, respectively. As of June 30, 2016, the Company was in an over-collateralized net position of $28.7 million after considering $135.8 million of collateral held in the form of securities. As of December 31, 2015 and June 30, 2015, the Company was in an over-collateralized position of $15.5 million and $18.0 million, respectively.

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10. EARNINGS PER SHARE

Diluted EPS is based on the weighted average outstanding common shares during each period, including common stock equivalents. Basic EPS is based on the weighted average outstanding common shares during the period.

The following table presents the calculation of basic and diluted EPS: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands, except per share amounts)
Weighted average shares - basic	102,688		88,177		102,294		88,059
Dilutive effect of stock awards	784		505		713		508
Weighted average shares - diluted	103,472		88,682		103,007		88,567
Net income available to common stockholders	$	61,614	$	39,228	$	122,946	$	79,435
Earnings per share - basic	0.60		0.44		1.20		0.90
Earnings per share - diluted	0.60		0.44		1.19		0.90

The Company had no anti-dilutive stock options outstanding at each of the periods ended June 30, 2016 and 2015.

11. INCOME TAXES

The effective tax rate was 29.94% and 25.59% for the three months endedJune 30, 2016 and 2015, respectively. For the six months endedJune 30, 2016 and 2015, the Company's effective tax rate was 27.16% and 25.83%, respectively. The increase in the effective tax rate for the six months endedJune 30, 2016 is due primarily to an increase in projected pre-tax book income without corresponding tax deductible items.

Deferred tax assets and liabilities are included in the Consolidated Financial Statements at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be reversed. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.

For the six months endedJune 30, 2016, the net deferred tax assets decreased$21.1 million to $65.3 million. This overall decrease in the net deferred tax asset was primarily the result of decreases to deferred tax assets from a change in fair market value of junior subordinated debt and AFS securities, expected use of AMT credit carryovers, vesting of stock-based compensation awards, and fair market value adjustments related to acquired loans.

Although realization is not assured, the Company believes that the realization of the recognized deferred tax asset of $65.3 million at June 30, 2016 is more-likely-than-not based on expectations as to future taxable income and based on available tax planning strategies within the meaning of ASC 740, Income Taxes, that could be implemented if necessary to prevent a carryover from expiring.

At each of the periods ended June 30, 2016 and December 31, 2015, the Company had no deferred tax valuation allowance.

The deferred tax asset related to federal and state NOL carryovers outstanding at June 30, 2016 and December 31, 2015 available to reduce the tax liability in future years totaled $9.2 million and $9.3 million, respectively. The respective $9.2 million and $9.3 million of tax benefits relate entirely to federal NOL carryovers (subject to an annual limitation imposed by IRC Section 382). The Company’s ability to use federal NOL carryovers, as well as its ability to use certain future tax deductions called NUBILs associated with the Company's acquisitions is subject to annual limitations. In management’s opinion, it is more-likely-than-not that the results of future operations will generate sufficient taxable income to realize all of the deferred tax benefits related to these NOL carryovers and NUBILs.

At each of the periods ended June 30, 2016 and December 31, 2015, the total amount of unrecognized tax benefits, net of associated deferred tax benefit, that would impact the effective tax rate, if recognized, was $0.7 million.

Interest and penalties related to unrecognized tax benefits are recognized as part of the provision for income taxes. During each of the three and six months endedJune 30, 2016 and 2015, the Company recognized no amounts for penalties associated with unrecognized tax benefits and no amounts for interest.

At each of the periods ended June 30, 2016 and December 31, 2015, the Company has accrued a $0.1 million liability for penalties and a $0.1 million liability for interest.

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Investments in LIHTC

The Company invests in LIHTC funds that are designed to generate a return primarily through the realization of federal tax credits.

Investments in LIHTC and unfunded LIHTC obligations are included as part of other assets and other liabilities, respectively, in the Consolidated Balance Sheets and total $171.5 million and $70.4 million, respectively, as of June 30, 2016, compared to $152.7 million and $61.2 million as of December 31, 2015. For the three months endedJune 30, 2016 and 2015, $3.8 million and $2.2 million of amortization related to LIHTC investments was recognized as a component of income tax expense, respectively. For the six months endedJune 30, 2016 and 2015, $8.2 million and $5.6 million of amortization related to LIHTC investments was recognized as a component of income tax expense, respectively.

12. COMMITMENTS AND CONTINGENCIES

Unfunded Commitments and Letters of Credit

The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. They involve, to varying degrees, elements of credit risk in excess of amounts recognized in the Consolidated Balance Sheets.

Lines of credit are obligations to lend money to a borrower. Credit risk arises when the borrower's current financial condition may indicate less ability to pay than when the commitment was originally made. In the case of standby letters of credit, the risk arises from the potential failure of the customer to perform according to the terms of a contract. In such a situation, the third party might draw on the standby letter of credit to pay for completion of the contract and the Company would look to its customer to repay these funds with interest. To minimize the risk, the Company uses the same credit policies in making commitments and conditional obligations as it would for a loan to that customer.

Standby letters of credit and financial guarantees are commitments issued by the Company to guarantee the performance of a customer to a third party in borrowing arrangements. The Company generally has recourse to recover from the customer any amounts paid under the guarantees. Typically, letters of credit issued have expiration dates within one year.

A summary of the contractual amounts for unfunded commitments and letters of credit are as follows: 

	June 30, 2016		December 31, 2015
	(in thousands)
Commitments to extend credit, including unsecured loan commitments of $353,644 at June 30, 2016 and $341,374 at December 31, 2015	$	3,895,885	$	3,624,578
Credit card commitments and financial guarantees	54,270		57,966
Standby letters of credit, including unsecured letters of credit of $10,380 at June 30, 2016 and $4,257 at December 31, 2015	53,448		50,659
Total	$	4,003,603	$	3,733,203

Commitments to extend credit are agreements to lend to a customer provided that there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral.

The Company has exposure to credit losses from unfunded commitments and letters of credit. As funds have not been disbursed on these commitments, they are not reported as loans outstanding. Credit losses related to these commitments are not included in the allowance for credit losses reported in "Note 3. Loans, Leases and Allowance for Credit Losses" of these Consolidated Financial Statements and are accounted for as a separate loss contingency. This loss contingency for unfunded loan commitments and letters of credit was $10.8 million(including $7.0 million related to loans acquired in the GE asset purchase)and $3.3 million as of June 30, 2016 and December 31, 2015, respectively. Changes to this liability are adjusted through non-interest expense.

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Concentrations of Lending Activities

The Company’s lending activities are driven in large part by the customers served in the market areas where the Company has branch offices in the states of Arizona, Nevada, and California. Despite the geographic concentration of lending activities, the Company does not have a single external customer from which it derives 10% or more of its revenues. The Company monitors concentrations within four broad categories: geography, industry, product, and collateral. The Company's loan portfolio includes significant credit exposure to the CRE market. As of the periods ended June 30, 2016 and December 31, 2015, CRE related loans accounted for approximately 54% and 49% of total loans, respectively. Substantially all of these loans are secured by first liens with an initial loan to value ratio of generally not more than 75%. Approximately 36% and 48% of these CRE loans, excluding construction and land loans, were owner-occupied at June 30, 2016 and December 31, 2015, respectively.

Contingencies

The Company is involved in various lawsuits of a routine nature that are being handled and defended in the ordinary course of the Company’s business. Expenses are being incurred in connection with these lawsuits, but in the opinion of management, based in part on consultation with outside legal counsel, the resolution of these lawsuits and associated defense costs will not have a material impact on the Company’s financial position, results of operations, or cash flows.

Lease Commitments

The Company leases the majority of its office locations and many of these leases contain multiple renewal options and provisions for increased rents. Total rent expense of $2.8 million and $1.6 million for three months endedJune 30, 2016 and 2015, respectively, was included in occupancy expense. For the six months endedJune 30, 2016 and 2015, total rent expense was $5.3 million and $3.2 million, respectively.

13. FAIR VALUE ACCOUNTING

The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC 825 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under ASC 825 are described in "Note 1. Summary of Significant Accounting Policies" of these Notes to Unaudited Consolidated Financial Statements.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Furthermore, the reported fair value amounts have not been comprehensively revalued since the presentation dates, and therefore, estimates of fair value after the balance sheet date may differ significantly from the amounts presented herein. A more detailed description of the valuation methodologies used for assets and liabilities measured at fair value is set forth below. Transfers between levels in the fair value hierarchy are recognized as of the end of the month following the event or change in circumstances that caused the transfer.

Under ASC 825, the Company elected the FVO treatment for certain junior subordinated debt issuances. This election is irrevocable and results in the recognition of unrealized gains and losses on these items in earnings at each reporting date.

All securities for which the fair value measurement option had been elected are included in a separate line item in the Consolidated Balance Sheets as securities measured at fair value.

45

For the three and six months endedJune 30, 2016 and 2015 gains and losses from fair value changes were as follows:

	Changes in Fair Values for Items Measured at Fair Value Pursuant to Election of the Fair Value Option
	Unrealized Gain/(Loss) on Assets and Liabilities Measured at Fair Value, Net			Interest Income on Securities		Interest Expense on Junior Subordinated Debt		Total Changes Included in Current-Period Earnings			Total Changes Included in OCI, Net of Tax
	(in thousands)
Three Months Ended June 30, 2016
Securities measured at fair value	$	(1	)	$	—	$	—	$	(1	)	$	—
Junior subordinated debt	1,006			—		693		693			575
Total	$	1,005		$	—	$	693	$	692		$	575
Six Months Ended June 30, 2016
Securities measured at fair value	$	(6	)	$	—	$	—	$	(6	)	$	—
Junior subordinated debt	2,218			—		1,373		1,373			1,334
Total	$	2,212		$	—	$	1,373	$	1,367		$	1,334
Three Months Ended June 30, 2015
Securities measured at fair value	$	(9	)	$	1	$	—	$	(8	)	$	—
Junior subordinated debt	(7,736		)	—		451		451			(4,756		)
Total	$	(7,745	)	$	1	$	451	$	443		$	(4,756	)
Six Months Ended June 30, 2015
Securities measured at fair value	$	(14	)	$	1	$	—	$	(13	)	$	—
Junior subordinated debt	(8,045		)	—		892		892			(4,950		)
Total	$	(8,059	)	$	1	$	892	$	879		$	(4,950	)

There were no net gains or losses recognized during the three and six months endedJune 30, 2016 and 2015 on trading securities sold during the period.

Interest income on securities measured at fair value is accounted for similarly to those classified as AFS. Any premiums or discounts are recognized in interest income over the term of the securities. For MBS, estimates of prepayments are considered in the constant yield calculations. Interest expense on junior subordinated debt is also determined under a constant yield calculation.

Fair value on a recurring basis

Financial assets and financial liabilities measured at fair value on a recurring basis include the following:

Securities measured at fair value: All of the Company’s securities measured at fair value, which consist of MBS, are reported at fair value utilizing Level 2 inputs in the same manner as described below for AFS securities.

AFS securities: CRA investments, preferred stock, and U.S. treasury securities are reported at fair value utilizing Level 1 inputs. With the exception of CDO securities, other securities classified as AFS are reported at fair value utilizing Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information, and the bond’s terms and conditions, among other things. The Company estimates the fair value of CDO securities utilizing Level 3 inputs, which include pricing indications from comparable securities.

Independent pricing service: The Company's independent pricing service provides pricing information on Level 1, 2, and 3 securities, and represents the pricing source for the majority of the portfolio. Management independently evaluates the fair value measurements received from the Company's third party pricing service through multiple review steps. First, management reviews what has transpired in the marketplace with respect to interest rates, credit spreads, volatility, and mortgage rates, among other things, and develops an expectation of changes to the securities' valuations from the previous quarter. Then, management obtains market values from additional sources. The pricing service provides management with observable market data including interest rate curves and mortgage prepayment speed grids, as well as dealer quote sheets, new bond offering sheets, and historical trade documentation. Management reviews the assumptions and decides whether they are reasonable. Management may compare interest rates, credit spreads, and prepayments speeds used as part of the assumptions to those that management believes are reasonable. Management may price securities using the provided assumptions to determine whether

46

they can develop similar prices on like securities. Any discrepancies between management’s review and the prices provided by the vendor are discussed with the vendor and the Company’s other valuation advisors. Lastly, management selects a sample of investment securities and compares the values provided by its primary third party pricing service to the market values obtained from secondary sources and evaluates those with notable variances.

Annually, the Company receives an SSAE 16 report from its independent pricing service attesting to the controls placed on the operations of the service from its auditor.

Interest rate swaps: Interest rate swaps are reported at fair value utilizing Level 2 inputs. The Company obtains dealer quotations to value its interest rate swaps.

Junior subordinated debt: The Company estimates the fair value of its junior subordinated debt using a discounted cash flow model which incorporates the effect of the Company’s own credit risk in the fair value of the liabilities (Level 3). The Company’s cash flow assumptions are based on contractual cash flows as the Company anticipates that it will pay the debt according to its contractual terms.

As of June 30, 2016, the Company estimated the discount rate at 6.16%, which represents an implied credit spread of 5.51% plus three-month LIBOR (0.65%). As of December 31, 2015, the Company estimated the discount rate at 5.67%, which was a 5.06% credit spread plus three-month LIBOR (0.61%).

The fair value of assets and liabilities measured at fair value on a recurring basis was determined using the following inputs as of the periods presented: 

	Fair Value Measurements at the End of the Reporting Period Using:
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(in thousands)
June 30, 2016
Assets:
Measured at fair value
Residential MBS issued by GSEs	$	—	$	1,326	$	—	$	1,326
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	10,183	$	10,183
Commercial MBS issued by GSEs	—		44,498		—		44,498
Corporate debt securities	—		8,362		—		8,362
CRA investments	35,383		—		—		35,383
Municipal obligations	—		346,761		—		346,761
Preferred stock	109,276		—		—		109,276
Private label commercial MBS	—		3,721		—		3,721
Private label residential MBS	—		339,355		—		339,355
Residential MBS issued by GSEs	—		1,207,745		—		1,207,745
Trust preferred securities	—		23,701		—		23,701
U.S. government sponsored agency securities	—		34,003		—		34,003
U.S. treasury securities	2,551		—		—		2,551
Total AFS securities	$	147,210	$	2,008,146	$	10,183	$	2,165,539
Loans - HFS	$	—	$	22,336	$	—	$	22,336
Derivative assets (1)	—		7,757		—		7,757
Liabilities:
Junior subordinated debt (2)	$	—	$	—	$	44,710	$	44,710
Derivative liabilities (1)	—		107,097		—		107,097

(1) Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a net positive value of $106,503 and the net carrying value of subordinated debt includes a net negative value of $7,757 as of June 30, 2016, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

(2) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

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	Fair Value Measurements at the End of the Reporting Period Using:
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(in thousands)
December 31, 2015
Assets:
Measured at fair value
Residential MBS issued by GSEs	$	—	$	1,481	$	—	$	1,481
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	10,060	$	10,060
Commercial MBS issued by GSEs	—		19,114		—		19,114
Corporate debt securities	—		13,251		—		13,251
CRA investments	34,685		—		—		34,685
Municipal obligations	—		334,830		—		334,830
Preferred stock	111,236		—		—		111,236
Private label commercial MBS	—		4,691		—		4,691
Private label residential MBS	—		257,128		—		257,128
Residential MBS issued by GSEs	—		1,170,221		—		1,170,221
Trust preferred securities	—		24,314		—		24,314
U.S. treasury securities	2,993		—		—		2,993
Total AFS securities	$	148,914	$	1,823,549	$	10,060	$	1,982,523
Loans - HFS	$	—	$	23,809	$	—	$	23,809
Derivative assets (1)	—		3,569		—		3,569
Liabilities:
Junior subordinated debt (2)	$	—	$	—	$	46,928	$	46,928
Derivative liabilities (1)	—		64,785		—		64,785

(1) Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a positive value of $64,184 and the net carrying value of subordinated debt includes a net negative value of $3,569 as of December 31, 2015, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

(2) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

For the three and six months endedJune 30, 2016 and 2015, the change in Level 3 assets and liabilities measured at fair value on a recurring basis was as follows: 

	Junior Subordinated Debt
	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Beginning balance	$	(45,716	)	$	(40,746	)	$	(46,928	)	$	(40,437	)
Transfers into Level 3	—			—			—			—
Total gains (losses) for the period
Included in other comprehensive income (1)	1,006			(7,736		)	$	2,218		$	(8,045	)
Ending balance	$	(44,710	)	$	(48,482	)	$	(44,710	)	$	(48,482	)

(1)     Due to the Company's election to early adopt an element of ASU 2016-01, changes in the fair value of junior subordinated debt are presented as part

of OCI rather than earnings effective January 1, 2015. Accordingly, total losses are included in the other comprehensive income line, Unrealized gain (loss) on junior subordinated debt, which is net of tax. The above amount represents the gross loss from changes in fair value of junior subordinated debt.

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	CDO Securities
	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Beginning balance	$	9,076	$	10,520	$	10,060	$	11,445
Transfers into Level 3	—		—		—		—
Total gains (losses) for the period
Included in other comprehensive income (1)	1,107		284		123		(641		)
Ending balance	$	10,183	$	10,804	$	10,183	$	10,804

(1) Total gains (losses) for the period are included in the other comprehensive income line, Unrealized gain (loss) on AFS securities.

For Level 3 liabilities and assets measured at fair value on a recurring basis as of June 30, 2016 and December 31, 2015, the significant unobservable inputs used in the fair value measurements were as follows: 

	June 30, 2016		Valuation Technique	Significant Unobservable Inputs	Input Value
	(in thousands)
Junior subordinated debt	$	44,710	Discounted cash flow	Implied credit rating of the Company	6.16	%
CDO securities	10,183		S&P Model	Pricing indications from comparable securities

	December 31, 2015		Valuation Technique	Significant Unobservable Inputs	Input Value
	(in thousands)
Junior subordinated debt	$	46,928	Discounted cash flow	Adjusted Corporate Bond over Treasury Index with comparable credit spread	5.67	%
CDO securities	10,060		S&P Model	Pricing indications from comparable securities

The significant unobservable inputs used in the fair value measurement of the Company’s junior subordinated debt as of June 30, 2016 was the implied credit risk for the Company, calculated as the difference between the 20-year 'BB' rated financial index over the corresponding swap index.

The significant unobservable inputs used in the fair value measurement of the Company's CDO securities include securities terms, conditions, and underlying collateral type, as well as trustee and servicer reports, trade data on comparable securities, and market quotes that are converted into spreads to benchmark LIBOR curves. Significant increases or decreases in these inputs could result in significantly different fair value measurements.

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Fair value on a nonrecurring basis

Certain assets are measured at fair value on a nonrecurring basis. That is, the assets are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table presents such assets carried on the balance sheet by caption and by level within the ASC 825 hierarchy:

	Fair Value Measurements at the End of the Reporting Period Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Active Markets for Similar Assets (Level 2)		Unobservable Inputs (Level 3)
	(in thousands)
As of June 30, 2016:
Impaired loans with specific valuation allowance	$	14,300	$	—	$	—	$	14,300
Impaired loans without specific valuation allowance (1)	61,869		—		—		61,869
Other assets acquired through foreclosure	49,842		—		—		49,842
As of December 31, 2015:
Impaired loans with specific valuation allowance	$	19,629	$	—	$	—	$	19,629
Impaired loans without specific valuation allowance (1)	66,754		—		—		66,754
Other assets acquired through foreclosure	43,942		—		—		43,942

(1) Excludes loan balances with charge-offs of $33.9 million and $37.8 million as of June 30, 2016 and December 31, 2015, respectively.

For Level 3 assets measured at fair value on a nonrecurring basis as of June 30, 2016 and December 31, 2015, the significant unobservable inputs used in the fair value measurements were as follows: 

	June 30, 2016		Valuation Technique(s)		Significant Unobservable Inputs	Range
	(in thousands)
Impaired loans	$	76,169	Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%
			Discounted cash flow method	Discount rate	Contractual loan rate	4.0% to 7.0%
				Scheduled cash collections	Loss given default	0% to 20.0%
				Proceeds from non-real estate collateral	Loss given default	0% to 70.0%
Other assets acquired through foreclosure	49,842		Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%

	December 31, 2015		Valuation Technique(s)		Significant Unobservable Inputs	Range
	(in thousands)
Impaired loans	$	86,383	Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%
			Discounted cash flow method	Discount rate	Contractual loan rate	4.0% to 7.0%
				Scheduled cash collections	Loss given default	0% to 20.0%
				Proceeds from non-real estate collateral	Loss given default	0% to 70.0%
Other assets acquired through foreclosure	43,942		Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%

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Impaired loans: The specific reserves for collateral dependent impaired loans are based on collateral value, net of estimated disposition costs and other identified quantitative inputs. Collateral value is determined based on independent third-party appraisals or internally-developed discounted cash flow analyses. Appraisals may utilize a single valuation approach or a combination of approaches, including comparable sales and the income approach. Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. In addition, when adjustments are made to an appraised value to reflect various factors such as the age of the appraisal or known changes in the market or the collateral, such valuation inputs are considered unobservable and the fair value measurement is categorized as a Level 3 measurement. Internal discounted cash flow analyses are also utilized to estimate the fair value of impaired loans, which considers internally-developed, unobservable inputs such as discount rates, default rates, and loss severity.

Total Level 3 impaired loans had an estimated fair value of $76.2 million and $86.4 million at June 30, 2016 and December 31, 2015, respectively. Impaired loans with a specific valuation allowance had a gross estimated fair value of $20.7 million and $24.3 million at June 30, 2016 and December 31, 2015, respectively, which was reduced by a specific valuation allowance of $6.4 million and $4.7 million, respectively.

Other assets acquired through foreclosure: Other assets acquired through foreclosure consist of properties acquired as a result of, or in-lieu-of, foreclosure. These assets are initially reported at the fair value determined by independent third-party appraisals using appraised value less estimated cost to sell. Such properties are generally re-appraised every twelve months. There is risk for subsequent volatility. Costs relating to the development or improvement of the assets are capitalized and costs relating to holding the assets are charged to expense.

Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. In addition, when significant adjustments are based on unobservable inputs, such as when a current appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value and there is no observable market price, the resulting fair value measurement has been categorized as a Level 3 measurement. The Company had $49.8 million and $43.9 million of such assets at June 30, 2016 and December 31, 2015, respectively.

Credit vs. non-credit losses

Under the provisions of ASC 320, Investments-Debt and Equity Securities, OTTI is separated into the amount of total impairment related to the credit loss and the amount of the total impairment related to all other factors. The amount of the total OTTI related to the credit loss is recognized in earnings. The amount of the total impairment related to all other factors is recognized in OCI.

For the three and six months endedJune 30, 2016 and 2015, the Company determined that no securities experienced credit losses.

There is no OTTI balance recognized in comprehensive income as of June 30, 2016 and 2015.

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FAIR VALUE OF FINANCIAL INSTRUMENTS

The estimated fair value of the Company’s financial instruments is as follows: 

	June 30, 2016
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Investment securities:
HTM	$	36,929	$	—	$	41,162	$	—	$	41,162
AFS	2,165,539		147,210		2,008,146		10,183		2,165,539
Trading	1,326		—		1,326		—		1,326
Derivative assets	7,757		—		7,757		—		7,757
Loans, net	12,755,743		—		12,536,447		76,169		12,612,616
Accrued interest receivable	60,432		—		60,432		—		60,432
Financial liabilities:
Deposits	$	14,201,357	$	—	$	14,205,415	$	—	$	14,205,415
Customer repurchases	38,492		—		38,492		—		38,492
Qualifying debt	382,103		—		—		372,447		372,447
Derivative liabilities	107,097		—		107,097		—		107,097
Accrued interest payable	14,368		—		14,368		—		14,368

	December 31, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Investment securities:
AFS	$	1,982,523	$	148,914	$	1,823,549	$	10,060	$	1,982,523
Trading	1,481		—		1,481		—		1,481
Derivative assets	3,569		—		3,569		—		3,569
Loans, net	11,017,595		—		10,766,826		86,383		10,853,209
Accrued interest receivable	54,445		—		54,445		—		54,445
Financial liabilities:
Deposits	$	12,030,624	$	—	$	12,034,199	$	—	$	12,034,199
Customer repurchases	38,155		—		38,155		—		38,155
FHLB advances	150,000		—		150,000		—		150,000
Qualifying debt	210,328		—		—		207,437		207,437
Derivative liabilities	64,785		—		64,785		—		64,785
Accrued interest payable	13,626		—		13,626		—		13,626

Interest rate risk

The Company assumes interest rate risk (the risk to the Company’s earnings and capital from changes in interest rate levels) as a result of its normal operations. As a result, the fair values of the Company’s financial instruments as well as its future net interest income will change when interest rate levels change and that change may be either favorable or unfavorable to the Company.

Interest rate risk exposure is measured using interest rate sensitivity analysis to determine the Company's change in EVE and net interest income resulting from hypothetical changes in interest rates. If potential changes to EVE and net interest income resulting from hypothetical interest rate changes are not within the limits established by the BOD, the BOD may direct management to adjust the asset and liability mix to bring interest rate risk within BOD-approved limits. As of June 30, 2016, the Company’s interest rate risk profile was within BOD-approved limits.

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WAB has an ALCO charged with managing interest rate risk within the BOD-approved limits. Limits are structured to prohibit an interest rate risk profile that does not conform to both management and BOD risk tolerances. There is also ALCO reporting at the Parent company level for reviewing interest rate risk for the Company, which gets reported to the BOD and the Finance and Investment Committee.

Fair value of commitments

The estimated fair value of standby letters of credit outstanding at June 30, 2016 and December 31, 2015 was insignificant. Loan commitments on which the committed interest rates were less than the current market rate were also insignificant at June 30, 2016 and December 31, 2015.

14. SEGMENTS

The Company's reportable segments are aggregated based primarily on geographic location, services offered, and markets served. The Company's regional segments, which include Arizona, Nevada, Southern California, and Northern California, provide full service banking and related services to their respective markets. The operations from the regional segments correspond to the following banking divisions: ABA in Arizona, BON and FIB in Nevada, TPB in Southern California, and Bridge in Northern California.

The Company's NBL segments provide specialized banking services to niche markets. With the purchase of GE's domestic select-service hotel franchise loan portfolio on April 20, 2016, management has created a new operating segment called HFF, which is now included as one of the Company's NBL reportable segments. The Company's other NBL reportable segments include HOA Services, Public & Nonprofit Finance, Technology & Innovation, and Other NBLs. These NBLs are managed centrally and are broader in geographic scope than the Company's other segments, though still predominately located within the Company's core market areas. The HOA Services NBL corresponds to the AAB division. The newly created HFF NBL includes the hotel franchise loan portfolio purchased from GE. Public & Nonprofit Finance consists of the operations of Public and Nonprofit Finance. The Technology & Innovation NBL includes the operations of Equity Fund Resources, Life Sciences Group, Renewable Resource Group, and Technology Finance. The Other NBLs segment consists of Corporate Finance, Mortgage Warehouse Lending, and Resort Finance.

The Corporate & Other segment consists of corporate-related items, income and expense items not allocated to the Company's other reportable segments, and inter-segment eliminations.

The Company's segment reporting process begins with the assignment of all loan and deposit accounts directly to the segments where these products are originated and/or serviced. Equity capital is assigned to each segment based on the risk profile of their assets and liabilities. With the exception of goodwill, which is assigned a 100% weighting, equity capital allocations ranged from 0% to 12% during the year, with a funds credit provided for the use of this equity as a funding source. Any excess or deficient equity not allocated to segments based on risk is assigned to the Corporate & Other segment.

Net interest income, provision for credit losses, and non-interest expense amounts are recorded in their respective segment to the extent that the amounts are directly attributable to those segments. Net interest income is recorded in each segment on a TEB with a corresponding increase in income tax expense, which is eliminated in the Corporate & Other segment.

Further, net interest income of a reportable segment includes a funds transfer pricing process that matches assets and liabilities with similar interest rate sensitivity and maturity characteristics. Using this funds transfer pricing methodology, liquidity is transferred between users and providers. A net user of funds has lending/investing in excess of deposits/borrowings and a net provider of funds has deposits/borrowings in excess of lending/investing. A segment that is a user of funds is charged for the use of funds, while a provider of funds is credited through funds transfer pricing, which is determined based on the average life of the assets or liabilities in the portfolio.

Net income amounts for each reportable segment are further derived by the use of expense allocations. Certain expenses not directly attributable to a specific segment are allocated across all segments based on key metrics, such as number of employees, average loan balances, and average deposit balances. These types of expenses include information technology, operations, human resources, finance, risk management, credit administration, legal, and marketing.

Income taxes are applied to each segment based on the effective tax rate for the geographic location of the segment. Any difference in the corporate tax rate and the aggregate effective tax rates in the segments are adjusted in the Corporate & Other segment.

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The following is a summary of selected operating segment information for the periods indicated:

				Regional Segments
Balance Sheet:	Consolidated Company			Arizona			Nevada			Southern California			Northern California
At June 30, 2016	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	2,958.8		$	2.4		$	9.7		$	2.0		$	1.9
Loans, net of deferred loan fees and costs	12,877.8			2,897.6			1,727.0			1,801.2			1,139.5
Less: allowance for credit losses	(122.1		)	(30.9		)	(19.9		)	(19.5		)	(8.4		)
Total loans	12,755.7			2,866.7			1,707.1			1,781.7			1,131.1
Other assets acquired through foreclosure, net	49.8			7.3			21.0			—			0.3
Goodwill and other intangible assets, net	304.3			—			24.2			—			157.5
Other assets	660.2			44.3			60.3			16.4			14.1
Total assets	$	16,728.8		$	2,920.7		$	1,822.3		$	1,800.1		$	1,304.9
Liabilities:
Deposits	$	14,201.4		$	3,801.4		$	3,623.0		$	2,404.0		$	1,510.9
Borrowings and qualifying debt	382.1			—			—			—			—
Other liabilities	349.1			11.7			28.6			9.3			9.8
Total liabilities	14,932.6			3,813.1			3,651.6			2,413.3			1,520.7
Allocated equity:	1,796.2			337.6			248.3			205.8			287.2
Total liabilities and stockholders' equity	$	16,728.8		$	4,150.7		$	3,899.9		$	2,619.1		$	1,807.9
Excess funds provided (used)	—			1,230.0			2,077.6			819.0			503.0

Income Statement:
Three Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	163,686		$	41,204		$	33,464		$	25,803		$	21,896
Provision for (recovery of) credit losses	2,500			1,703			(1,704		)	220			926
Net interest income (expense) after provision for credit losses	161,186			39,501			35,168			25,583			20,970
Non-interest income	8,559			888			2,097			561			2,516
Non-interest expense	(81,804		)	(14,550		)	(14,824		)	(10,635		)	(13,481		)
Income (loss) before income taxes	87,941			25,839			22,441			15,509			10,005
Income tax expense (benefit)	26,327			10,137			7,855			6,522			4,206
Net income	$	61,614		$	15,702		$	14,586		$	8,987		$	5,799

Six Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	309,397		$	79,660		$	66,039		$	50,231		$	45,091
Provision for (recovery of) credit losses	5,000			8,476			(2,517		)	250			1,968
Net interest income (expense) after provision for credit losses	304,397			71,184			68,556			49,981			43,123
Non-interest income	21,692			4,569			4,156			1,221			4,942
Non-interest expense	(157,297		)	(29,006		)	(29,570		)	(21,869		)	(27,448		)
Income (loss) before income taxes	168,792			46,747			43,142			29,333			20,617
Income tax expense (benefit)	45,846			18,339			15,100			12,335			8,669
Net income	$	122,946		$	28,408		$	28,042		$	16,998		$	11,948

54

	National Business Lines
Balance Sheet:	HOA Services			HFF			Public & Nonprofit Finance			Technology & Innovation			Other NBL			Corporate & Other
At June 30, 2016	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	—		$	—		$	—		$	—		$	—		$	2,942.8
Loans, net of deferred loan fees and costs	98.3			1,262.8			1,481.4			943.5			1,498.6			27.9
Less: allowance for credit losses	(1.1		)	(0.1		)	(16.1		)	(9.6		)	(16.2		)	(0.3		)
Total loans	97.2			1,262.7			1,465.3			933.9			1,482.4			27.6
Other assets acquired through foreclosure, net	—			—			—			—			—			21.2
Goodwill and other intangible assets, net	—			0.2			—			122.4			—			—
Other assets	0.3			20.0			14.1			3.7			11.3			475.7
Total assets	$	97.5		$	1,282.9		$	1,479.4		$	1,060.0		$	1,493.7		$	3,467.3
Liabilities:
Deposits	$	1,711.3		$	—		$	—		$	963.0		$	—		$	187.8
Borrowings and qualifying debt	—			—			—			—			—			382.1
Other liabilities	1.4			15.0			105.5			—			36.4			131.4
Total liabilities	1,712.7			15.0			105.5			963.0			36.4			701.3
Allocated equity:	43.6			104.9			89.3			217.4			124.1			138.0
Total liabilities and stockholders' equity	$	1,756.3		$	119.9		$	194.8		$	1,180.4		$	160.5		$	839.3
Excess funds provided (used)	1,658.8			(1,163.0		)	(1,284.6		)	120.4			(1,333.2		)	(2,628.0		)

Income Statement:
Three Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	9,909		$	12,068		$	5,026		$	16,631		$	12,523		$	(14,838	)
Provision for (recovery of) credit losses	10			—			175			(614		)	1,699			85
Net interest income (expense) after provision for credit losses	9,899			12,068			4,851			17,245			10,824			(14,923		)
Non-interest income	110			—			7			1,115			235			1,030
Non-interest expense	(5,820		)	(2,557		)	(1,929		)	(7,434		)	(3,598		)	(6,976		)
Income (loss) before income taxes	4,189			9,511			2,929			10,926			7,461			(20,869		)
Income tax expense (benefit)	1,571			3,567			1,098			4,097			2,798			(15,524		)
Net income	$	2,618		$	5,944		$	1,831		$	6,829		$	4,663		$	(5,345	)

Six Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	18,541		$	12,068		$	10,247		$	32,940		$	23,160		$	(28,580	)
Provision for (recovery of) credit losses	88			—			(194		)	(1,779		)	1,937			(3,229		)
Net interest income (expense) after provision for credit losses	18,453			12,068			10,441			34,719			21,223			(25,351		)
Non-interest income	215			—			3			2,752			870			2,964
Non-interest expense	(11,361		)	(2,557		)	(3,953		)	(14,340		)	(7,035		)	(10,158		)
Income (loss) before income taxes	7,307			9,511			6,491			23,131			15,058			(32,545		)
Income tax expense (benefit)	2,740			3,567			2,434			8,674			5,647			(31,659		)
Net income	$	4,567		$	5,944		$	4,057		$	14,457		$	9,411		$	(886	)

55

				Regional Segments
Balance Sheet:	Consolidated Company			Arizona			Nevada			Southern California			Northern California
At December 31, 2015	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	2,266.8		$	2.3		$	9.5		$	2.4		$	2.4
Loans, net of deferred loan fees and costs	11,136.7			2,811.7			1,737.2			1,761.9			1,188.4
Less: allowance for credit losses	(119.1		)	(30.1		)	(18.6		)	(18.8		)	(12.7		)
Total loans	11,017.6			2,781.6			1,718.6			1,743.1			1,175.7
Other assets acquired through foreclosure, net	43.9			8.4			20.8			—			0.3
Goodwill and other intangible assets, net	305.4			—			24.8			—			158.2
Other assets	641.4			43.9			62.3			15.7			16.1
Total assets	$	14,275.1		$	2,836.2		$	1,836.0		$	1,761.2		$	1,352.7
Liabilities:
Deposits	$	12,030.6		$	2,880.7		$	3,382.8		$	1,902.5		$	1,541.1
Borrowings and qualifying debt	360.3			—			—			—			—
Other liabilities	292.7			12.2			29.0			7.8			11.2
Total liabilities	12,683.6			2,892.9			3,411.8			1,910.3			1,552.3
Allocated equity:	1,591.5			309.2			244.4			191.3			293.2
Total liabilities and stockholders' equity	$	14,275.1		$	3,202.1		$	3,656.2		$	2,101.6		$	1,845.5
Excess funds provided (used)	—			365.9			1,820.2			340.4			492.8

Income Statement:
Three Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	108,718		$	32,091		$	29,946		$	24,070		$	5,216
Provision for (recovery of) credit losses	—			826			(3,148		)	633			513
Net interest income (expense) after provision for credit losses	108,718			31,265			33,094			23,437			4,703
Non-interest income	5,545			1,008			2,370			850			271
Non-interest expense	(61,209		)	(14,600		)	(15,032		)	(11,858		)	(1,913		)
Income (loss) before income taxes	53,054			17,673			20,432			12,429			3,061
Income tax expense (benefit)	13,579			6,934			7,151			5,227			1,287
Net income	$	39,475		$	10,739		$	13,281		$	7,202		$	1,774

Six Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	211,826		$	61,076		$	59,155		$	46,560		$	9,669
Provision for (recovery of) credit losses	700			158			(2,799		)	266			486
Net interest income (expense) after provision for credit losses	211,126			60,918			61,954			46,294			9,183
Non-interest income	11,787			1,947			4,653			1,515			322
Non-interest expense	(115,242		)	(29,361		)	(29,506		)	(23,479		)	(3,930		)
Income (loss) before income taxes	107,671			33,504			37,101			24,330			5,575
Income tax expense (benefit)	27,813			13,144			12,985			10,231			2,344
Net income	$	79,858		$	20,360		$	24,116		$	14,099		$	3,231

56

	National Business Lines
Balance Sheet:	HOA Services			Public & Nonprofit Finance			Technology & Innovation			Other NBL			Corporate & Other
At December 31, 2015	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	—		$	—		$	—		$	—		$	2,250.2
Loans, net of deferred loan fees and costs	88.4			1,458.9			770.3			1,280.3			39.6
Less: allowance for credit losses	(0.9		)	(15.6		)	(8.2		)	(13.8		)	(0.4		)
Total loans	87.5			1,443.3			762.1			1,266.5			39.2
Other assets acquired through foreclosure, net	—			—			—			—			14.4
Goodwill and other intangible assets, net	—			—			122.4			—			—
Other assets	0.2			14.0			2.7			11.5			475.0
Total assets	$	87.7		$	1,457.3		$	887.2		$	1,278.0		$	2,778.8
Liabilities:
Deposits	$	1,291.9		$	—		$	842.5		$	—		$	189.1
Borrowings and qualifying debt	—			—			—			—			360.3
Other liabilities	0.5			63.8			—			40.8			127.4
Total liabilities	1,292.4			63.8			842.5			40.8			676.8
Allocated equity:	34.2			87.8			200.9			105.7			124.8
Total liabilities and stockholders' equity	$	1,326.6		$	151.6		$	1,043.4		$	146.5		$	801.6
Excess funds provided (used)	1,238.9			(1,305.7		)	156.2			(1,131.5		)	(1,977.2		)

Income Statement:
Three Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	6,436		$	4,903		$	—	$	13,093		$	(7,037	)
Provision for (recovery of) credit losses	71			1,469			—		(288		)	(76		)
Net interest income (expense) after provision for credit losses	6,365			3,434			—		13,381			(6,961		)
Non-interest income	80			433			—		(192		)	725
Non-interest expense	(4,100		)	(1,384		)	—		(4,061		)	(8,261		)
Income (loss) before income taxes	2,345			2,483			—		9,128			(14,497		)
Income tax expense (benefit)	880			932			—		3,423			(12,255		)
Net income	$	1,465		$	1,551		$	—	$	5,705		$	(2,242	)

Six Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	12,204		$	9,484		$	—	$	26,054		$	(12,376	)
Provision for (recovery of) credit losses	141			2,106			—		413			(71		)
Net interest income (expense) after provision for credit losses	12,063			7,378			—		25,641			(12,305		)
Non-interest income	153			639			—		245			2,313
Non-interest expense	(8,470		)	(2,637		)	—		(7,716		)	(10,143		)
Income (loss) before income taxes	3,746			5,380			—		18,170			(20,135		)
Income tax expense (benefit)	1,405			2,018			—		6,814			(21,128		)
Net income	$	2,341		$	3,362		$	—	$	11,356		$	993

57

15. MERGERS AND ACQUISITIONS

GE Capital US Holdings, Inc. Loan Portfolio

On April 20, 2016, WAB completed its purchase of GE Capital US Holdings, Inc.'s domestic select-service hotel franchise finance loan portfolio, paying cash of $1.27 billion.

Beginning April 20, 2016, the results of the purchased loan portfolio has been reflected in the Company's newly created HFF NBL operating segment. Acquisition / restructure expenses related to the purchase total $1.9 million for the three and six months ended June 30, 2016. The purchase was accounted for under the acquisition method of accounting in accordance with ASC 805. Assets purchased and liabilities assumed were recorded at their respective acquisition date estimated fair values. The fair values of assets acquired and liabilities assumed are subject to adjustment during the first twelve months after the acquisition date if additional information becomes available to indicate a more accurate or appropriate value for an asset or liability. Although measurement period adjustments are not expected to be significant, the fair values of loans and other liabilities are still preliminary as of June 30, 2016.

The recognized amounts of identifiable assets acquired and liabilities assumed are as follows:

	April 20, 2016
	(in thousands)
Assets:
Loans	$	1,280,997
Other assets	3,560
Total assets	$	1,284,557
Liabilities:
Other liabilities	$	12,559
Total liabilities	12,559
Net assets acquired	$	1,271,998
Consideration paid
Cash	$	1,272,187
Goodwill	$	189

The following table presents pro forma information as if the purchase was completed on January 1, 2015. The pro forma information includes adjustments for interest income on loans acquired and excludes acquisition / restructure expense. The pro forma information is not necessarily indicative of the results of operations as they would have been had the transactions been effected on the assumed dates.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands, except per share amounts)
Interest income	$	172,779	$	133,247	$	343,664	$	260,838
Non-interest income	8,559		5,545		21,692		11,787
Net income available to common stockholders	61,749		38,234		130,240		97,449
Earnings per share - basic	0.60		0.43		1.27		1.11
Earnings per share - diluted	0.60		0.43		1.26		1.10

58

Bridge Capital Holdings

On June 30, 2015, the Company completed its acquisition of Bridge Capital Holdings and its wholly-owned subsidiary, Bridge Bank, headquartered in San Jose, California. Under the terms of the acquisition, each outstanding share of Bridge common stock was exchanged for 0.8145 shares of WAL's common stock plus $2.39 in cash. The Company paid $36.5 million in cash and issued 12.5 million common shares for all equity interests in Bridge. The merger was undertaken, in part, because Bridge strengthens the Company's Northern California presence and provides new avenues for growth in technology and international services.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805. Assets purchased and liabilities assumed were recorded at their respective acquisition date estimated fair values. The fair values of assets acquired and liabilities assumed were subject to adjustment during the first twelve months after the acquisition date if additional information became available to indicate a more accurate or appropriate value for an asset or liability.

During the six months ended June 30, 2016, the Company identified $1.5 million in measurement period adjustments from the Bridge acquisition, primarily related to reductions in other assets and accrued liabilities. As the measurement period for the Bridge acquisition ended on June 30, 2016, there will be no additional measurement period adjustments recorded as the fair values of these assets acquired and liabilities assumed are final.

The following table presents pro forma information as if the Bridge acquisition was completed on January 1, 2014.The pro forma information includes adjustments for interest income on loans and securities acquired, amortization of intangibles arising from the transaction and interest expense on deposits acquired. The pro forma information is not necessarily indicative of the results of operations as they would have been had the transactions been effected on the assumed date.

	Three Months Ended June 30, 2015:		Six Months Ended June 30, 2015:
	(in thousands, except per share amounts)
Interest income	$	139,080	$	271,502
Non-interest income	1,840		11,047
Net income available to common stockholders (1)	45,607		90,372
Earnings per share - basic	0.45		0.89
Earnings per share - diluted	0.44		0.88

(1) Excludes acquisition / restructure related costs incurred by the Company and by Bridge of $7.8 million and $8.0 million for the three and six months ended June 30, 2015, respectively, and acquisition / restructure related costs incurred by Bridge of $5.6 million and $6.8 million for the three and six months ended June 30, 2015, respectively, and related tax effects.

59

Item 2. Management's Discussions and Analysis of Financial Condition and Results of Operations.

This discussion is designed to provide insight into management's assessment of significant trends related to the Company's consolidated financial condition, results of operations, liquidity, capital resources, and interest rate sensitivity. This Quarterly Report on Form 10-Q should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2015 and the interim Unaudited Consolidated Financial Statements and Notes to Unaudited Consolidated Financial Statements hereto and financial information appearing elsewhere in this report. Unless the context requires otherwise, the terms "Company," "we," and "our" refer to Western Alliance Bancorporation and its wholly-owned subsidiaries on a consolidated basis.

Forward-Looking Information

Certain statements contained in this Quarterly Report on Form 10-Q for the quarter ended June 30, 2016 are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act. The Company intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements. All statements other than statements of historical fact are “forward-looking statements” for purposes of federal and state securities laws, including statements that are related to or are dependent on estimates or assumptions relating to expectations, beliefs, projections, future plans and strategies, anticipated events or trends, and similar expressions concerning matters that are not historical facts.

The forward-looking statements contained in this Form 10-Q reflect the Company's current views about future events and financial performance and involve certain risks, uncertainties, assumptions, and changes in circumstances that may cause the Company's actual results to differ significantly from historical results and those expressed in any forward-looking statement, including those risks discussed under the heading “Risk Factors” in this Form 10-Q. Risks and uncertainties include those set forth in the Company's filings with the SEC and the following factors that could cause actual results to differ materially from those presented: 1) financial market and economic conditions adversely effecting financial performance; 2) dependency on real estate and events that negatively impact real estate; 3) high concentration of commercial real estate, construction and land development, and commercial and industrial loans; 4) actual credit losses may exceed expected losses in the loan portfolio; 5) the geographic concentrations of the Company's assets increase the risks related to local economic conditions; 6) exposure of financial instruments to certain market risks may cause volatility in earnings; 7) dependence on low-cost deposits; 8) ability to borrow from the FHLB or the FRB; 9) perpetration of computer, internet, or telecommunications fraud; 10) information security breaches; 11) reliance on other companies' infrastructure; 12) a change in the Company's creditworthiness; 13) risks associated with the implementation of the Company's planned system conversion; 14) expansion strategies may not be successful; 15) the Company's ability to compete in a highly competitive market; 16) the Company's ability to recruit and retain qualified employees, especially seasoned relationship bankers and senior management; 17) inadequate or ineffective risk management policies, procedures, and internal controls; 18) risks associated with new lines of businesses or new products and services within existing lines of business; 19) the Company's ability to adapt to technological change; 20) exposure to natural disasters in markets that the Company operates; 21) risk of operating in a highly regulated industry and the Company's ability to remain in compliance; 22) failure to comply with state and federal banking agency laws and regulations; 23) changes in interest rates and increased rate competition; 24) exposure to environmental liabilities related to the properties to which the Company acquires title; and 25) risks related to ownership and price of the Company's common stock.

For more information regarding risks that may cause the Company's actual results to differ materially from any forward-looking statements, see “Risk Factors” in Item 1A of the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

Financial Overview and Highlights

WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of deposit, lending, treasury management, and online banking products and services through its wholly-owned banking subsidiary, WAB.

WAB operates the following full-service banking divisions: ABA in Arizona, BON and FIB in Nevada, Bridge in Northern California, and TPB in Southern California. The Company also serves business customers through a national platform of specialized financial services including AAB, Corporate Finance, Equity Fund Resources, HFF, Life Sciences Group, Mortgage Warehouse Lending, Public and Nonprofit Finance, Renewable Resource Group, Resort Finance, and Technology Finance. In addition, the Company has one non-bank subsidiary, LVSP, which holds and manages certain non-performing loans and OREO.

60

Financial Result Highlights for the Second Quarter of 2016

• Net income of $61.6 million, compared to $39.5 million for the second quarter2015

• Diluted earnings per share of $0.60, compared to $0.44 per share for the second quarter2015

• Total loans of $12.88 billion, up $1.74 billion from December 31, 2015

• Total deposits of $14.20 billion, up $2.17 billion from December 31, 2015

• Net interest margin of 4.63%, compared to 4.41% in the second quarter2015

• Net operating revenue of $172.2 million, constituting year-over-year growth of 50.7%, or $57.9 million. Operating non-interest expense of $77.8 million resulted in year-over-year growth of 42.5%, or $23.2 million¹ 

• Operating pre-provision net revenue of $94.5 million, up58.2% from $59.7 million in the second quarter2015¹

• Efficiency ratio of 43.0% in the second quarter2016, compared to 44.7% in the second quarter2015¹ 

• Nonperforming assets (nonaccrual loans and repossessed assets) decreased to 0.54% of total assets, from 0.88% at June 30, 2015

• Annualized net recoveries to average loans outstanding of 0.01%, compared to 0.13% at June 30, 2015

• Qualifying debt of $382.1 million, an increase of $171.8 million from December 31, 2015 due to issuance of long-term subordinated debt

• Tangible common equity ratio of 9.1%, compared to 8.7% at June 30, 2015¹

• Stockholders' equity of $1.80 billion, an increase of $281.5 million from June 30, 2015 as a result of net income and ATM common stock issuances

• Tangible book value per share, net of tax, of $14.25, an increase of 26.7% from $11.25 at June 30, 2015¹

The impact to the Company from these items, and others of both a positive and negative nature, are discussed in more detail below as they pertain to the Company’s overall comparative performance for the three and six months endedJune 30, 2016. As a bank holding company, management focuses on key ratios in evaluating the Company's financial condition and results of operations.

¹ See Non-GAAP Financial Measures section beginning on page 62.

Results of Operations and Financial Condition

A summary of the Company's results of operations, financial condition, and select metrics are included in the following tables: 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands, except per share amounts)
Net income available to common stockholders	$	61,614		$	39,228		$	122,946		$	79,435
Earnings per share applicable to common stockholders - basic	0.60			0.44			1.20			0.90
Earnings per share applicable to common stockholders - diluted	0.60			0.44			1.19			0.90
Net interest margin	4.63		%	4.41		%	4.60		%	4.38		%
Return on average assets	1.55			1.41			1.62			1.46
Return on average tangible common equity	17.36			16.03			17.88			16.64

	June 30, 2016		December 31, 2015
	(in thousands)
Total assets	$	16,728,767	$	14,275,089
Loans, net of deferred loan fees and costs	12,877,847		11,136,663
Total deposits	14,201,357		12,030,624

61

Asset Quality

For all banks and bank holding companies, asset quality plays a significant role in the overall financial condition of the institution and results of operations. The Company measures asset quality in terms of non-accrual loans as a percentage of gross loans and net charge-offs as a percentage of average loans. Net charge-offs are calculated as the difference between charged-off loans and recovery payments received on previously charged-off loans. The following table summarizes asset quality metrics: 

	June 30, 2016			December 31, 2015
	(in thousands)
Non-accrual loans	$	39,685		$	48,381
Non-performing assets	161,526			166,058
Non-accrual loans to gross loans	0.31		%	0.44		%
Net (recoveries) charge-offs to average loans (1)	(0.01		)%	(0.06		)%

(1)     Annualized for the three months ended June 30, 2016. Actual year-to-date for the year ended December 31, 2015.

Asset and Liability Growth

The Company’s assets and liabilities are comprised primarily of loans and deposits. Therefore, the ability to originate new loans and attract new deposits is fundamental to the Company’s growth. Total assets increased to $16.73 billion at June 30, 2016 from $14.28 billion at December 31, 2015. Total loans, including HFS loans, increased by $1.74 billion to $12.88 billion as of June 30, 2016, compared to $11.14 billion as of December 31, 2015. This loan growth primarily relates to the hotel franchise loan portfolio purchase. Total deposits increased $2.17 billion, or 18.0%, to $14.20 billion as of June 30, 2016 from $12.03 billion as of December 31, 2015.

RESULTS OF OPERATIONS

The following table sets forth a summary financial overview for the comparable periods:  

	Three Months Ended June 30,				Increase		Six Months Ended June 30,				Increase
	2016		2015		(Decrease)		2016		2015		(Decrease)
	(in thousands, except per share amounts)
Consolidated Income Statement Data:
Interest income	$	174,089	$	116,618	$	57,471	$	328,345	$	227,580	$	100,765
Interest expense	10,403		7,900		2,503		18,948		15,754		3,194
Net interest income	163,686		108,718		54,968		309,397		211,826		97,571
Provision for credit losses	2,500		—		2,500		5,000		700		4,300
Net interest income after provision for credit losses	161,186		108,718		52,468		304,397		211,126		93,271
Non-interest income	8,559		5,545		3,014		21,692		11,787		9,905
Non-interest expense	81,804		61,209		20,595		157,297		115,242		42,055
Income before income taxes	87,941		53,054		34,887		168,792		107,671		61,121
Income tax expense	26,327		13,579		12,748		45,846		27,813		18,033
Net income	61,614		39,475		22,139		122,946		79,858		43,088
Net income available to common stockholders	$	61,614	$	39,228	$	22,386	$	122,946	$	79,435	$	43,511
Earnings per share applicable to common stockholders - basic	$	0.60	$	0.44	$	0.16	$	1.20	$	0.90	$	0.30
Earnings per share applicable to common stockholders - diluted	$	0.60	$	0.44	$	0.16	$	1.19	$	0.90	$	0.29

62

Non-GAAP Financial Measures

The following discussion and analysis contains financial information determined by methods other than those prescribed by GAAP. The Company's management uses these non-GAAP financial measures in their analysis of the Company's performance. These measurements typically adjust GAAP performance measures to exclude the effects of unrealized gains or losses on assets and liabilities measured at fair value as well as other items to adjust income available to common stockholders for certain significant activities or transactions that, in management's opinion, do not reflect recurring period-to-period comparisons of the Company's performance. Management believes presentation of these non-GAAP financial measures provides useful supplemental information that is essential to a complete understanding of the operating results of the Company's core businesses. Since the presentation of these non-GAAP performance measures and their impact differ between companies, these non-GAAP disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies.

Operating PPNR

Pre-provision net revenue is defined by the Federal Reserve in SR 14-3, which requires companies subject to the rule to project PPNR over the planning horizon for each of the economic scenarios defined annually by the regulators. Banking regulations define PPNR as net interest income plus non-interest income less non-interest expense. Management has further adjusted this metric to exclude any non-recurring or non-operational elements of non-interest income or non-interest expense, which are outlined in the table below. Management feels that this is an important metric as it illustrates the underlying performance of the Company, it enables investors and others to assess the Company’s ability to generate capital to cover credit losses through the credit cycle, and provides consistent reporting with a key metric used by bank regulatory agencies.

The following table shows the components of operating PPNR for the three and six months endedJune 30, 2016 and 2015:

	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2015			2016		2015
	(in thousands)
Total non-interest income	$	8,559	$	5,545		$	21,692	$	11,787
Less:
Gain (loss) on sales of investment securities, net (1)	—		55			1,001		644
Unrealized gains (losses) on assets and liabilities measured at fair value, net (1)	6		(10		)	1		(10		)
(Loss) on extinguishment of debt	—		(81		)	—		(81		)
Total operating non-interest income	8,553		5,581			20,690		11,234
Plus: net interest income	163,686		108,718			309,397		211,826
Net operating revenue	$	172,239	$	114,299		$	330,087	$	223,060
Total non-interest expense	$	81,804	$	61,209		$	157,297	$	115,242
Less:
Net (gain) loss on sales / valuations of repossessed and other assets (1)	357		(1,218		)	55		(1,569		)
Acquisition / restructure expense (1)	3,662		7,842			3,662		8,001
Total operating non-interest expense	$	77,785	$	54,585		$	153,580	$	108,810
Operating pre-provision net revenue (2)	$	94,454	$	59,714		$	176,507	$	114,250
Plus:
Non-operating revenue adjustments	6		(36		)	1,002		553
Less:
Provision for credit losses	2,500		—			5,000		700
Non-operating expense adjustments	4,019		6,624			3,717		6,432
Income tax expense	26,327		13,579			45,846		27,813
Net income	$	61,614	$	39,475		$	122,946	$	79,858

(1) The operating PPNR non-GAAP performance metric is adjusted to exclude the effects of this non-operational item.

(2) There were no adjustments made for non-recurring items during the three and six months endedJune 30, 2016 and 2015.

63

Tangible Common Equity

The following table presents financial measures related to tangible common equity. Tangible common equity represents total stockholders' equity, less identifiable intangible assets and goodwill. Management believes that tangible common equity financial measures are useful in evaluating the Company's capital strength, financial condition, and ability to manage potential losses. In addition, management believes that these measures improve comparability to other institutions that have not engaged in acquisitions that resulted in recorded goodwill and other intangible assets.

	June 30, 2016			December 31, 2015
	(dollars and shares in thousands)
Total stockholders' equity	$	1,796,210		$	1,591,502
Less: goodwill and intangible assets	304,289			305,354
Total tangible common equity	1,491,921			1,286,148
Plus: deferred tax - attributed to intangible assets	5,594			6,093
Total tangible common equity, net of tax	$	1,497,515		$	1,292,241
Total assets	$	16,728,767		$	14,275,089
Less: goodwill and intangible assets, net	304,289			305,354
Tangible assets	16,424,478			13,969,735
Plus: deferred tax - attributed to intangible assets	5,594			6,093
Total tangible assets, net of tax	$	16,430,072		$	13,975,828
Tangible equity ratio	9.1		%	9.2		%
Tangible common equity ratio	9.1			9.2
Common shares outstanding	105,084			103,087
Tangible book value per share, net of tax	$	14.25		$	12.54

Efficiency Ratio

The following table shows the components used in the calculation of the efficiency ratio, which management uses as a metric for assessing cost efficiency:

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(dollars in thousands)
Total operating non-interest expense	$	77,785		$	54,585		$	153,580		$	108,810
Divided by:
Total net interest income	$	163,686		$	108,718		$	309,397		$	211,826
Plus:
Tax equivalent interest adjustment	8,704			7,878			17,138			15,267
Operating non-interest income	8,553			5,581			20,690			11,234
Net operating revenue - TEB	$	180,943		$	122,177		$	347,225		$	238,327
Efficiency ratio - TEB	43.0		%	44.7		%	44.2		%	45.7		%

64

Adjusted Allowance for Credit Losses

The adjusted allowance for credit losses to gross loans ratio includes an adjustment for the remaining credit marks on acquired performing and PCI loans. Under GAAP, the allowance for credit losses on acquired loans is not carried over in an acquisition as acquired loans are recorded at fair value, net of related interest rate and credit marks, which discounts the loans based on expected future cash flows. The credit marks on acquired loans represent the allowance for credit losses carried over to the Company. Therefore, by adding back the remaining credit marks on acquired loans, management believes this is more indicative of the allowance available for inherent losses in the loan portfolio.

	June 30, 2016			December 31, 2015
	(dollars in thousands)
Allowance for credit losses	$	122,104		$	119,068
Plus: remaining credit marks
Acquired performing loans	45,225			12,154
Purchased credit impaired loans	16,438			8,491
Adjusted allowance for credit losses	$	183,767		$	139,713
Gross loans held for investment and deferred fees, net	$	12,855,511		$	11,112,854
Plus: remaining credit marks
Acquired performing loans	45,225			12,154
Purchased credit impaired loans	16,438			8,491
Adjusted loans, net of deferred fees and costs	$	12,917,174		$	11,133,499
Allowance for credit losses to gross loans	0.95		%	1.07		%
Allowance for credit losses to gross loans, adjusted for acquisition accounting	1.42		%	1.25		%

65

Regulatory Capital

The following table presents certain financial measures related to regulatory capital under Basel III, which includes Common Equity Tier 1 and total capital. The FRB and other banking regulators use Common Equity Tier 1 and total capital as a basis for assessing a bank's capital adequacy; therefore, management believes it is useful to assess financial condition and capital adequacy using this same basis. Specifically, the total capital ratio takes into consideration the risk levels of assets and off-balance sheet financial instruments. In addition, management believes that the classified assets to Common Equity Tier 1 plus allowance measure is an important regulatory metric for assessing asset quality.

	June 30, 2016			December 31, 2015
	(dollars in thousands)
Common Equity Tier 1:
Common Equity	$	1,796,210		$	1,591,502
Less:
Non-qualifying goodwill and intangibles	295,204			293,487
Disallowed deferred tax asset	4,131			5,001
AOCI related adjustments	33,259			10,228
Unrealized gain on changes in fair value liabilities	10,203			6,309
Common Equity Tier 1 (regulatory)	$	1,453,413		$	1,276,477
Divided by: Risk-weighted assets (regulatory)	$	15,189,237		$	13,193,563
Common Equity Tier 1 ratio	9.6		%	9.7		%
Common Equity Tier 1 (regulatory)	$	1,453,413		$	1,276,477
Plus:
Trust preferred securities	81,500			81,500
Less:
Disallowed deferred tax asset	2,754			7,502
Unrealized gain on changes in fair value liabilities	6,802			9,464
Tier 1 capital	$	1,525,357		$	1,341,011
Total Capital:
Tier 1 capital (regulatory)	$	1,525,357		$	1,341,011
Plus:
Subordinated debt	303,956			140,097
Qualifying allowance for credit losses	122,104			119,068
Other	3,875			3,296
Less: Tier 2 qualifying capital deductions	—			—
Tier 2 capital	$	429,935		$	262,461
Total capital	$	1,955,292		$	1,603,472
Total capital ratio	12.9		%	12.2		%
Classified assets to Common Equity Tier 1 plus allowance for credit losses:
Classified assets	$	219,319		$	221,126
Divided by:
Tier 1 capital (regulatory)	1,525,357			1,341,011
Plus: Allowance for credit losses	122,104			119,068
Total Common Equity Tier 1 plus allowance for credit losses	$	1,647,461		$	1,460,079
Classified assets to Common Equity Tier 1 plus allowance	13.3		%	15.1		%

66

Net Interest Margin

The net interest margin is reported on a TEB. A tax equivalent adjustment is added to reflect interest earned on certain municipal securities and loans that are exempt from federal income tax. The following tables set forth the average balances, interest income, interest expense, and average yield (on a fully TEB) for the periods indicated:

	Three Months Ended June 30,
	2016							2015
	Average Balance			Interest		Average Yield / Cost		Average Balance			Interest		Average Yield / Cost
	(dollars in thousands)
Interest earning assets
Commercial	$	5,365,035		$	63,621	5.24	%	$	3,645,249		$	35,552	4.59	%
Commercial real estate - non-owner occupied	3,257,651			47,452		5.83		2,127,590			29,532		5.55
Commercial real estate - owner occupied	2,012,668			25,715		5.11		1,890,193			24,132		5.11
Construction and land development	1,293,659			19,094		5.90		854,434			12,575		5.89
Residential real estate	299,849			3,383		4.51		291,672			3,244		4.45
Consumer	35,679			428		4.80		26,135			408		6.24
Loans held for sale	22,762			322		5.66		2,473			25		4.04
Total loans (1) (2) (3)	12,287,303			160,015		5.43		8,837,746			105,468		5.06
Securities - taxable (1)	1,547,833			8,514		2.20		1,043,257			5,793		2.22
Securities - tax-exempt	469,637			4,357		5.44		380,303			3,483		5.36
Total securities	2,017,470			12,871		2.95		1,423,560			9,276		3.06
Other	597,542			1,203		0.81		309,437			1,874		2.42
Total interest earning assets	14,902,315			174,089		4.91		10,570,743			116,618		4.71
Non-interest earning assets
Cash and due from banks	134,174							118,581
Allowance for credit losses	(120,373		)					(114,892		)
Bank owned life insurance	163,694							143,214
Other assets	832,648							459,075
Total assets	$	15,912,458						$	11,176,721
Interest-bearing liabilities
Interest-bearing deposits:
Interest-bearing transaction accounts	$	1,194,171		$	504	0.17	%	$	971,609		$	414	0.17	%
Savings and money market	5,837,403			4,978		0.34		4,213,013			2,975		0.28
Time certificates of deposit	1,757,158			2,196		0.50		1,834,352			1,973		0.43
Total interest-bearing deposits	8,788,732			7,678		0.35		7,018,974			5,362		0.31
Short-term borrowings	153,063			211		0.55		177,799			1,774		3.99
Long-term debt	—			—		—		107,692			284		1.05
Qualifying debt	227,510			2,514		4.42		44,096			480		4.35
Total interest-bearing liabilities	9,169,305			10,403		0.45		7,348,561			7,900		0.43
Non-interest-bearing liabilities
Non-interest-bearing demand deposits	4,772,582							2,593,543
Other liabilities	246,742							148,371
Stockholders’ equity	1,723,829							1,086,246
Total liabilities and stockholders' equity	$	15,912,458						$	11,176,721
Net interest income and margin (4)				$	163,686	4.63	%				$	108,718	4.41	%
Net interest spread (5)						4.46	%						4.28	%

(1) Yields on loans and securities have been adjusted to a TEB. The taxable-equivalent adjustment was $8.7 million and $7.9 million for the three months ended June 30, 2016 and 2015, respectively.

(2) Net loan fees of $10.5 million and $6.0 million are included in the yield computation for the three months ended June 30, 2016 and 2015, respectively.

(3) Includes non-accrual loans.

(4) Net interest margin is computed by dividing net interest income by total average earning assets and annualized based on a 30 day month and 360 day year.

(5) Net interest spread represents average yield earned on interest-earning assets less the average rate paid on interest bearing liabilities.

67

	Six Months Ended June 30,
	2016							2015
	Average Balance			Interest		Average Yield / Cost		Average Balance			Interest		Average Yield / Cost
	(dollars in thousands)
Interest earning assets
Commercial	$	5,262,789		$	124,546	5.24	%	$	3,616,638		$	70,132	4.54	%
Commercial real estate - non-owner occupied	2,765,047			78,405		5.67		2,087,325			57,363		5.50
Commercial real estate - owner occupied	2,037,019			51,901		5.10		1,845,136			46,699		5.06
Construction and land development	1,229,881			36,589		5.95		821,662			24,013		5.84
Residential real estate	305,680			6,891		4.51		293,740			6,788		4.62
Consumer	32,251			794		4.92		27,361			839		6.13
Loans held for sale	23,452			675		5.76		1,243			25		4.02
Total Loans (1), (2), (3)	11,656,119			299,801		5.37		8,693,105			205,859		5.01
Securities - taxable (1)	1,558,093			17,851		2.29		1,069,238			12,085		2.26
Securities - tax-exempt	462,183			8,528		5.33		382,074			6,979		5.35
Total securities	2,020,276			26,379		2.99		1,451,312			19,064		3.07
Other	507,521			2,165		0.85		223,283			2,657		2.38
Total interest earnings assets	14,183,916			328,345		4.87		10,367,700			227,580		4.68
Non-interest earning assets
Cash and due from banks	137,462							118,337
Allowance for credit losses	(120,953		)					(112,955		)
Bank owned life insurance	163,238							142,792
Other assets	827,638							454,616
Total assets	$	15,191,301						$	10,970,490
Interest-bearing liabilities
Interest-bearing deposits:
Interest bearing transaction accounts	$	1,143,028		$	959	0.17	%	$	945,943		$	808	0.17	%
Savings and money market	5,585,654			9,012		0.32		4,062,052			5,751		0.28
Time certificates of deposits	1,659,327			3,950		0.48		1,884,643			3,949		0.42
Total interest-bearing deposits	8,388,009			13,921		0.33		6,892,638			10,508		0.30
Short-term borrowings	102,942			329		0.64		177,647			3,525		3.97
Long-term debt	—			—		—		154,581			801		1.04
Qualifying debt	213,474			4,698		4.40		42,278			920		4.35
Total interest-bearing liabilities	8,704,425			18,948		0.44		7,267,144			15,754		0.43
Non-interest-bearing liabilities
Non-interest-bearing demand deposits	4,561,357							2,482,314
Other liabilities	245,614							162,658
Stockholders’ equity	1,679,905							1,058,374
Total liabilities and stockholders' equity	$	15,191,301						$	10,970,490
Net interest income and margin (4)				$	309,397	4.60	%				$	211,826	4.38	%
Net interest spread (5)						4.43	%						4.25	%

(1) Yields on loans and securities have been adjusted to a TEB. The taxable-equivalent adjustment was $17.1 million and $15.3 million for the six months ended June 30, 2016 and 2015, respectively.

(2) Net loan fees of $20.7 million and $11.2 million are included in the yield computation for the six months ended June 30, 2016 and 2015, respectively.

(3) Includes non-accrual loans.

(4) Net interest margin is computed by dividing net interest income by total average earning assets and annualized based on a 30 day month and 360 day year.

(5) Net interest spread represents average yield earned on interest-earning assets less the average rate paid on interest bearing liabilities.

68

	Three Months Ended June 30,									Six Months Ended June 30,
	2016 versus 2015									2016 versus 2015
	Increase (Decrease) Due to Changes in (1)									Increase (Decrease) Due to Changes in (1)
	Volume			Rate			Total			Volume			Rate			Total
	(in thousands)
Interest income:
Loans, HFI
Commercial	$	20,394		$	7,675		$	28,069		$	38,957		$	15,457		$	54,414
Commercial real estate - non-owner occupied	16,461			1,459			17,920			19,217			1,825			21,042
Commercial real estate - owner occupied	1,565			18			1,583			4,889			313			5,202
Construction and land development	6,483			36			6,519			12,145			431			12,576
Residential real estate	92			47			139			269			(166		)	103
Consumer	114			(94		)	20			120			(165		)	(45		)
Loans held for sale	287			10			297			639			11			650
Total loans	$	45,396		$	9,151		$	54,547		$	76,236		$	17,706		$	93,942
Securities
Securities - taxable	2,775			(54		)	2,721			5,601			165			5,766
Securities - tax-exempt	829			45			874			1,478			71			1,549
Total securities	3,604			(9		)	3,595			7,079			236			7,315
Other	580			(1,251		)	(671		)	1,213			(1,705		)	(492		)
Total interest income	49,580			7,891			57,471			84,528			16,237			100,765
Interest expense:
Interest bearing transaction accounts	94			(4		)	90			165			(14		)	151
Savings and money market	1,385			618			2,003			2,458			803			3,261
Time certificates of deposit	(96		)	319			223			(536		)	537			1
Short-term borrowings	(34		)	(1,529		)	(1,563		)	(239		)	(2,957		)	(3,196		)
Long-term debt	—			(284		)	(284		)	—			(801		)	(801		)
Qualifying debt	2,027			7			2,034			3,768			10			3,778
Total interest expense	3,376			(873		)	2,503			5,616			(2,422		)	3,194
Net increase (decrease)	$	46,204		$	8,764		$	54,968		$	78,912		$	18,659		$	97,571

(1) Changes due to both volume and rate have been allocated to volume changes.

Comparison of interest income, interest expense and net interest margin

The Company's primary source of revenue is interest income. Interest income for the three months endedJune 30, 2016 was $174.1 million, an increase of $57.5 million, or 49.3%, compared to $116.6 million for the same period in 2015. This increase was the result of a $3.45 billion increase in the average loan balance, which drove a $54.5 million increase in loan interest income. The Bridge acquisition increased the Company's loan balance by $1.44 billion and also contributed $28.5 million to loan interest income during three months endedJune 30, 2016. The purchase of the HFF loan portfolio on April 20, 2016 increased the Company's loan balance by $1.28 billion resulting in loan interest income of $17.9 million for the three months endedJune 30, 2016. The remaining increase in interest income is related to organic growth.

For the six months endedJune 30, 2016, interest income was $328.3 million, an increase of 44.3%, compared to $227.6 million for the same period in 2015. This increase was primarily the result of a $2.96 billion increase in the average loan balance and an increase of 36 basis points in the average yield on loans, which drove a $93.9 million increase in loan interest income for the six months endedJune 30, 2016. The Bridge acquisition contributed $56.3 million to loan interest income during 2016 and the purchase of the HFF loan portfolio on April 20, 2016 resulted in loan interest income of $17.9 million for the six months endedJune 30, 2016. The remaining increase in interest income is related to organic growth.

Interest expense for the three months endedJune 30, 2016 was $10.4 million, compared to $7.9 million for the same period in 2015. Interest expense on deposits increased $2.3 million as the average interest bearing deposits for the quarter increased $1.77 billion. The $2.0 million increase in interest expense on qualifying debt from the issuance of $150.0 million in subordinated debt during the second quarter 2015 and the junior subordinated debt assumed by the Company in the Bridge acquisition was offset by a $1.8 million decrease in interest expense related to short-term and long-term borrowings.

69

For the six months endedJune 30, 2016 and 2015, interest expense was $18.9 million and $15.8 million, respectively. Interest expense on deposits increased $3.4 million for the same period as average interest bearing deposits increased $1.50 billion. Interest expense on qualifying debt increased $3.8 million from the six months endedJune 30, 2015 as the average qualifying debt balance increased $171.2 million. As the $175.0 million issuance of subordinated debentures occurred on June 16, 2016, the impact from the issuance on the average qualifying debt balance for the six months endedJune 30, 2016 was not significant. These increases were offset by a decrease in interest expense on short-term and long-term borrowings of $4.0 million as a result of a $229.3 million decrease in average short-term and long-term borrowings for the six months endedJune 30, 2016 compared to the same period in 2015.

Net interest income was $163.7 million for the three months endedJune 30, 2016, compared to $108.7 million for the same period in 2015, an increase of $55.0 million, or 50.6%. The increase in net interest income reflects a $4.33 billion increase in average interest earning assets, offset by a $1.82 billion increase in average interest-bearing liabilities. The increase in net interest margin of 22 basis points was the result of an increase in the average loan balance and average yield on loans compared to the three months endedJune 30, 2015.

For the six months endedJune 30, 2016 and 2015, net interest income was $309.4 million and $211.8 million, respectively. The increase in net interest income reflects a $3.82 billion increase in average interest earning assets, offset by a $1.44 billion increase in average interest-bearing liabilities. The increase in net interest margin of 22 basis points was the result of an increase in the average loan balance and average yield on loans compared to the six months endedJune 30, 2015.

Provision for Credit Losses

The provision for credit losses in each period is reflected as a reduction in earnings in that period. The provision is equal to the amount required to maintain the allowance for credit losses at a level that is adequate to absorb probable credit losses inherent in the loan portfolio. For the three months endedJune 30, 2016, the provision for credit losses was $2.5 million, compared to zero for the three months endedJune 30, 2015. For the six months endedJune 30, 2016, the provision for credit losses was $5.0 million, compared to $0.7 million for the six months endedJune 30, 2015. The Company may establish an additional allowance for credit losses for PCI loans through provision for credit losses when impairment is determined as a result of lower than expected cash flows. As of June 30, 2016 and December 31, 2015, the allowance for credit losses on PCI loans was $0.4 million and $0.1 million, respectively.

Non-interest Income

The following table presents a summary of non-interest income for the periods presented: 

	Three Months Ended June 30,							Six Months Ended June 30,
	2016		2015		Increase (Decrease)			2016		2015		Increase (Decrease)
	(in thousands)
Service charges and fees	$	4,506	$	3,128	$	1,378		$	8,972	$	6,017	$	2,955
Lending related income and gains (losses) on sale of loans, net	253		118		135			4,194		319		3,875
Card income	1,078		899		179			2,091		1,712		379
Gain (loss) on sales of investment securities, net	—		55		(55		)	1,001		644		357
Income from bank owned life insurance	1,029		772		257			1,959		1,749		210
Other income	1,693		573		1,120			3,475		1,346		2,129
Total non-interest income	$	8,559	$	5,545	$	3,014		$	21,692	$	11,787	$	9,905

Total non-interest income for the three months endedJune 30, 2016 compared to the same period in 2015, increased by $3.0 million, or 54.4%. The increase was primarily due to service charges and fees and other income. The increase in service charges and fees was primarily due to the addition of Bridge. In addition, other income increased primarily due to foreign exchange income from Bridge operations of $0.6 million for the three months endedJune 30, 2016.

Total non-interest income for the six months endedJune 30, 2016 compared to the same period in 2015, increased by $9.9 million, or 84.0%. The increase was primarily attributable to service charges and fees, lending related income and gains (losses) on sales of loans, net, and other income. The increase in service charges and fees is primarily due to Bridge operations. Lending related income and gains (losses) on sales of loans, net increased due to increases in total non-recurring gains on sale of loans of $1.7 million and letters of credit fees of $0.8 million as well as Bridge operations of $0.4 million. Other income increased $1.5 million from Bridge foreign exchange operations for six months endedJune 30, 2016.

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Non-interest Expense

The following table presents a summary of non-interest expense for the periods presented:

	Three Months Ended June 30,								Six Months Ended June 30,
	2016		2015			Increase (Decrease)			2016		2015			Increase (Decrease)
	(in thousands)
Salaries and employee benefits	$	44,711	$	32,406		$	12,305		$	89,566	$	64,947		$	24,619
Occupancy	7,246		4,949			2,297			13,503		9,762			3,741
Legal, professional, and directors' fees	5,747		4,611			1,136			11,319		8,606			2,713
Data processing	5,868		2,683			3,185			10,429		5,809			4,620
Insurance	2,963		2,274			689			6,286		4,364			1,922
Loan and repossessed asset expenses	832		1,284			(452		)	1,734		2,374			(640		)
Card expense	824		613			211			1,711		1,087			624
Marketing	1,097		463			634			1,754		840			914
Intangible amortization	697		281			416			1,394		562			832
Net loss (gain) on sales / valuations of repossessed and other assets	357		(1,218		)	1,575			55		(1,569		)	1,624
Acquisition / restructure expense	3,662		7,842			(4,180		)	3,662		8,001			(4,339		)
Other expense	7,800		5,021			2,779			15,884		10,459			5,425
Total non-interest expense	$	81,804	$	61,209		$	20,595		$	157,297	$	115,242		$	42,055

Total non-interest expense for the three months endedJune 30, 2016 compared to 2015, increased$20.6 million, or 33.6%. This increase primarily related to salaries and employee benefits, occupancy, legal, professional, and directors' fees, data processing, net loss on sales/valuations of repossessed and other assets, and other expense. The increase in salaries and employee benefits was primarily attributable to the addition of Bridge and HFF employees as well as growth in staffing to support continued asset growth. The increase in occupancy and other expense related to the addition of Bridge offices, which increased rent expense, office utilities, and depreciation on premises and equipment. The legal, professional, and directors' fees increase is attributable to professional services to support the continued growth of the Company in various initiatives. Data processing increased due to the addition of Bridge, HFF, and technology enhancement initiatives. The change in net loss (gain) on sales / valuations of repossessed and other assets resulted in an increase in non-interest expense due to recognition of a net loss during the three months endedJune 30, 2016 compared to net gain of $1.2 million for the same period in 2015. These increases in non-interest expense were partially offset by a $4.2 million decrease in acquisition / restructure expense due to higher one-time costs in prior year with the Bridge acquisition than current acquisition costs for HFF and restructure costs for the upcoming system conversion.

Total non-interest expense for the six months endedJune 30, 2016 compared to 2015, increased$42.1 million, or 36.5%. This increase related to salaries and employee benefits, occupancy, legal, professional, and directors' fees, data processing, insurance, net loss on sales/valuations of repossessed and other assets, and other expense. With the exception of the increase in insurance, the explanations for the increases in non-interest expense for the six months endedJune 30, 2016 compared to the same period in 2015 are the same as the explanations for the three months ended June 30, 2016 compared to the same period in 2015. The increase in insurance relates to higher FDIC assessments as a result of organic growth.

Income Taxes

For the six months endedJune 30, 2016 and 2015, the Company's effective tax rate was 27.16% and 25.83%, respectively. The increase in the effective tax rate for the six months endedJune 30, 2016 is due primarily to an increase in projected pre-tax book income without corresponding proportional increases to favorable tax rate items.

71

Business Segment Results

The Company's reportable segments are aggregated primarily based on geographic location, services offered, and markets served. In anticipation of the acquisition of GE's hotel franchise loan portfolio, which expands the size and scope of the Company's NBL reportable segment, management has reassessed the organization and management of its operating segments included in the NBL reportable segment. Accordingly, four reportable NBL segments are now presented separately.

The Company's regional segments, which include Arizona, Nevada, Southern California, and Northern California, provide full service banking and related services to their respective markets. The Company's NBL segments, which include HOA services, HFF, Public & Nonprofit Finance, Technology & Innovation, and Other NBLs, provide specialized banking services to niche markets. These NBLs are managed centrally and are broader in geographic scope than our other segments, though still predominately located within our core market areas. The Corporate & Other segment consists of corporate-related items, income and expense items not allocated to our other reportable segments, and inter-segment eliminations.

The operating segments were as follows: Arizona, Nevada, Southern California, Northern California, HOA Services, HFF, Public & Nonprofit Finance, Technology & Innovation, Other NBLs, and Corporate & Other. The following tables present selected operating segment information for the periods presented:

			Regional Segments
	Consolidated Company		Arizona		Nevada		Southern California		Northern California
	(in millions)
At June 30, 2016
Loans, net of deferred loan fees and costs	$	12,877.8	$	2,897.6	$	1,727.0	$	1,801.2	$	1,139.5
Deposits	14,201.4		3,801.4		3,623.0		2,404.0		1,510.9
At December 31, 2015
Loans, net of deferred loan fees and costs	$	11,136.7	$	2,811.7	$	1,737.2	$	1,761.9	$	1,188.4
Deposits	12,030.6		2,880.7		3,382.8		1,902.5		1,541.1

	(in thousands)
Three Months Ended June 30, 2016:
Pre-tax income (loss)	$	87,941	$	25,839	$	22,441	$	15,509	$	10,005
Six Months Ended June 30, 2016:
Pre-tax income (loss)	$	168,792	$	46,747	$	43,142	$	29,333	$	20,617
Three Months Ended June 30, 2015:
Pre-tax income (loss)	$	53,054	$	17,673	$	20,432	$	12,429	$	3,061
Six Months Ended June 30, 2015:
Pre-tax income (loss)	$	107,671	$	33,504	$	37,101	$	24,330	$	5,575

72

	National Business Lines
	HOA Services		HFF		Public & Nonprofit Finance		Technology & Innovation		Other NBL		Corporate & Other
	(in millions)
At June 30, 2016
Loans, net of deferred loan fees and costs	$	98.3	$	1,262.8	$	1,481.4	$	943.5	$	1,498.6	$	27.9
Deposits	1,711.3		—		—		963.0		—		187.8
At December 31, 2015
Loans, net of deferred loan fees and costs	$	88.4	$	—	$	1,458.9	$	770.3	$	1,280.3	$	39.6
Deposits	1,291.9		—		—		842.5		—		189.1

	National Business Lines
	HOA Services		HFF		Public & Nonprofit Finance		Technology & Innovation		Other NBL		Corporate & Other
	(in thousands)
Three Months Ended June 30, 2016:
Pre-tax income (loss)	$	4,189	$	9,511	$	2,929	$	10,926	$	7,461	$	(20,869	)
Six Months Ended June 30, 2016:
Pre-tax income (loss)	$	7,307	$	9,511	$	6,491	$	23,131	$	15,058	$	(32,545	)
Three Months Ended June 30, 2015:
Pre-tax income (loss)	$	2,345	$	—	$	2,483	$	—	$	9,128	$	(14,497	)
Six Months Ended June 30, 2015:
Pre-tax income (loss)	$	3,746	$	—	$	5,380	$	—	$	18,170	$	(20,135	)

73

BALANCE SHEET ANALYSIS

Total assets increased$2.45 billion, or 17.2%, to $16.73 billion at June 30, 2016, compared to $14.28 billion at December 31, 2015. The increase in assets primarily related to the purchase of a hotel franchise finance loan portfolio as well as organic loan growth.

Total liabilities increased$2.25 billion, or 17.7%, to $14.93 billion at June 30, 2016, compared to $12.68 billion at December 31, 2015. The increase in liabilities was due to an increase in total deposits of $2.17 billion, or 18.0%, to $14.20 billion due to organic growth.

Total stockholders’ equity increased by $204.7 million, or 12.9%, to $1.80 billion at June 30, 2016, compared to $1.59 billion at December 31, 2015. The increase in stockholders' equity was due to net income for the six months endedJune 30, 2016, issuances of common stock under the Company's ATM program, and an increase in the fair value of the Company's AFS portfolio, which is recognized as part of AOCI.

Investment securities

Investment securities are classified at the time of acquisition as either HTM, AFS, or measured at fair value based upon various factors, including asset/liability management strategies, liquidity and profitability objectives, and regulatory requirements. HTM securities are carried at amortized cost, adjusted for amortization of premiums or accretion of discounts. AFS securities are securities that may be sold prior to maturity based upon asset/liability management decisions. Investment securities classified as AFS are carried at fair value. Unrealized gains or losses on AFS securities are recorded as part of AOCI in stockholders’ equity. Amortization of premiums or accretion of discounts on MBS is periodically adjusted for estimated prepayments. Investment securities measured at fair value are reported at fair value, with unrealized gains and losses included in current period earnings.

The investment securities portfolio of the Company is utilized as collateral for borrowings, required collateral for public deposits, and customer repurchase agreements, and to manage liquidity, capital, and interest rate risk. The following table summarizes the carrying value of the investment securities portfolio for each of the periods below: 

	June 30, 2016		December 31, 2015
	(in thousands)
Held-to-maturity
Tax-exempt bonds	$	36,929	$	—
Available-for-sale
Collateralized debt obligations	$	10,183	$	10,060
Commercial MBS issued by GSEs	44,498		19,114
Corporate debt securities	8,362		13,251
CRA investments	35,383		34,685
Municipal obligations	346,761		334,830
Preferred stock	109,276		111,236
Private label commercial MBS	3,721		4,691
Private label residential MBS	339,355		257,128
Residential MBS issued by GSEs	1,207,745		1,170,221
Trust preferred securities	23,701		24,314
U.S. government sponsored agency securities	34,003		—
U.S. treasury securities	2,551		2,993
Total AFS securities	$	2,165,539	$	1,982,523
Securities measured at fair value
Residential MBS issued by GSEs	$	1,326	$	1,481

The Company does not own any subprime MBS in its investment portfolio. The majority of its MBS are GSE issued. The remaining MBS not GSE issued consist of $279.7 million rated AAA, $34.7 million rated AA, $2.6 million rated A, $1.2 million rated BBB, and $2.9 million are non-investment grade.

74

Gross unrealized losses at June 30, 2016 are primarily caused by interest rate fluctuations, credit spread widening, and reduced liquidity in applicable markets. The Company has reviewed securities on which there is an unrealized loss in accordance with its accounting policy for OTTI securities described in "Note 2. Investment Securities" to the Consolidated Financial Statements contained herein. There were no impairment charges recorded during the three and six months endedJune 30, 2016 and 2015.

The Company does not consider any securities to be other-than-temporarily impaired as of June 30, 2016 and December 31, 2015. However, the Company cannot guarantee that OTTI will not occur in future periods. At June 30, 2016, the Company had the intent and ability to retain its investments for a period of time sufficient to allow for any anticipated recovery in fair value.

Loans

The table below summarizes the distribution of the Company’s held for investment loan portfolio at the end of each of the periods indicated: 

	June 30, 2016			December 31, 2015
	(in thousands)
Loans, held for investment
Commercial and industrial	$	5,454,939		$	5,114,257
Commercial real estate - non-owner occupied	3,601,331			2,283,536
Commercial real estate - owner occupied	2,008,261			2,083,285
Construction and land development	1,333,537			1,133,439
Residential real estate	293,020			322,939
Commercial leases	122,668			148,493
Consumer	41,755			26,905
Loans, net of deferred loan fees and costs	12,855,511			11,112,854
Allowance for credit losses	(122,104		)	(119,068		)
Total loans HFI	$	12,733,407		$	10,993,786

Net deferred loan fees and costs as of June 30, 2016 and December 31, 2015 total $19.8 million and $19.2 million, respectively, which is a reduction in the carrying value of loans. Net unamortized discounts on loans total $7.5 million and $8.2 million as of June 30, 2016 and December 31, 2015, respectively. Total loans held for investment are also net of interest rate and credit marks on acquired loans totaling $84.7 million and $40.5 million as of June 30, 2016 and December 31, 2015, respectively, which is a reduction in the carrying value of acquired loans.

As of June 30, 2016 and December 31, 2015, the Company also had $22.3 million and $23.8 million of HFS loans, respectively.

Concentrations of Lending Activities

The Company monitors concentrations within four broad categories: geography, industry, product, and collateral. The Company’s loan portfolio includes significant credit exposure to the CRE market. As of June 30, 2016 and December 31, 2015, CRE related loans accounted for approximately 54% and 49% of total loans, respectively. Substantially all of these loans are secured by first liens with an initial loan to value ratio of generally not more than 75%. Approximately 36% and 48% of these CRE loans, excluding construction and land loans, were owner-occupied at June 30, 2016 and December 31, 2015, respectively.

Impaired loans

A loan is identified as impaired when it is no longer probable that interest and principal will be collected according to the contractual terms of the original loan agreement. Generally, impaired loans are classified as non-accrual. However, in certain instances, impaired loans may continue on an accrual basis if full repayment of all principal and interest is expected and the loan is both well-secured and in the process of collection. Impaired loans are measured for reserve requirements in accordance with ASC 310 based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral less applicable disposition costs if the loan is collateral dependent. The amount of an impairment reserve, if any, and any subsequent changes are charged against the allowance for credit losses.

In addition to the Company's own internal loan review process, regulators may from time to time direct the Company to modify loan grades, loan impairment calculations, or loan impairment methodology.

75

Total non-performing loans, excluding loans acquired with deteriorated credit quality, decreased by $12.1 million, or 9.9%, at June 30, 2016 to $110.0 million from $122.1 million at December 31, 2015. 

	June 30, 2016			December 31, 2015
	(dollars in thousands)
Total non-accrual loans (1)	$	39,685		$	48,381
Loans past due 90 days or more on accrual status	5,319			3,028
Accruing troubled debt restructured loans	65,008			70,707
Total nonperforming loans, excluding loans acquired with deteriorated credit quality	110,012			122,116
Other impaired loans	6,454			6,758
Total impaired loans	$	116,466		$	128,874
Loans acquired with deteriorated credit quality
Loans past due 90 days or more on accrual status	$	1,672		$	—
Other assets acquired through foreclosure, net	49,842			43,942
Non-accrual loans to gross loans held for investment	0.31		%	0.44		%
Loans past due 90 days or more on accrual status to gross loans held for investment	0.05			0.03

(1) Includes non-accrual TDR loans of $4.2 million and $18.2 million as of June 30, 2016 and December 31, 2015, respectively.

Interest income received on non-accrual loans was $0.2 million and $0.4 million for the three and six months endedJune 30, 2016, respectively, compared to $0.5 million and $1.2 million for the three and six months endedJune 30, 2015, respectively. Interest income that would have been recorded under the original terms of non-accrual loans was $0.5 million and $0.9 million for the three and six months endedJune 30, 2016, respectively, compared to $0.7 million and $1.4 million for the three and six months endedJune 30, 2015, respectively.

The composition of non-accrual loans by loan type and by segment were as follows: 

	June 30, 2016						December 31, 2015
	Non-accrual Balance		Percent of Non-Accrual Balance		Percent of Total HFI Loans		Non-accrual Balance		Percent of Non-Accrual Balance		Percent of Total HFI Loans
	(dollars in thousands)
Commercial and industrial	$	22,412	56.47	%	0.18	%	$	20,877	43.15	%	0.19	%
Commercial real estate	10,896		27.46		0.08		18,675		38.60		0.17
Construction and land development	1,284		3.24		0.01		2,309		4.77		0.02
Residential real estate	4,934		12.43		0.04		6,324		13.07		0.06
Consumer	159		0.40		—		196		0.41		—
Total non-accrual loans	$	39,685	100.00	%	0.31	%	$	48,381	100.00	%	0.44	%

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	June 30, 2016				December 31, 2015
	Nonaccrual Loans		Percent of Segment's Total HFI Loans		Nonaccrual Loans		Percent of Segment's Total HFI Loans
	(dollars in thousands)
Regional Segments
Arizona	$	7,282	0.25	%	$	10,596	0.38	%
Nevada	11,960		0.69		8,010		0.46
Southern California	2,640		0.15		2,844		0.16
Northern California	4,990		0.45		1,590		0.14
Total Regional Segments	26,872		0.36		23,040		0.31
National Business Lines
HOA Services	—		—		—		—
HFF	—		—		—		—
Public & Nonprofit	—		—		—		—
Technology & Innovation	10,755		1.14		10,022		1.30
Other NBL	159		0.01		196		0.02
Total NBL	10,914		0.21		10,218		0.28
Corporate & Other	1,899		6.80		15,123		38.18
Total non-accrual loans	$	39,685	0.31	%	$	48,381	0.44	%

Troubled Debt Restructured Loans

A TDR loan is a loan that is granted a concession, for reasons related to a borrower’s financial difficulties, that the lender would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in accrued interest, extensions, deferrals, renewals, and rewrites. A TDR loan is also considered impaired. Generally, a loan that is modified at an effective market rate of interest is no longer disclosed as a TDR in years subsequent to the restructuring if it is performing based on the terms specified by the restructuring agreement. However, such loans continue to be considered impaired.

As of June 30, 2016 and December 31, 2015, the aggregate amount of loans classified as impaired was $116.5 million and $128.9 million, respectively, a net decrease of 9.6%. The total specific allowance for credit losses related to these loans was $6.4 million and $4.7 million at June 30, 2016 and December 31, 2015, respectively. The Company had $65.0 million and $70.7 million in loans classified as accruing restructured loans at June 30, 2016 and December 31, 2015, respectively.

Impaired loans by segment at June 30, 2016 and December 31, 2015 were as follows:

	June 30, 2016		December 31, 2015
	(in thousands)
Regional Segments
Arizona	$	17,958	$	22,400
Nevada	52,271		56,843
Southern California	2,640		3,181
Northern California	4,990		—
Total Regional Segments	77,859		82,424
National Business Lines
HOA	—		—
HFF	—		—
Public & Nonprofit	—		—
Technology & Innovation	12,522		10,022
Other NBL	159		196
Total NBL	12,681		10,218
Corporate & Other	25,926		36,232
Total impaired loans	$	116,466	$	128,874

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The following tables present a breakdown of total impaired loans and the related specific reserves for the periods indicated: 

	June 30, 2016
	Impaired Balance		Percent of Impaired Balance		Percent of Total HFI Loans		Reserve Balance		Percent of Reserve Balance		Percent of Total Allowance
	(dollars in thousands)
Commercial and industrial	$	32,374	27.80	%	0.25	%	$	5,060	79.12	%	4.14	%
Commercial real estate	50,627		43.46		0.40		1,207		18.87		0.99
Construction and land development	17,535		15.06		0.14		—		—		—
Residential real estate	15,667		13.45		0.12		127		1.99		0.11
Consumer	263		0.23		—		1		0.02		—
Total impaired loans	$	116,466	100.00	%	0.91	%	$	6,395	100.00	%	5.24	%

	December 31, 2015
	Impaired Balance		Percent of Impaired Balance		Percent of Total HFI Loans		Reserve Balance		Percent of Reserve Balance		Percent of Total Allowance
	(dollars in thousands)
Commercial and industrial	$	29,409	22.82	%	0.26	%	$	3,518	75.52	%	2.95	%
Commercial real estate	64,234		49.84		0.58		869		18.66		0.73
Construction and land development	18,322		14.22		0.17		—		—		—
Residential real estate	16,575		12.86		0.15		270		5.80		0.23
Consumer	334		0.26		—		1		0.02		—
Total impaired loans	$	128,874	100.00	%	1.16	%	$	4,658	100.00	%	3.91	%

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Allowance for Credit Losses

The following table summarizes the activity in the Company's allowance for credit losses for the period indicated: 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(dollars in thousands)
Allowance for credit losses:
Balance at beginning of period	$	119,227		$	112,098		$	119,068		$	110,216
Provision charged to operating expense:
Commercial and industrial	(252		)	2,028			5,638			5,590
Commercial real estate	1,237			(903		)	(2,074		)	(1,958		)
Construction and land development	1,903			165			2,257			(551		)
Residential real estate	(545		)	(1,233		)	(1,116		)	(2,156		)
Consumer	157			(57		)	295			(225		)
Total Provision	2,500			—			5,000			700
Recoveries of loans previously charged-off:
Commercial and industrial	(804		)	(681		)	(2,380		)	(1,597		)
Commercial real estate	(770		)	(1,738		)	(4,435		)	(2,121		)
Construction and land development	(58		)	(1,373		)	(153		)	(1,530		)
Residential real estate	(153		)	(1,184		)	(410		)	(1,717		)
Consumer	(43		)	(24		)	(110		)	(64		)
Total recoveries	(1,828		)	(5,000		)	(7,488		)	(7,029		)
Loans charged-off:
Commercial and industrial	1,161			1,771			8,652			2,164
Commercial real estate	244			—			654			—
Construction and land development	—			—			—			—
Residential real estate	—			218			26			618
Consumer	46			53			120			107
Total charged-off	1,451			2,042			9,452			2,889
Net (recoveries) charge-offs	(377		)	(2,958		)	1,964			(4,140		)
Balance at end of period	$	122,104		$	115,056		$	122,104		$	115,056
Net (recoveries) charge-offs to average loans - annualized	(0.01		)%	(0.13		)%	0.03		%	(0.10		)%
Allowance for credit losses to gross loans	0.95		%	1.11		%

The following table summarizes the allocation of the allowance for credit losses by loan type. However, the allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. 

	Commercial and Industrial			Commercial Real Estate			Construction and Land Development			Residential Real Estate			Consumer			Total
	(dollars in thousands)
June 30, 2016
Allowance for Credit Losses	$	70,547		$	24,867		$	21,386		$	4,546		$	758		$	122,104
Percent of Total Allowance for Credit Losses	57.8		%	20.4		%	17.5		%	3.7		%	0.6		%	100.0		%
Percent of Gross Loans to Total Gross HFI Loans	43.4			43.6			10.4			2.3			0.3			100.0
December 31, 2015
Allowance for Credit Losses	$	71,181		$	23,160		$	18,976		$	5,278		$	473		$	119,068
Percent of Total Allowance for Credit Losses	59.8		%	19.5		%	15.9		%	4.4		%	0.4		%	100.0		%
Percent of Gross Loans to Total Gross HFI Loans	47.4			39.3			10.2			2.9			0.2			100.0

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Problem Loans

The Company classifies loans consistent with federal banking regulations using a nine category grading system. These loan grades are described in further detail in "Item 1. Business” of the Company's Annual Report on Form 10-K for the year ended December 31, 2015. The following table presents information regarding potential and actual problem loans, consisting of loans graded Special Mention, Substandard, Doubtful, and Loss, but still performing, and excluding acquired loans: 

	June 30, 2016
	Number of Loans	Loan Balance		Percent of Loan Balance		Percent of Total HFI Loan Balance
	(dollars in thousands)
Commercial and industrial	87	$	59,388	45.01	%	0.46	%
Commercial real estate	53	42,191		31.97		0.33
Construction and land development	5	24,935		18.89		0.20
Residential real estate	10	5,258		3.98		0.04
Consumer	8	204		0.15		—
Total	163	$	131,976	100.00	%	1.03	%

	December 31, 2015
	Number of Loans	Loan Balance		Percent of Loan Balance		Percent of Total HFI Loan Balance
	(dollars in thousands)
Commercial and industrial	90	$	80,011	55.69	%	0.72	%
Commercial real estate	50	40,345		28.08		0.36
Construction and land development	3	17,734		12.34		0.16
Residential real estate	12	5,309		3.70		0.05
Consumer	8	271		0.19		—
Total	163	$	143,670	100.00	%	1.29	%

Other Assets Acquired Through Foreclosure

The following table represents the changes in other assets acquired through foreclosure: 

	Three Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	61,346		$	(8,570	)	$	52,776
Transfers to other assets acquired through foreclosure, net	88			—			88
Proceeds from sale of other real estate owned and repossessed assets, net	(4,480		)	1,813			(2,667		)
Valuation adjustments, net	—			134			134
Gains, net (1)	(489		)	—			(489		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	77,968		$	(14,209	)	$	63,759
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	5,739			—			5,739
Proceeds from sale of other real estate owned and repossessed assets, net	(15,415		)	2,480			(12,935		)
Valuation adjustments, net	—			(718		)	(718		)
Gains, net (1)	1,940			—			1,940
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(1) There were no net gains related to initial transfers to other assets during each of the three months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

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	Six Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	52,984		$	(9,042	)	$	43,942
Transfers to other assets acquired through foreclosure, net	10,726			—			10,726
Proceeds from sale of other real estate owned and repossessed assets, net	(6,916		)	2,108			(4,808		)
Valuation adjustments, net	—			311			311
Gains, net (2)	(329		)	—			(329		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	71,421		$	(14,271	)	$	57,150
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	13,459			—			13,459
Proceeds from sale of other real estate owned and repossessed assets, net	(17,703		)	3,328			(14,375		)
Valuation adjustments, net	—			(1,504		)	(1,504		)
Gains, net (2)	3,055			—			3,055
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(2) Includes net gains related to initial transfers to other assets of zero and $0.6 million during the six months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

Other assets acquired through foreclosure consist primarily of properties acquired as a result of, or in-lieu-of, foreclosure. OREO and other repossessed property are reported at the lower of carrying value or fair value less estimated costs to sell the property. Costs relating to the development or improvement of the assets are capitalized and costs relating to holding the assets are charged to expense. The Company had $49.8 million, $43.9 million, and $59.3 million of such assets at June 30, 2016, December 31, 2015, and June 30, 2015, respectively.

At June 30, 2016, the Company held 34 OREO properties, compared to 39 at December 31, 2015, and 56 at June 30, 2015.

Goodwill and Other Intangible Assets

Goodwill represents the excess consideration paid for net assets acquired in a business combination over their fair value. Goodwill and other intangible assets acquired in a business combination that are determined to have an indefinite useful life are not subject to amortization, but are subsequently evaluated for impairment at least annually. The Company has goodwill of $290.0 million and intangible assets totaling $14.3 million at June 30, 2016, which have been allocated to the Nevada, Northern California, HFF and Technology & Innovation operating segments.

The Company performs its annual goodwill and intangibles impairment tests as of October 1 each year, or more often if events or circumstances indicate that the carrying value may not be recoverable. During the three and six months endedJune 30, 2016 and 2015, and there were no events or circumstances that indicated an interim impairment test of goodwill or other intangible assets was necessary.

During the three and six months endedJune 30, 2016, the Company recognized $0.2 million in goodwill related to the HFF loan portfolio purchase and identified $0.8 million and $1.5 million, respectively, in measurement period adjustments from the Bridge acquisition, primarily related to reductions in other assets and accrued liabilities. As the measurement period for the Bridge acquisition ended on June 30, 2016, there will be no additional measurement period adjustments recorded as the fair values of these assets acquired and liabilities assumed are final.

Deferred Tax Assets

For the six months endedJune 30, 2016, the net deferred tax assets decreased $21.1 million to $65.3 million. This overall decrease in the net deferred tax asset was primarily the result of decreases to deferred tax assets from a change in the fair market value of junior subordinated debt and AFS securities, expected use of AMT credit carryovers, vesting of stock-based compensation awards, and fair market value adjustments related to acquired loans.

As of June 30, 2016 and December 31, 2015, the Company did not have a deferred tax valuation allowance.

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Deposits

Deposits are the primary source for funding the Company's asset growth. Total deposits increased to $14.20 billion at June 30, 2016, from $12.03 billion at December 31, 2015, an increase of $2.17 billion, or 18.0%. Non-interest-bearing demand deposits increased by $1.18 billion from December 31, 2015. Savings and money market deposits increased $708.9 million from December 31, 2015.

WAB is a member of Promontory, a network that offers deposit placement services such as CDARS and ICS, which offer products that qualify large deposits for FDIC insurance. At June 30, 2016, the Company had $447.3 million of CDARS deposits and $667.9 million of ICS deposits, compared to $517.5 million of CDARS deposits and $714.4 million of ICS deposits at December 31, 2015. At June 30, 2016 and December 31, 2015, the Company also had $172.0 million and $178.8 million, respectively, of wholesale brokered deposits. There was also $489.5 million and $365.6 million of additional deposits as of June 30, 2016 and December 31, 2015, respectively, that the Company considers core deposits, but which are classified as brokered deposits for regulatory reporting purposes.

The average balances and weighted average rates paid on deposits are presented below:

	Three Months Ended June 30,
	2016				2015
	Average Balance		Rate		Average Balance		Rate
	(dollars in thousands)
Interest checking (NOW)	$	1,194,171	0.17	%	$	971,609	0.17	%
Savings and money market	5,837,403		0.34		4,213,013		0.28
Time certificates of deposit	1,757,158		0.50		1,834,352		0.43
Total interest-bearing deposits	8,788,732		0.35		7,018,974		0.31
Non-interest-bearing demand deposits	4,772,582		—		2,593,543		—
Total deposits	$	13,561,314	0.23	%	$	9,612,517	0.22	%

	Six Months Ended June 30,
	2016				2015
	Average Balance		Rate		Average Balance		Rate
	(dollars in thousands)
Interest checking (NOW)	$	1,143,028	0.17	%	$	945,943	0.17	%
Savings and money market	5,585,654		0.32		4,062,052		0.28
Time certificates of deposit	1,659,327		0.48		1,884,643		0.42
Total interest-bearing deposits	8,388,009		0.33		6,892,638		0.30
Non-interest-bearing demand deposits	4,561,357		—		2,482,314		—
Total deposits	$	12,949,366	0.22	%	$	9,374,952	0.22	%

Other Borrowings

The Company from time to time utilizes short-term borrowed funds to support short-term liquidity needs generally created by increased loan demand. The majority of these short-term borrowed funds consist of advances from the FHLB and customer repurchase agreements. The Company’s borrowing capacity with the FHLB is determined based on collateral pledged, generally consisting of securities and loans. In addition, the Company has borrowing capacity from other sources, collateralized by securities, including securities sold under agreements to repurchase, which are reflected at the amount of cash received in connection with the transaction, and may require additional collateral based on the fair value of the underlying securities. At June 30, 2016, total short-term borrowed funds consisted of customer repurchase agreements of $38.5 million. At December 31, 2015, total short-term borrowed funds consisted of customer repurchase agreements of $38.2 million and FHLB advances of $150.0 million.

Qualifying Debt

At June 30, 2016, total qualifying debt consisted of $325.8 million of subordinated debt and junior subordinated debt of $56.3 million, inclusive of issuance costs and fair market value adjustments. At December 31, 2015, qualifying debt consisted of subordinated debt of $152.0 million and junior subordinated debt of $58.4 million.

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Critical Accounting Policies

Critical accounting policies are defined as those that are reflective of significant judgments and uncertainties and could potentially result in materially different results under different assumptions and conditions. The critical accounting policies upon which the Company's financial condition and results of operations depend, and which involve the most complex subjective decisions or assessments, are included in the discussion entitled "Critical Accounting Policies" in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations," in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2015, and all amendments thereto, as filed with the SEC. There were no material changes to the critical accounting policies disclosed in the Annual Report on Form 10-K.

Liquidity

Liquidity is the ongoing ability to accommodate liability maturities and deposit withdrawals, fund asset growth and business operations, and meet contractual obligations through unconstrained access to funding at reasonable market rates. Liquidity management involves forecasting funding requirements and maintaining sufficient capacity to meet the needs and accommodate fluctuations in asset and liability levels due to changes in the Company's business operations or unanticipated events.

The ability to have readily available funds sufficient to repay fully maturing liabilities is of primary importance to depositors, creditors, and regulators. The Company's liquidity, represented by cash and amounts due from banks, federal funds sold, and non-pledged marketable securities, is a result of its operating, investing, and financing activities and related cash flows. In order to ensure funds are available when necessary, on at least a quarterly basis, the Company projects the amount of funds that will be required over a twelve month period and it also strives to maintain relationships with a diversified customer base. Liquidity requirements can also be met through short-term borrowings or the disposition of short-term assets.

The following table presents the available and outstanding balances of the Company's lines of credit:

	June 30, 2016
	Available Balance		Outstanding Balance
	(in millions)
Unsecured fed funds credit lines at correspondent banks	$	100.0	$	0.2
Other lines with correspondent banks:
Secured other lines with correspondent banks	25.0		—
Unsecured other lines with correspondent banks	45.0		—
Total other lines with correspondent banks	$	70.0	$	—

In addition to lines of credit, the Company has borrowing capacity with the FHLB and FRB from pledged loans and securities. The borrowing capacity, outstanding borrowings, and available credit as of June 30, 2016 are presented in the following table:

	June 30, 2016
	(in millions)
FHLB:
Borrowing capacity	$	2,013.6
Outstanding borrowings	—
Letters of credit	468.2
Total available credit	$	1,545.4
FRB:
Borrowing capacity	$	1,082.7
Outstanding borrowings	—
Total available credit	$	1,082.7

The Company has a formal liquidity policy and, in the opinion of management, its liquid assets are considered adequate to meet cash flow needs for loan funding and deposit cash withdrawals for the next 90-120 days. At June 30, 2016, there was $1.88 billion in liquid assets, comprised of $696.4 million in cash, cash equivalents, and money market investments and $1.19 billion in unpledged marketable securities. At December 31, 2015, the Company maintained $1.26 billion in liquid assets, comprised

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of $224.8 million of cash, cash equivalents, and money market investments, and $1.04 billion of unpledged marketable securities.

The Parent maintains liquidity that would be sufficient to fund its operations and certain non-bank affiliate operations for an extended period should funding from normal sources be disrupted. Since deposits are taken by WAB and not by the Parent, Parent liquidity is not dependent on the bank's deposit balances. In the Company's analysis of Parent liquidity, it is assumed that the Parent is unable to generate funds from additional debt or equity issuances, receives no dividend income from subsidiaries and does not pay dividends to stockholders, while continuing to make nondiscretionary payments needed to maintain operations and repayment of contractual principal and interest payments owed by the Parent and affiliated companies. Under this scenario, the amount of time the Parent and its non-bank subsidiary can operate and meet all obligations before the current liquid assets are exhausted is considered as part of the Parent liquidity analysis. Management believes the Parent maintains adequate liquidity capacity to operate without additional funding from new sources for over twelve months.

WAB maintains sufficient funding capacity to address large increases in funding requirements, such as deposit outflows. This capacity is comprised of liquidity derived from a reduction in asset levels and various secured funding sources. On a long-term basis, the Company’s liquidity will be met by changing the relative distribution of its asset portfolios (for example, by reducing investment or loan volumes, or selling or encumbering assets). Further, the Company can increase liquidity by soliciting higher levels of deposit accounts through promotional activities and/or borrowing from correspondent banks, the FHLB of San Francisco, and the FRB. At June 30, 2016, the Company's long-term liquidity needs primarily relate to funds required to support loan originations, commitments, and deposit withdrawals, which can be met by cash flows from investment payments and maturities, and investment sales, if necessary.

The Company’s liquidity is comprised of three primary classifications: 1) cash flows provided by operating activities; 2) cash flows used in investing activities; and 3) cash flows provided by financing activities. Net cash provided by or used in operating activities consists primarily of net income, adjusted for changes in certain other asset and liability accounts and certain non-cash income and expense items, such as the provision for credit losses, investment and other amortization and depreciation. For the six months endedJune 30, 2016, and 2015, net cash provided by operating activities was $115.1 million and $89.1 million respectively.

The Company's primary investing activities are the origination of real estate and commercial loans, the collection of repayments of these loans, and the purchase and sale of securities. The Company's net cash provided by and used in investing activities has been primarily influenced by its loan and securities activities. The net increase in loans for the six months endedJune 30, 2016 and 2015 was $401.7 million and $515.1 million, respectively. There was a net increase in investment securities for the six months endedJune 30, 2016 of $187.3 million, compared to a net decrease of $97.8 million for the six months endedJune 30, 2015

Net cash provided by financing activities has been impacted significantly by increased deposit levels. During the six months endedJune 30, 2016 and 2015, net deposits increased $2.17 billion and $733.8 million, respectively.

Fluctuations in core deposit levels may increase the Company's need for liquidity as certificates of deposit mature or are withdrawn before maturity, and as non-maturity deposits, such as checking and savings account balances, are withdrawn. Additionally, the Company is exposed to the risk that customers with large deposit balances will withdraw all or a portion of such deposits, due in part to the FDIC limitations on the amount of insurance coverage provided to depositors. To mitigate the uninsured deposit risk, the Company has joined the CDARS and ICS programs, which allow an individual customer to invest up to $50.0 million and $110.0 million, respectively, through one participating financial institution or, a combined total of $150.0 million per individual customer, with the entire amount being covered by FDIC insurance. As of June 30, 2016, the Company had $447.3 million of CDARS and $667.9 million of ICS deposits.

As of June 30, 2016, the Company had $172.0 million of wholesale brokered deposits outstanding. Brokered deposits are generally considered to be deposits that have been received from a third party who is engaged in the business of placing deposits on behalf of others. A traditional deposit broker will direct deposits to the banking institution offering the highest interest rate available. Federal banking laws and regulations place restrictions on depository institutions regarding brokered deposits because of the general concern that these deposits are not relationship based and are at a greater risk of being withdrawn and placed on deposit at another institution offering a higher interest rate, thus posing liquidity risk for institutions that gather brokered deposits in significant amounts. There was also $489.5 million and $365.6 million of additional deposits as of June 30, 2016 and December 31, 2015, respectively, that the Company considers core deposits, but which are classified as brokered deposits for regulatory reporting purposes.

Federal and state banking regulations place certain restrictions on dividends paid. The total amount of dividends which may be paid at any date is generally limited to the retained earnings of the bank. Dividends paid by WAB to the Parent would be prohibited if the effect thereof would cause the bank’s capital to be reduced below applicable minimum capital requirements.

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During the six months endedJune 30, 2016, the Parent contributed $50.8 million to WAB and $226.9 million to LVSP and LVSP paid a dividend to the Parent of $1.5 million.

Capital Resources

The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements could trigger certain mandatory or discretionary actions that, if undertaken, could have a direct material effect on the Company’s business and financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.

As of June 30, 2016 and December 31, 2015, the Company and the Bank exceeded the capital levels necessary to be classified as well-capitalized, as defined by the banking agencies. The actual capital amounts and ratios for the Company and the Bank are presented in the following tables as of the periods indicated:

	Total Capital		Tier 1 Capital		Risk-Weighted Assets		Tangible Average Assets		Total Capital Ratio		Tier 1 Capital Ratio		Tier 1 Leverage Ratio		Common Equity Tier 1
	(dollars in thousands)
June 30, 2016
WAL	$	1,955,292	$	1,525,357	$	15,189,237	$	15,578,938	12.9	%	10.0	%	9.8	%	9.6	%
WAB	1,840,540		1,565,232		15,091,901		15,489,201		12.2		10.4		10.1		10.4
Well-capitalized ratios									10.0		8.0		5.0		6.5
Minimum capital ratios									8.0		6.0		4.0		4.5
December 31, 2015
WAL	$	1,603,472	$	1,341,011	$	13,193,563	$	13,683,148	12.2	%	10.2	%	9.8	%	9.7	%
WAB	$	1,485,070	$	1,213,304	$	13,073,394	$	13,561,251	11.4		9.3		9.0		9.3
Well-capitalized ratios									10.0		8.0		5.0		6.5
Minimum capital ratios									8.0		6.0		4.0		4.5

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Item 3. Quantitative and Qualitative Disclosures about Market Risk.

Market risk is the risk of loss in a financial instrument arising from adverse changes in market prices and rates, foreign currency exchange rates, commodity prices, and equity prices. The Company's market risk arises primarily from interest rate risk inherent in its lending, investing, and deposit taking activities. To that end, management actively monitors and manages the Company's interest rate risk exposure. The Company generally manages its interest rate sensitivity by evaluating re-pricing opportunities on its earning assets to those on its funding liabilities.

Management uses various asset/liability strategies to manage the re-pricing characteristics of the Company's assets and liabilities, all of which are designed to ensure that exposure to interest rate fluctuations is limited to within the Company's guidelines of acceptable levels of risk-taking. Hedging strategies, including the terms and pricing of loans and deposits and management of the deployment of its securities, are used to reduce mismatches in interest rate re-pricing opportunities of portfolio assets and their funding sources.

Interest rate risk is addressed by the ALCO, which includes members of executive management, finance, and operations. ALCO monitors interest rate risk by analyzing the potential impact on the net EVE and net interest income from potential changes in interest rates and considers the impact of alternative strategies or changes in balance sheet structure. The Company manages its balance sheet in part to maintain the potential impact on EVE and net interest income within acceptable ranges despite changes in interest rates.

The Company's exposure to interest rate risk is reviewed at least quarterly by the ALCO. Interest rate risk exposure is measured using interest rate sensitivity analysis to determine its change in both EVE and net interest income in the event of hypothetical changes in interest rates. If potential changes to EVE and net interest income resulting from hypothetical interest rate changes are not within the limits established by the Bank’s BOD, the BOD may direct management to adjust the asset and liability mix to bring interest rate risk within Board-approved limits.

Net Interest Income Simulation. In order to measure interest rate risk at June 30, 2016, the Company used a simulation model to project changes in net interest income that result from forecasted changes in interest rates. This analysis calculates the difference between a baseline net interest income forecast using current yield curves that do not take into consideration any future anticipated rate hikes, compared to forecasted net income resulting from an immediate parallel shift in rates upward or downward, along with other scenarios directed by ALCO. The income simulation model includes various assumptions regarding the re-pricing relationships for each of the Company's products. Many of the Company's assets are floating rate loans, which are assumed to re-price immediately and, proportional to the change in market rates, depending on their contracted index. Some loans and investments contain contractual prepayment features (embedded options) and, accordingly, the simulation model incorporates prepayment assumptions. The Company's non-term deposit products re-price more slowly, usually changing less than the change in market rates and at the Company's discretion.

This analysis indicates the impact of changes in net interest income for the given set of rate changes and assumptions. It assumes the balance sheet remains static and that its structure does not change over the course of the year. It does not account for all factors that could impact the Company's results, including changes by management to mitigate interest rate changes or secondary factors such as changes to the Company's credit risk profile as interest rates change.

Furthermore, loan prepayment rate estimates and spread relationships change regularly. Interest rate changes create changes in actual loan prepayment speeds that will differ from the market estimates incorporated in this analysis. Changes that vary significantly from the modeled assumptions may have significant effects on the Company's actual net interest income.

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This simulation model assesses the changes in net interest income that would occur in response to an instantaneous and sustained increase or decrease (shock) in market interest rates. At June 30, 2016, the Company's net interest income exposure for the next twelve months related to these hypothetical changes in market interest rates was within the Company's current guidelines.

Sensitivity of Net Interest Income

	Interest Rate Scenario (change in basis points from Base)
	Down 100			Base		Up 100			Up 200			Up 300			Up 400
	(in thousands)
Interest Income	$	670,526		$	712,726	$	790,960		$	873,973		$	958,984		$	1,044,902
Interest Expense	31,393			49,827		87,575			125,328			163,084			200,843
Net Interest Income	639,133			662,899		703,385			748,645			795,900			844,059
% Change	(3.6		)%			6.1		%	12.9		%	20.1		%	27.3		%

Economic Value of Equity. The Company measures the impact of market interest rate changes on the NPV of estimated cash flows from its assets, liabilities, and off-balance sheet items, defined as EVE, using a simulation model. This simulation model, which includes Bridge, assesses the changes in the market value of interest rate sensitive financial instruments that would occur in response to an instantaneous and sustained increase or decrease (shock) in market interest rates.

At June 30, 2016, the Company's EVE exposure related to these hypothetical changes in market interest rates was within the Company's current guidelines. The following table shows the Company's projected change in EVE for this set of rate shocks at June 30, 2016:

Economic Value of Equity

	Interest Rate Scenario (change in basis points from Base)
	Down 100			Base		Up 100			Up 200			Up 300			Up 400
	(in thousands)
Assets	$	17,121,723		$	16,902,799	$	16,638,974		$	16,372,435		$	16,115,589		$	15,867,104
Liabilities	14,318,123			13,896,457		13,535,286			13,209,045			12,908,021			12,629,676
Net Present Value	2,803,600			3,006,342		3,103,688			3,163,390			3,207,568			3,237,428
% Change	(6.7		)%			3.2		%	5.2		%	6.7		%	7.7		%

The computation of prospective effects of hypothetical interest rate changes are based on numerous assumptions, including relative levels of market interest rates, asset prepayments, and deposit decay, and should not be relied upon as indicative of actual results. Further, the computations do not contemplate any actions the Company may undertake in response to changes in interest rates. Actual amounts may differ from the projections set forth above should market conditions vary from the underlying assumptions.

Derivative Contracts. In the normal course of business, the Company uses derivative instruments to meet the needs of its customers and manage exposure to fluctuations in interest rates. The following table summarizes the aggregate notional amounts, market values, and terms of the Company’s derivative positions as of June 30, 2016 and December 31, 2015:

Outstanding Derivatives Positions

June 30, 2016						December 31, 2015
Notional		Net Value			Weighted Average Term (Years)	Notional		Net Value			Weighted Average Term (Years)
(dollars in thousands)
$	970,382	$	(99,340	)	18.7	$	800,478	$	(61,216	)	14.5

87

Item 4. Controls and Procedures.

Evaluation of Disclosure Controls

Based on their evaluation as of the end of the period covered by this Quarterly Report on Form 10-Q, the CEO and CFO have concluded that the disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) are effective to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act, as amended, is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms. Additionally, the Company's disclosure controls and procedures were also effective in ensuring that information required to be disclosed by the Company in the reports it files or is subject to under the Exchange Act is accumulated and communicated to the Company's management, including the CEO and CFO, to allow timely decisions regarding required disclosures.

Changes in Internal Control over Financial Reporting

There have not been any changes in the Company's internal control over financial reporting during the quarter ended June 30, 2016, which have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

88

PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

There are no material pending legal proceedings to which the Company is a party or to which any of its properties are subject. There are no material proceedings known to the Company to be contemplated by any governmental authority. From time to time, the Company is involved in a variety of litigation matters in the ordinary course of business and anticipates that the Company will become involved in new litigation matters in the future.

Item 1A. Risk Factors.

There have not been any material changes to the risk factors previously disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

Item 5. Other Information.

Not applicable.

89

Item 6. Exhibits.

EXHIBITS

3.1	Certificate of Incorporation, as filed with the Delaware Secretary of State on May 29, 2014 (incorporated by reference to Exhibit 3.3 of Western Alliance’s Form 8-K filed with the SEC on June 3, 2014).
3.2	Certificate of Designation of Non-Cumulative Perpetual Preferred Stock, Series B, as filed with the Delaware Secretary of State on May 29, 2014 (incorporated by reference to Exhibit 3.4 of Western Alliance’s Form 8-K filed with the SEC on June 3, 2014).
3.3	Amended and Restated Bylaws of Western Alliance, effective as of May 19, 2015 (incorporated by reference to Exhibit 3.2 of Western Alliance's Form 8-K filed with the SEC on May 22, 2015).
4.1	Form of Common Stock Certificate (incorporated by reference to Exhibit 4.1 of Western Alliance’s Form 8-K filed with the SEC on June 3, 2014).
4.2	Senior Debt Indenture, dated August 25, 2010, between Western Alliance and Wells Fargo Bank, National Association, as trustee. (incorporated by reference to Exhibit 4.1 of Western Alliance’s Form 8-K filed with the SEC on August 25, 2010).
4.3	First Supplemental Indenture, dated August 25, 2010, between Western Alliance and Wells Fargo Bank, National Association, as trustee. (incorporated by reference to Exhibit 4.2 of Western Alliance’s Form 8-K filed with the SEC on August 25, 2010).
4.4	Form of 10.00% Senior Notes due 2015 (incorporated by reference to Exhibit 4.3 of Western Alliance’s Form 8-K filed with the SEC on August 25, 2010).
4.5	Form of Non-Cumulative Perpetual Preferred Stock, Series B, stock certificate (incorporated by reference to Exhibit 4.8 of Western Alliance’s Annual Report on form 10-K filed with the SEC on March 2, 2012).
4.6	Form of Senior Debt Indenture (incorporated by reference to Exhibit 4.2 of Western Alliance's Form S-3 filed with the SEC on May 7, 2015).
4.7	Form of Subordinated Debt Indenture (incorporated by reference to Exhibit 4.3 of Western Alliance's Form S-3 filed with the SEC on May 7, 2015).
4.8	Form of 5.00% Fixed to Floating Rate Subordinated Bank Note due July 15, 2025 (incorporated by reference to Exhibit 4.1 of Western Alliance's Form 8-K filed with the SEC on July 2, 2015).

31.1*	CEO Certification Pursuant Rule 13a-14(a)/15d-14(a).
31.2*	CFO Certification Pursuant Rule 13a-14(a)/15d-14(a).
32*	CEO and CFO Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 906 of the Sarbanes Oxley Act of 2002.
101.INS*	XBRL Instance Document.
101.SCH*	XBRL Taxonomy Extension Schema Document.
101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document.
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document.

* Filed herewith.

90

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	WESTERN ALLIANCE BANCORPORATION
July 29, 2016	By:	/s/ Robert Sarver
		Robert Sarver
		Chairman of the Board and
		Chief Executive Officer
July 29, 2016	By:	/s/ Dale Gibbons
		Dale Gibbons
		Executive Vice President and
		Chief Financial Officer
July 29, 2016	By:	/s/ J. Kelly Ardrey Jr.
		J. Kelly Ardrey Jr.
		Senior Vice President and
		Chief Accounting Officer

91

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Robert Sarver, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Western Alliance Bancorporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

		/s/ Robert Sarver
		Robert Sarver
		Chief Executive Officer
Date:	July 29, 2016	Western Alliance Bancorporation

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Dale Gibbons, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Western Alliance Bancorporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

		/s/ Dale Gibbons
		Dale Gibbons
		Chief Financial Officer
Date:	July 29, 2016	Western Alliance Bancorporation

EX-32

EXHIBIT 32

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

This certification is given by the undersigned Chief Executive Officer and Chief Financial Officer of Western Alliance Bancorporation (the “Registrant”) pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Each of the undersigned hereby certifies, with respect to the Registrant's quarterly report on Form 10-Q for the quarter ended June 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), that, to each of their knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date:	July 29, 2016	/s/ Robert Sarver
		Chief Executive Officer
		Western Alliance Bancorporation
Date:	July 29, 2016	/s/ Dale Gibbons
		Chief Financial Officer
		Western Alliance Bancorporation

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 25, 2016
Document Document And Entity Information [Abstract]
Entity Registrant Name	WESTERN ALLIANCE BANCORPORATION
Entity Central Index Key	0001212545
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Trading Symbol	WAL
Entity Common Stock, Shares Outstanding		105,072,142
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets:
Cash and due from banks	$ 147,570	$ 133,709
Interest-bearing deposits in other financial institutions	548,673	90,931
Cash and cash equivalents	696,243	224,640
Money market investments	109	122
Investment securities - measured at fair value; amortized cost of $1,240 at June 30, 2016 and $1,389 at December 31, 2015	1,326	1,481
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,165,539	1,982,523
Investment securities - HTM, at amortized cost; fair value of $41,162 at June 30, 2016 and $0 at December 31, 2015	36,929	0
Investments in restricted stock, at cost	58,682	58,111
Loans - HFS	22,336	23,809
Loans:
Loans - HFI, net of deferred loan fees and costs	12,855,511	11,112,854
Less: allowance for credit losses	(122,104)	(119,068)
Net loans held for investment	12,733,407	10,993,786
Premises and equipment, net	120,518	118,535
Other assets acquired through foreclosure, net	49,842	43,942
Bank owned life insurance	164,283	162,458
Goodwill	289,967	289,638
Other intangible assets, net	14,322	15,716
Deferred tax assets, net	65,275	86,352
Other assets	309,989	273,976
Total assets	16,728,767	14,275,089
Deposits:
Non-interest-bearing demand	5,275,098	4,093,976
Interest-bearing	8,926,259	7,936,648
Total deposits	14,201,357	12,030,624
Customer repurchase agreements	38,492	38,155
Other borrowings	0	150,000
Qualifying debt	382,103	210,328
Other liabilities	310,605	254,480
Total liabilities	14,932,557	12,683,587
Commitments and Contingencies
Stockholders’ equity:
Common stock - par value $0.0001; 200,000,000 authorized; 106,372,182 shares issued at June 30, 2016 and 104,082,230 at December 31, 2015	10	10
Additional paid in capital	1,389,914	1,323,473
Treasury stock, at cost (1,288,353 shares at June 30, 2016 and 995,186 shares at December 31, 2015)	(25,924)	(16,879)
Accumulated other comprehensive income	46,626	22,260
Retained earnings	385,584	262,638
Total stockholders’ equity	1,796,210	1,591,502
Total liabilities and stockholders’ equity	$ 16,728,767	$ 14,275,089

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Amortized cost of investment securities	$ 1,240	$ 1,389
Amortized cost of investment securities available for sale	2,111,418	1,966,034
Fair value of HTM investment securities	$ 41,162	$ 0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock, shares issued (shares)	106,372,182	104,082,230
Treasury stock (shares)	1,288,353	995,186

XML

CONSOLIDATED INCOME STATEMENTS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest and dividend income:
Loans, including fees	$ 160,015	$ 105,468	$ 299,801	$ 205,859
Investment securities	11,456	8,003	23,482	16,516
Dividends	1,994	3,082	4,007	5,087
Other	624	65	1,055	118
Total interest income	174,089	116,618	328,345	227,580
Interest expense:
Deposits	7,678	5,362	13,921	10,508
Qualifying debt	2,514	480	4,698	920
Other borrowings	197	2,039	298	4,284
Other	14	19	31	42
Total interest expense	10,403	7,900	18,948	15,754
Net interest income	163,686	108,718	309,397	211,826
Provision for credit losses	2,500	0	5,000	700
Net interest income after provision for credit losses	161,186	108,718	304,397	211,126
Non-interest income:
Service charges and fees	4,506	3,128	8,972	6,017
Lending related income and gains (losses) on sale of loans, net	253	118	4,194	319
Card income	1,078	899	2,091	1,712
Gain (loss) on sales of investment securities, net	0	55	1,001	644
Income from bank owned life insurance	1,029	772	1,959	1,749
Other income	1,693	573	3,475	1,346
Total non-interest income	8,559	5,545	21,692	11,787
Non-interest expense:
Salaries and employee benefits	44,711	32,406	89,566	64,947
Occupancy	7,246	4,949	13,503	9,762
Data processing	5,868	2,683	10,429	5,809
Legal, professional, and directors' fees	5,747	4,611	11,319	8,606
Insurance	2,963	2,274	6,286	4,364
Marketing	1,097	463	1,754	840
Loan and repossessed asset expenses	832	1,284	1,734	2,374
Card expense	824	613	1,711	1,087
Intangible amortization	697	281	1,394	562
Net loss (gain) on sales / valuations of repossessed and other assets	357	(1,218)	55	(1,569)
Acquisition / restructure expense	3,662	7,842	3,662	8,001
Other expense	7,800	5,021	15,884	10,459
Total non-interest expense	81,804	61,209	157,297	115,242
Income before provision for income taxes	87,941	53,054	168,792	107,671
Income tax expense	26,327	13,579	45,846	27,813
Net income	61,614	39,475	122,946	79,858
Dividends on preferred stock	0	247	0	423
Net income available to common stockholders	$ 61,614	$ 39,228	$ 122,946	$ 79,435
Earnings per share available to common stockholders:
Basic (in dollars per share)	$ 0.60	$ 0.44	$ 1.20	$ 0.90
Diluted (in dollars per share)	$ 0.60	$ 0.44	$ 1.19	$ 0.90
Weighted average number of common shares outstanding:
Basic (shares)	102,688	88,177	102,294	88,059
Diluted (shares)	103,472	88,682	103,007	88,567
Dividends declared per common share (in dollars per share)	$ 0	$ 0	$ 0	$ 0

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 61,614	$ 39,475	$ 122,946	$ 79,858
Other comprehensive income (loss), net:
Unrealized gain (loss) on AFS securities, net of tax effect of $(8,008), $5,135, $(12,508) and $858, respectively	12,712	(8,378)	23,731	(1,225)
Unrealized gain (loss) on SERP, net of tax effect of $(4), $(207), $(6) and $(207), respectively	6	337	12	337
Unrealized gain (loss) on junior subordinated debt, net of tax effect of $(431), $2,980, $(884) and $3,095, respectively	575	(4,756)	1,334	(4,950)
Realized (gain) loss on sale of AFS securities included in income, net of tax effect of $0, $21, $290 and $241, respectively	0	(34)	(711)	(403)
Net other comprehensive income (loss)	13,293	(12,831)	24,366	(6,241)
Comprehensive income	$ 74,907	$ 26,644	$ 147,312	$ 73,617

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Unrealized gain on securities available-for-sale securities, tax	$ (8,008)	$ 5,135	$ (12,508)	$ 858
Unrealized gain on SERP, tax	(4)	(207)	(6)	(207)
Unrealized gain on junior subordinated debt, tax	(431)	(2,980)	(884)	3,095
Realized gain on sale of securities, tax	$ 0	$ 21	$ 290	$ 241

XML

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands		Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]
Beginning balance at Dec. 31, 2014	[1]	$ 1,000,928	$ 70,500	$ 9	$ 837,603	$ (9,276)	$ 32,948	$ 69,144
Beginning balance, shares at Dec. 31, 2014	[1]		71,000	88,691,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		79,858						79,858
Exercise of stock options		1,537			1,537
Exercise of stock options, shares				145,000
Restricted stock, performance stock units, and other grants, net		15,000			15,000
Restricted stock, performance stock units, and other grants, net, shares				713,000
Restricted stock surrendered		$ (6,947)				(6,947)
Restricted stock surrendered (shares)		(254,781.000)		(255,000)
Issuance of common stock	[2]	$ 431,031		$ 1	431,030
Issuance of common stock, shares	[2]			12,997,000
Dividends on preferred stock		(423)						(423)
Net other comprehensive income (loss), net		(6,241)					(6,241)
Ending balance at Jun. 30, 2015		1,514,743	$ 70,500	$ 10	1,285,170	(16,223)	26,707	148,579
Ending balance, shares at Jun. 30, 2015			71,000	102,291,000
Beginning balance at Dec. 31, 2015		1,591,502	$ 0	$ 10	1,323,473	(16,879)	22,260	262,638
Beginning balance, shares at Dec. 31, 2015			0	103,087,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		122,946						122,946
Exercise of stock options		519			519
Exercise of stock options, shares				53,000
Restricted stock, performance stock units, and other grants, net		10,137			10,137
Restricted stock, performance stock units, and other grants, net, shares				687,000
Restricted stock surrendered		$ (9,045)				(9,045)
Restricted stock surrendered (shares)		(293,167.000)		(293,000)
Issuance of common stock		$ 55,785			55,785
Issuance of common stock, shares				1,550,000
Net other comprehensive income (loss), net		24,366					24,366
Ending balance at Jun. 30, 2016		$ 1,796,210	$ 0	$ 10	$ 1,389,914	$ (25,924)	$ 46,626	$ 385,584
Ending balance, shares at Jun. 30, 2016			0	105,084,000

[1] As adjusted, see Treasury Shares section in "Note 1. Summary of Significant Accounting Policies" for further discussion.

[2] Includes value of certain share-based awards replaced in connection with the acquisition.

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Cash Flows [Abstract]
Payments to Acquire Restricted Investments	$ (571)	$ (18,749)
Cash flows from operating activities:
Net income	(122,946)	(79,858)
Adjustments to reconcile net income to cash provided by operating activities:
Provision for credit losses	5,000	700
Depreciation and amortization	6,136	3,943
Stock-based compensation	10,317	7,908
Excess tax benefit of stock-based compensation	(3,899)	(5,164)
Deferred income taxes	5,173	(2,345)
Amortization of net premiums for investment securities	6,229	4,133
Accretion and amortization of fair market value adjustments on loans acquired from business combinations	(13,485)	(4,118)
Accretion and amortization of fair market value adjustments on other assets and liabilities acquired from business combinations, net	1,549	247
Income from bank owned life insurance	(1,959)	(1,749)
(Gains) / Losses on:
Sales of investment securities	(1,001)	(644)
Sale of loans	(2,213)	(319)
Extinguishment of debt	0	81
Other assets acquired through foreclosure, net	329	(3,055)
Valuation adjustments of other repossessed assets, net	(311)	1,504
Sale of premises, equipment, and other assets, net	37	(18)
Changes in:
Other assets	(2,892)	11,946
Other liabilities	(16,819)	(3,844)
Net cash provided by operating activities	115,137	89,064
Investment securities - measured at fair value
Principal pay downs and maturities	150	143
Investment securities - AFS
Purchases	(361,195)	(94,532)
Principal pay downs and maturities	176,410	114,127
Proceeds from sales	34,304	78,040
Investment securities - HTM
Purchases	(37,030)	0
Principal pay downs and maturities	25	0
Purchase of investment tax credits	(17,773)	(11,884)
Sale (purchase) of money market investments, net	12	(424)
Loan fundings and principal collections, net	(401,692)	(515,143)
Purchase of premises, equipment, and other assets, net	(6,592)	(3,886)
Proceeds from sale of other real estate owned and repossessed assets, net	4,808	14,375
Cash and cash equivalents (used) acquired in acquisitions, net	(1,272,187)	342,427
Net cash used in investing activities	(1,881,331)	(95,506)
Cash flows from financing activities:
Net increase (decrease) in deposits	2,170,733	733,788
Proceeds from issuance of subordinated debt	169,470	148,450
Net (decrease) increase in borrowings	(149,665)	(276,023)
Proceeds from exercise of common stock options	519	1,537
Cash paid for tax withholding on vested restricted stock	(9,045)	(6,947)
Cash dividends paid on preferred stock	0	(423)
Proceeds from issuance of stock in offerings, net	55,785	0
Net cash provided by financing activities	2,237,797	600,382
Net increase in cash and cash equivalents	471,603	593,940
Cash and cash equivalents at beginning of period	224,640	164,396
Cash and cash equivalents at end of period	696,243	758,336
Cash paid during the period for:
Interest	18,206	13,881
Income tax payments	27,176	25,801
Non-cash investing and financing activity:
Transfers to other assets acquired through foreclosure, net	10,726	13,459
Change in unfunded investment tax credits and SBIC commitments	27,000	2,168
Non-cash assets acquired in acquisition	1,284,557	1,590,927
Non-cash liabilities acquired in acquisition	12,559	1,761,951
Change in unrealized gain (loss) on AFS securities, net of tax	23,019	(1,628)
Change in unrealized gain (loss) on TRUP securities, net of tax	1,334	(4,950)
Change in unfunded obligations	$ (12,966)	$ 13,654

XML

Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2016

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of operation

WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of deposit, lending, treasury management, and online banking products and services through its wholly-owned banking subsidiary, WAB.

WAB operates the following full-service banking divisions: ABA in Arizona, BON and FIB in Nevada, Bridge in Northern California, and TPB in Southern California. The Company also serves business customers through a national platform of specialized financial services including AAB, Corporate Finance, Equity Fund Resources, HFF, Life Sciences Group, Mortgage Warehouse Lending, Public and Nonprofit Finance, Renewable Resource Group, Resort Finance, and Technology Finance. In addition, the Company has one non-bank subsidiary, LVSP, which holds and manages certain non-performing loans and OREO.

Basis of presentation

The accounting and reporting policies of the Company are in accordance with GAAP and conform to practices within the financial services industry. The accounts of the Company and its consolidated subsidiaries are included in the Unaudited Consolidated Financial Statements.

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management evaluates these estimates and judgments on an ongoing basis and bases its estimates on experience, current and expected future conditions, third-party evaluations and various other assumptions that management believes are reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from those estimates and assumptions used in the Unaudited Consolidated Financial Statements and related notes. Material estimates that are particularly susceptible to significant changes in the near term relate to the determination of the allowance for credit losses; estimated cash flows related to PCI loans; fair value determinations related to acquisitions and other assets and liabilities carried at fair value; and accounting for income taxes.

Principles of consolidation

As of June 30, 2016, WAL has ten wholly-owned subsidiaries: WAB, LVSP, and eight unconsolidated subsidiaries used as business trusts in connection with the issuance of trust-preferred securities.

The Bank has the following significant wholly-owned subsidiaries: WAB Investments, Inc., BON Investments, Inc., and TPB Investments, Inc., which hold certain investment securities, municipal and nonprofit loans, and leases; and BW Real Estate, Inc., which operates as a real estate investment trust and holds certain of WAB's real estate loans and related securities.

The Company does not have any other significant entities that should be considered for consolidation. All significant intercompany balances and transactions have been eliminated in consolidation.

Reclassifications

Certain amounts in the Consolidated Financial Statements as of December 31, 2015 and for the three and six months endedJune 30, 2015 have been reclassified to conform to the current presentation. The reclassifications have no effect on net income or stockholders’ equity as previously reported.

Interim financial information

The accompanying Unaudited Consolidated Financial Statements as of and for the three and six months endedJune 30, 2016 and 2015 have been prepared in condensed format and, therefore, do not include all of the information and footnotes required by GAAP for complete financial statements. These statements have been prepared on a basis that is substantially consistent with the accounting principles applied to the Company's audited Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

The information furnished in these interim statements reflects all adjustments which are, in the opinion of management, necessary for a fair statement of the results for each respective period presented. Such adjustments are of a normal, recurring nature. The results of operations in the interim statements are not necessarily indicative of the results that may be expected for any other quarter or for the full year. The interim financial information should be read in conjunction with the Company's audited Consolidated Financial Statements

Business combinations

Business combinations are accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations. Under the acquisition method, the acquiring entity in a business combination recognizes all of the acquired assets and assumed liabilities at their estimated fair values as of the date of acquisition. Any excess of the purchase price over the fair value of net assets and other identifiable intangible assets acquired is recorded as goodwill. To the extent the fair value of net assets acquired, including identified intangible assets, exceeds the purchase price, a bargain purchase gain is recognized. Changes to estimated fair values from a business combination are recognized as an adjustment to goodwill during the measurement period and are recognized in the reporting period in which the adjustment amounts are determined. Results of operations of an acquired business are included in the Consolidated Income Statement from the date of acquisition. Acquisition-related costs, including conversion and restructuring charges, are expensed as incurred.

Investment securities

Investment securities may be classified as HTM, AFS, or measured at fair value. The appropriate classification is initially decided at the time of purchase. Securities classified as HTM are those debt securities that the Company has both the intent and ability to hold to maturity regardless of changes in market conditions, liquidity needs, or general economic conditions. These securities are carried at amortized cost. The sale of a security within three months of its maturity date or after the majority of the principal outstanding has been collected is considered a maturity for purposes of classification and disclosure.

In May 2014, management reassessed its intent to hold certain CDOs classified as HTM, which necessitated a reclassification of all of the Company's HTM securities to AFS at the date of the transfer. As an extended period of time has passed since this reclassification was made, management believes that the Company is again able to assert as of March 31, 2016 that it has both the intent and ability to hold certain securities classified as HTM to maturity. See "Note 2. Investment Securities" of these Notes to Unaudited Consolidated Financial Statements for additional detail related to HTM securities.

Securities classified as AFS or trading securities measured at fair value are reported as an asset in the Consolidated Balance Sheet at their estimated fair value. As the fair value of AFS securities changes, the changes are reported net of income tax as an element of OCI, except for other-than-temporarily-impaired securities. When AFS securities are sold, the unrealized gain or loss is reclassified from OCI to non-interest income. The changes in the fair values of trading securities are reported in non-interest income. Securities classified as AFS are both equity and debt securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity. Any decision to sell a security classified as AFS would be based on various factors, including significant movements in interest rates, changes in the maturity mix of the Company’s assets and liabilities, liquidity needs, decline in credit quality, and regulatory capital considerations.

Interest income is recognized based on the coupon rate and increased by accretion of discounts earned or decreased by the amortization of premiums paid over the contractual life of the security, adjusted for prepayment estimates, using the interest method.

In estimating whether there are any OTTI losses, management considers the 1) length of time and the extent to which the fair value has been less than amortized cost; 2) financial condition and near term prospects of the issuer; 3) impact of changes in market interest rates; and 4) intent and ability of the Company to retain its investment for a period of time sufficient to allow for any anticipated recovery in fair value and whether it is not more likely than not the Company would be required to sell the security.

Declines in the fair value of individual AFS debt securities that are deemed to be other-than-temporary are reflected in earnings when identified. The fair value of the debt security then becomes the new cost basis. For individual debt securities where the Company does not intend to sell the security and it is not more likely than not that the Company will be required to sell the security before recovery of its amortized cost basis, the other-than-temporary decline in fair value of the debt security related to 1) credit loss is recognized in earnings; and 2) interest rate, market, or other factors is recognized in other comprehensive income or loss.

For individual debt securities where the Company either intends to sell the security or more likely than not will not recover all of its amortized cost, the OTTI is recognized in earnings equal to the entire difference between the security's cost basis and its fair value at the balance sheet date. For individual debt securities for which a credit loss has been recognized in earnings, interest accruals and amortization and accretion of premiums and discounts are suspended when the credit loss is recognized. Interest received after accruals have been suspended is recognized on a cash basis.

Restricted stock

On January 30, 2015, WAB became a member of the Federal Reserve System and, as part of its membership, is required to maintain stock in the FRB in a specified ratio to its capital. In addition, WAB is a member of the FHLB system and, accordingly, maintains an investment in capital stock of the FHLB based on the borrowing capacity used. The Bank also maintains an investment in its primary correspondent bank. All of these investments are considered equity securities with no actively traded market. Therefore, the shares are considered restricted investment securities. These investments are carried at cost, which is equal to the value at which they may be redeemed. The dividend income received from the stock is reported in interest income. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists. No impairment has been recorded to date.

Loans, held for sale

Loans, held for sale consist primarily of SBA and CRE loans that the Company originates (or acquires) and intends to sell. These loans are carried at the lower of aggregate cost or fair value. Fair value is determined based on available market data for similar assets, expected cash flows, and appraisals of underlying collateral or the credit quality of the borrower. Gains and losses on the sale of loans are recognized pursuant to ASC 860, Transfers and Servicing. Interest income of these loans is accrued daily and loan origination fees and costs are deferred and included in the cost basis of the loan. The Company issues various representations and warranties associated with these loan sales. The Company has not experienced any losses as a result of these representations and warranties.

Loans, held for investment

The Company generally holds loans for investment and has the intent and ability to hold loans until their maturity. Therefore, they are reported at book value. Net loans are stated at the amount of unpaid principal, adjusted for net deferred fees and costs, purchase accounting fair value adjustments, and an allowance for credit losses. In addition, the book value of loans that are subject to a fair value hedge is adjusted for changes in value attributable to the effective portion of the hedged benchmark interest rate risk.

The Company may also acquire loans through a business combination. These acquired loans are recorded at estimated fair value on the date of purchase, which is comprised of unpaid principal adjusted for estimated credit losses and interest rate fair value adjustments. Loans are evaluated individually to determine if there has been credit deterioration since origination. Such loans may then be aggregated and accounted for as a pool of loans based on common characteristics. When the Company acquires such loans, the yield that may be accreted (accretable yield) is limited to the excess of the Company’s estimate of undiscounted cash flows expected to be collected over the Company’s initial investment in the loan. The excess of contractual cash flows over the cash flows expected to be collected may not be recognized as an adjustment to yield, loss, or a valuation allowance. Subsequent increases in cash flows expected to be collected generally are recognized prospectively through adjustment of the loan’s yield over the remaining life. Subsequent decreases to cash flows expected to be collected are recognized as impairment. The Company may not carry over or create a valuation allowance in the initial accounting for loans acquired under these circumstances. For purchased loans that are not deemed impaired, fair value adjustments attributable to both credit and interest rates are accreted (or amortized) over the contractual life of the individual loan. For additional information, see "Note 3. Loans, Leases and Allowance for Credit Losses" of these Notes to Unaudited Consolidated Financial Statements.

Loan fees collected for the origination of loans less direct loan origination costs (net deferred loan fees) are amortized over the contractual life of the loan through interest income. If the loan has scheduled payments, the amortization of the net deferred loan fee is calculated using the interest method over the contractual life of the loan. If the loan does not have scheduled payments, such as a line of credit, the net deferred loan fee is recognized as interest income on a straight-line basis over the contractual life of the loan commitment. Commitment fees based on a percentage of a customer’s unused line of credit and fees related to standby letters of credit are recognized over the commitment period. When loans are repaid, any remaining unamortized balances of premiums, discounts, or net deferred fees are recognized as interest income.

Non-accrual loans: For all loan types except credit cards, when a borrower discontinues making payments as contractually required by the note, the Company must determine whether it is appropriate to continue to accrue interest. The Company ceases accruing interest income when the loan has become delinquent by more than 90 days or when management determines that the full repayment of principal and collection of interest according to contractual terms is no longer likely. The Company may decide to continue to accrue interest on certain loans more than 90 days delinquent if the loans are well secured by collateral and in the process of collection. Credit card loans and other personal loans are typically charged off no later than 180 days delinquent.

For all loan types, when a loan is placed on non-accrual status, all interest accrued but uncollected is reversed against interest income in the period in which the status is changed and, the Company makes a loan-level decision to apply either the cash basis or cost recovery method. The Company recognizes income on a cash basis only for those non-accrual loans for which the collection of the remaining principal balance is not in doubt. Under the cost recovery method, subsequent payments received from the customer are applied to principal and generally no further interest income is recognized until the principal has been paid in full or until circumstances have changed such that payments are again consistently received as contractually required.

Impaired loans: A loan is identified as impaired when it is no longer probable that interest and principal will be collected according to the contractual terms of the original loan agreement. Generally, impaired loans are classified as non-accrual. However, in certain instances, impaired loans may continue on an accrual basis, if full repayment of all principal and interest is expected and the loan is both well secured and in the process of collection. Impaired loans are measured for reserve requirements in accordance with ASC 310, Receivables, based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral less applicable disposition costs if the loan is collateral dependent. The amount of an impairment reserve, if any, and any subsequent changes are recorded as a provision for credit losses. Losses are recorded as a charge-off when losses are confirmed. In addition to management's internal loan review process, regulators may from time to time direct the Company to modify loan grades, loan impairment calculations, or loan impairment methodology.

Troubled Debt Restructured Loans: A TDR loan is a loan on which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in the accrued interest, or deferral of interest payments. A TDR loan is also considered impaired. A TDR loan may be returned to accrual status when the loan is brought current, has performed in accordance with the contractual restructured terms for a reasonable period of time (generally six months) and the ultimate collectability of the total contractual restructured principal and interest is no longer in doubt. However, such loans continue to be considered impaired. Consistent with regulatory guidance, a TDR loan that is subsequently modified in another restructuring agreement but has shown sustained performance and classification as a TDR, will be removed from TDR status provided that the modified terms were market-based at the time of modification.

Allowance for credit losses

Credit risk is inherent in the business of extending loans and leases to borrowers, for which the Company must maintain an adequate allowance for credit losses. The allowance for credit losses is established through a provision for credit losses recorded to expense. Loans are charged against the allowance for credit losses when management believes that the contractual principal or interest will not be collected. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount believed adequate to absorb estimated probable losses on existing loans that may become uncollectable, based on evaluation of the collectability of loans and prior credit loss experience, together with other factors. The Company formally re-evaluates and establishes the appropriate level of the allowance for credit losses on a quarterly basis.

The allowance consists of specific and general components. The specific allowance applies to impaired loans. For impaired collateral dependent loans, the reserve is calculated based on the collateral value, net of estimated disposition costs. Generally, the Company obtains independent collateral valuation analysis for each loan every twelve months. Loans not collateral dependent are evaluated based on the expected future cash flows discounted at the original contractual interest rate.

The general allowance covers all non-impaired loans and is based on historical loss experience adjusted for various qualitative and quantitative factors listed below.

The Company’s allowance for credit loss methodology incorporates several quantitative and qualitative risk factors used to establish the appropriate allowance for credit losses at each reporting date. Quantitative factors include: 1) the Company's historical loss experience; 2) levels of and trends in delinquencies and impaired loans; 3) levels of and trends in charge-offs and recoveries; 4) trends in volume and terms of loans; 5) changes in underwriting standards or lending policies; 6) experience, ability, depth of lending staff; 7) national and local economic trends and conditions; 8) changes in credit concentrations; 9) out-of-market exposures; 10) changes in quality of loan review system; and 11) changes in the value of underlying collateral.

An internal ten-year loss history is also incorporated into the allowance calculation model. Due to the credit concentration of the Company's loan portfolio in real estate secured loans, the value of collateral is heavily dependent on real estate values in Nevada, Arizona, and California. While management uses the best information available to make its evaluation, future adjustments to the allowance may be necessary if there are significant changes in economic or other conditions. In addition, regulators, as an integral part of their examination processes, periodically review the Bank's allowance for credit losses, and may require the Bank to make additions to the allowance based on their judgment about information available to them at the time of their examination. Management regularly reviews the assumptions and formulae used in determining the allowance and makes adjustments if required to reflect the current risk profile of the portfolio.

Other assets acquired through foreclosure

Other assets acquired through foreclosure consist primarily of properties acquired as a result of, or in-lieu-of, foreclosure. Properties or other assets (primarily repossessed assets formerly leased) are classified as OREO and other repossessed property and are initially reported at fair value of the asset less estimated selling costs. Subsequent adjustments are based on the lower of carrying value or fair value less estimated costs to sell the property. Costs related to the development or improvement of the assets are capitalized and costs related to holding the assets are charged to non-interest expense. Property is evaluated regularly to ensure the recorded amount is supported by its current fair value and valuation allowances.

Goodwill and other intangible assets

The Company records as goodwill the excess of the purchase price over the fair value of the identifiable net assets acquired in accordance with applicable guidance. The Company performs its annual goodwill and intangibles impairment tests as of October 1 each year, or more often if events or circumstances indicate that the carrying value may not be recoverable. During the three and six months endedJune 30, 2016 and 2015, there were no events or circumstances that indicated that an interim impairment test of goodwill or other intangible assets was necessary.

Treasury Shares

Effective January 1, 2016, the Company has separately presented treasury shares, which represents shares surrendered to the Company equal in value to the statutory payroll tax withholding obligations arising from the vesting of employee restricted stock awards. Prior period amounts have been adjusted to reflect this new presentation, with no change in total stockholders' equity. The Company carries treasury shares at cost.

Derivative financial instruments

The Company uses interest-rate swaps to mitigate interest-rate risk associated with changes to 1) the fair value of certain fixed-rate financial instruments (fair value hedges) and 2) certain cash flows related to future interest payments on variable rate financial instruments (cash flow hedges).

The Company recognizes derivatives as assets or liabilities in the Consolidated Balance Sheet at their fair value in accordance with ASC 815, Derivatives and Hedging. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship. On the date the derivative contract is entered into, the Company designates the derivative as a fair value hedge or cash flow hedge. Derivative instruments designated in a hedge relationship to mitigate exposure to changes in the fair value of an asset or liability attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivative instruments designated in a hedge relationship to mitigate exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.

Changes in the fair value of a derivative that is designated and qualifies as a fair value hedge, along with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk are recorded in current-period earnings. For a cash flow hedge, the effective portion of the change in the fair value of the derivative is recorded in AOCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Any ineffective portion of the change in fair value of a cash flow hedge is recognized immediately in non-interest income in the Consolidated Income Statement. Under both the fair value and cash flow hedge scenarios, changes in the fair value of derivatives not considered to be highly effective in hedging the change in fair value or the expected cash flows of the hedged item are recognized in earnings as non-interest income during the period of the change.

The Company documents its hedge relationships, including identification of the hedging instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction at the time the derivative contract is executed. Both at inception and at least quarterly thereafter, the Company assesses whether the derivatives used in hedging transactions are highly effective (as defined in the guidance) in offsetting changes in either the fair value or cash flows of the hedged item. Retroactive effectiveness is assessed, as well as the continued expectation that the hedge will remain effective prospectively. The Company discontinues hedge accounting prospectively when it is determined that a hedge is no longer highly effective. When hedge accounting is discontinued on a fair value hedge that no longer qualifies as an effective hedge, the derivative continues to be reported at fair value in the Consolidated Balance Sheet, but the carrying amount of the hedged item is no longer adjusted for future changes in fair value. The adjustment to the carrying amount of the hedged item that existed at the date hedge accounting is discontinued is amortized over the remaining life of the hedged item into earnings.

Derivative instruments that are not designated as hedges, so called free-standing derivatives, are reported in the Consolidated Balance Sheet at fair value and the changes in fair value are recognized in earnings as non-interest income during the period of change.

The Company may in the normal course of business purchase a financial instrument or originate a loan that contains an embedded derivative instrument. Upon purchasing the instrument or originating the loan, the Company assesses whether the economic characteristics of the embedded derivative are clearly and closely related to the economic characteristics of the remaining component of the financial instrument (i.e., the host contract) and whether a separate instrument with the same terms as the embedded instrument would meet the definition of a derivative instrument. When it is determined that the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is separated from the host contract and carried at fair value. However, in cases where the host contract is measured at fair value, with changes in fair value reported in current earnings, or the Company is unable to reliably identify and measure an embedded derivative for separation from its host contract, the entire contract is carried in the Consolidated Balance Sheet at fair value and is not designated as a hedging instrument.

Income taxes

The Company is subject to income taxes in the United States and files a consolidated federal income tax return with all of its subsidiaries, with the exception of BW Real Estate, Inc. Deferred income taxes are recorded to reflect the effects of temporary differences between the financial reporting carrying amounts of assets and liabilities and their income tax bases using enacted tax rates that are expected to be in effect when the taxes are actually paid or recovered. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.

Net deferred tax assets are recorded to the extent that these assets will more-likely-than-not be realized. In making these determinations, all available positive and negative evidence is considered, including scheduled reversals of deferred tax liabilities, tax planning strategies, projected future taxable income, and recent operating results. If it is determined that deferred income tax assets to be realized in the future are in excess of their net recorded amount, an adjustment to the valuation allowance will be recorded, which will reduce the Company's provision for income taxes.

A tax benefit from an unrecognized tax benefit may be recognized when it is more-likely-than-not that the position will be sustained upon examination, including related appeals or litigation, based on technical merits. Income tax benefits must meet a more-likely-than-not recognition threshold at the effective date to be recognized.

Interest and penalties related to unrecognized tax benefits are recognized as part of the provision for income taxes in the Consolidated Income Statement. Accrued interest and penalties are included in the related tax liability line with other liabilities in the Consolidated Balance Sheet.

Off-balance sheet instruments

In the ordinary course of business, the Company has entered into off-balance sheet financial instrument arrangements consisting of commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the Consolidated Financial Statements when they are funded. They involve, to varying degrees, elements of credit risk in excess of amounts recognized in the Consolidated Balance Sheet. Losses would be experienced when the Company is contractually obligated to make a payment under these instruments and must seek repayment from the borrower, which may not be as financially sound in the current period as they were when the commitment was originally made. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral.

As with outstanding loans, the Company applies qualitative factors and utilization rates to its off-balance sheet obligations in determining an estimate of losses inherent in these contractual obligations. The estimate for credit losses on off-balance sheet instruments is included in other liabilities and the charge to income that establishes this liability is included in non-interest expense.

The Company also has off-balance sheet arrangements related to its derivative instruments. Derivative instruments are recognized in the Consolidated Financial Statements at fair value and their notional values are carried off-balance sheet. See "Note 9. Derivatives and Hedging Activities" of these Notes to Unaudited Consolidated Finance Statements for further discussion.

Fair values of financial instruments

The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities. ASC 820, Fair Value Measurement, establishes a framework for measuring fair value and a three-level valuation hierarchy for disclosure of fair value measurement as well as enhances disclosure requirements for fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The Company uses various valuation approaches, including market, income, and/or cost approaches. ASC 820 establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would consider in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the reliability of inputs, as follows:

• Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

• Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market.

• Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques.

The availability of observable inputs varies based on the nature of the specific financial instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety.

Fair value is a market-based measure considered from the perspective of a market participant who may purchase the asset or assume the liability rather than an entity-specific measure. When market assumptions are available, ASC 820 requires the Company to make assumptions regarding the assumptions that market participants would use to estimate the fair value of the financial instrument at the measurement date.

ASC 825, Financial Instruments, requires disclosure of fair value information about financial instruments, whether or not recognized in the balance sheet, for which it is practicable to estimate that value.

Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates presented herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction at June 30, 2016 and 2015. The estimated fair value amounts for June 30, 2016 and 2015 have been measured as of period-end, and have not been re-evaluated or updated for purposes of these Consolidated Financial Statements subsequent to those dates. As such, the estimated fair values of these financial instruments subsequent to the reporting date may be different than the amounts reported at period-end.

The information in "Note 13. Fair Value Accounting" in these Notes to Unaudited Consolidated Financial Statements should not be interpreted as an estimate of the fair value of the entire Company since a fair value calculation is only required for a limited portion of the Company’s assets and liabilities.

Due to the wide range of valuation techniques and the degree of subjectivity used in making the estimate, comparisons between the Company’s disclosures and those of other companies or banks may not be meaningful.

The following methods and assumptions were used by the Company in estimating the fair value of its financial instruments:

Cash and cash equivalents

The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks approximate their fair value.

Money market investments

The carrying amounts reported in the Consolidated Balance Sheets for money market investments approximate their fair value.

Investment securities

The fair values of CRA investments, mutual funds, and exchange-listed preferred stock are based on quoted market prices and are categorized as Level 1 in the fair value hierarchy.

The fair values of other investment securities were determined based on matrix pricing. Matrix pricing is a mathematical technique that utilizes observable market inputs including, for example, yield curves, credit ratings, and prepayment speeds. Fair values determined using matrix pricing are generally categorized as Level 2 in the fair value hierarchy.

The Company owns certain CDOs for which quoted prices are not available. Quoted prices for similar assets are also not available for these investment securities. In order to determine the fair value of these securities, the Company engages a third party to estimate the future cash flows and discount rate using third party quotes adjusted based on assumptions a market participant would assume necessary for each specific security. As a result of the lack of an active market, the resulting fair values have been categorized as Level 3 in the fair value hierarchy.

Restricted stock

WAB is a member of the Federal Reserve System and the FHLB and, accordingly, maintains investments in the capital stock of the FRB and the FHLB. WAB also maintains an investment in its primary correspondent bank. These investments are carried at cost since no ready market exists for them, and they have no quoted market value. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists. The fair values of these investments have been categorized as Level 2 in the fair value hierarchy.

Loans

The fair value of loans is estimated based on discounted cash flows using interest rates currently being offered for loans with similar terms to borrowers with similar credit quality and adjustments that the Company believes a market participant would consider in determining fair value based on a third party independent valuation. As a result, the fair value for certain loans is categorized as Level 2 in the fair value hierarchy, excluding impaired loans which are categorized as Level 3.

Accrued interest receivable and payable

The carrying amounts reported in the Consolidated Balance Sheets for accrued interest receivable and payable approximate their fair value.

Derivative financial instruments

All derivatives are recognized in the Consolidated Balance Sheets at their fair value. The fair value for derivatives is determined based on market prices, broker-dealer quotations on similar products, or other related input parameters. As a result, the fair values have been categorized as Level 2 in the fair value hierarchy.

Deposits

The fair value disclosed for demand and savings deposits is by definition equal to the amount payable on demand at their reporting date (that is, their carrying amount), which the Company believes a market participant would consider in determining fair value. The carrying amount for variable-rate deposit accounts approximates their fair value. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on these deposits. The fair value measurement of the deposit liabilities is categorized as Level 2 in the fair value hierarchy.

FHLB advances and other borrowed funds

The fair values of the Company’s borrowings are estimated using discounted cash flow analyses, based on the market rates for similar types of borrowing arrangements. The FHLB advances have been categorized as Level 2 in the fair value hierarchy due to their short durations. Other borrowings have been categorized as Level 3 in the fair value hierarchy.

Subordinated debt

The fair value of subordinated debt is based on the market rate for the respective subordinated debt security. Subordinated debt has been categorized as Level 3 in the fair value hierarchy.

Junior subordinated debt

Junior subordinated debt is valued based on a discounted cash flow model which uses as inputs Treasury Bond rates and the 'BB' rated financial index. Junior subordinated debt has been categorized as Level 3 in the fair value hierarchy.

Off-balance sheet instruments

The fair value of the Company’s off-balance sheet instruments (lending commitments and standby letters of credit) is based on quoted fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements, and the counterparties’ credit standing.

Recent accounting pronouncements

In June 2014, the FASB issued guidance within ASU 2014-12, Accounting for Share-Based Payments When the Terms of anAward Provide That a Performance Target Could Be Achieved after the Requisite Service Period. The amendments in ASU 2014-12 to Topic 718, Compensation - Stock Compensation, provide explicit guidance on whether to treat a performance target that could be achieved after the requisite service period as a performance condition that affects vesting or as a nonvesting condition that affects the grant-date fair value of an award. The amendments are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. An entity may elect to apply the amendments either prospectively to all awards granted or modified after the effective date or retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.

In August 2014, the FASB issued guidance within ASU 2014-15, Presentation of Financial Statements - Going Concern. The amendments in ASU 2014-15 to Subtopic 205-40, Going Concern, provide guidance about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern. The amendments require management to assess an entity's ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. The amendments are effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Early application is permitted. The adoption of this guidance is not expected to have a material impact on the Company’s Consolidated Financial Statements.

In February 2015, the FASB issued guidance within ASU 2015-02, Amendments to the Consolidation Analysis. The amendments in ASU 2015-02 to Topic 810, Consolidation, change the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. Specifically, the amendments modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminate the presumption that a general partner should consolidate a limited partnership, affect the consolidation analysis of reporting entities that are involved with variable interest entities, particularly those that have fee arrangements and related party relationships, and provide a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. The amendments are effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. An entity may apply the amendments in this Update using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption or, may apply the amendments retrospectively. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.

In November 2015, the FASB issued guidance within ASU 2015-17, Income Taxes. The amendments in ASU 2015-17 to Topic 740, Income Taxes, changes the presentation of deferred income tax liabilities and assets, from previously bifurcated current and noncurrent, to a single noncurrent amount on the classified statement of financial position. The amendment is effective from the annual period ending after December 15, 2016, and for and interim periods within those annual periods. Early application is permitted. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In January 2016, the FASB issued guidance within ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in ASU 2016-01 to Subtopic 825-10, Financial Instruments, contain the following elements: 1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; 2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; 4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 5) requires an entity to present separately in OCI the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; 6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or accompanying notes to the financial statements; 7) clarifies that the entity should evaluate the need for a valuation allowance on a deferred tax asset related to AFS securities in combination with the entity's other deferred tax assets. The amendments are effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. Except for the early application of the amendment noted in item 5) above (which the Company elected to early adopt effective January 1, 2015 as discussed in the Company's Annual Report on Form 10-K for the year ended December 31, 2015), early adoption of the amendments in this Update is not permitted. The adoption of the other amendments in this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In February 2016, the FASB issued guidance within ASU 2016-02, Leases. The amendments in ASU 2016-02 to Topic 842, Leases, require lessees to recognize the lease assets and lease liabilities arising from operating leases in the statement of financial position. The accounting applied by a lessor is largely unchanged from that applied under previous GAAP. The amendments in this Update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. Management is in the process of evaluating the effects that the standard is expected to have on the Company's Consolidated Financial Statements and related disclosures.

In March 2016, the FASB issued guidance within ASU 2016-05, Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships. The amendments in ASU 2016-05 to Topic 815, Derivatives and Hedging, clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. An entity has the option to apply the amendments in this Update on either a prospective basis or a modified retrospective basis. The amendments in this Update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In March 2016, the FASB issued guidance within ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. The amendments in ASU 2016-09 to Topic 718, Compensation - Stock Compensation, require recognition of all excess tax benefits and tax deficiencies through income tax expense or benefit in the income statement. Other amendments in this ASU include guidance on the classification of share-based payment transactions in the statement of cash flows and an option to account for forfeitures of share-based awards as they occur rather than estimating the compensation cost based on the number of awards that are expected to vest. The amendments in this Update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any interim or annual period. Effective January 1, 2016, the Company elected early adoption of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. As a result of adoption, the Company recognized a $3.9 million tax benefit as a reduction of income tax expense. The Company has elected to continue to estimate compensation cost based on the number of awards that are expected to vest. The adoption of this guidance did not have a significant impact on the Company's Consolidated Statement of Cash Flows.

In June 2016, the FASB issued guidance within ASU 2016-13, Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 to Topic 326, Financial Instruments - Credit Losses, require that an organization measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU also requires enhanced disclosures, including qualitative and quantitative disclosures that provide additional information about the amounts recorded in the financial statements. Additionally, the ASU amends the accounting for credit losses on AFS debt securities and purchased financial assets with credit deterioration. The amendments in this Update are effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Management is in the process of evaluating the effects that the standard is expected to have on the Company's Consolidated Financial Statements and related disclosures.

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Investment Securities

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Investment Securities

2. INVESTMENT SECURITIES

The carrying amounts and fair values of investment securities at June 30, 2016 and December 31, 2015 are summarized as follows: 

	June 30, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
	(in thousands)
Held-to-maturity
Tax-exempt bonds	$	36,929	$	4,233	$	—		$	41,162
Available-for-sale
Collateralized debt obligations	$	50	$	10,133	$	—		$	10,183
Commercial MBS issued by GSEs	43,432		1,066		—			44,498
Corporate debt securities	7,765		597		—			8,362
CRA investments	34,984		399		—			35,383
Municipal obligations	326,306		20,455		—			346,761
Preferred stock	104,581		5,563		(868		)	109,276
Private label commercial MBS	3,728		—		(7		)	3,721
Private label residential MBS	337,891		3,072		(1,608		)	339,355
Residential MBS issued by GSEs	1,184,185		23,603		(43		)	1,207,745
Trust preferred securities	32,000		—		(8,299		)	23,701
U.S. government sponsored agency securities	34,000		3		—			34,003
U.S. treasury securities	2,496		55		—			2,551
Total AFS securities	$	2,111,418	$	64,946	$	(10,825	)	$	2,165,539
Securities measured at fair value
Residential MBS issued by GSEs								$	1,326

	December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	50	$	10,059	$	(49	)	$	10,060
Commercial MBS issued by GSEs	19,147		72		(105		)	19,114
Corporate debt securities	12,769		482		—			13,251
CRA investments	34,722		—		(37		)	34,685
Municipal obligations	320,087		14,743		—			334,830
Preferred stock	108,417		4,286		(1,467		)	111,236
Private label commercial MBS	4,685		6		—			4,691
Private label residential MBS	261,530		5		(4,407		)	257,128
Residential MBS issued by GSEs	1,169,631		5,254		(4,664		)	1,170,221
Trust preferred securities	32,000		—		(7,686		)	24,314
U.S. treasury securities	2,996		—		(3		)	2,993
Total AFS securities	$	1,966,034	$	34,907	$	(18,418	)	$	1,982,523
Securities measured at fair value
Residential MBS issued by GSEs								$	1,481

For additional information on the fair value changes of securities measured at fair value, see the trading securities table in "Note 13. Fair Value Accounting" of these Notes to Unaudited Consolidated Financial Statements.

The Company conducts an OTTI analysis on a quarterly basis. The initial indication of OTTI for both debt and equity securities is a decline in the market value below the amount recorded for an investment, and taking into account the severity and duration of the decline. Another potential indication of OTTI is a downgrade below investment grade. In determining whether an impairment is OTTI, the Company considers the length of time and the extent to which the market value has been below cost, recent events specific to the issuer, including investment downgrades by rating agencies and economic conditions of its industry, and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery. For marketable equity securities, the Company also considers the issuer’s financial condition, capital strength, and near-term prospects.

For debt securities, for the purpose of an OTTI analysis, the Company also considers the cause of the price decline (general level of interest rates, credit spreads, and industry and issuer-specific factors), the issuer’s financial condition, near-term prospects, and current ability to make future payments in a timely manner, as well as the issuer’s ability to service debt, and any change in agencies’ ratings at the evaluation date from the acquisition date and any likely imminent action.

The Company has reviewed securities for which there is an unrealized loss in accordance with its accounting policy for OTTI described above and determined that there were no impairment charges for the three and six months endedJune 30, 2016 and 2015. The Company does not consider any securities to be other-than-temporarily impaired as of June 30, 2016 and December 31, 2015. No assurance can be made that OTTI will not occur in future periods.

Information pertaining to securities with gross unrealized losses at June 30, 2016 and December 31, 2015, aggregated by investment category and length of time that individual securities have been in a continuous loss position follows:

	June 30, 2016
	Less Than Twelve Months				More Than Twelve Months				Total
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale
Preferred stock	$	182	$	10,729	$	686	$	8,680	$	868	$	19,409
Private label commercial MBS	7		3,721		—		—		7		3,721
Private label residential MBS	965		99,654		643		30,653		1,608		130,307
Residential MBS issued by GSEs	15		21,009		28		14,334		43		35,343
Trust preferred securities	—		—		8,299		23,701		8,299		23,701
Total AFS securities	$	1,169	$	135,113	$	9,656	$	77,368	$	10,825	$	212,481

	December 31, 2015
	Less Than Twelve Months				More Than Twelve Months				Total
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	49	$	1	$	—	$	—	$	49	$	1
Commercial MBS issued by GSEs	105		17,051		—		—		105		17,051
CRA investments	37		24,729		—		—		37		24,729
Preferred stock	377		10,542		1,090		14,761		1,467		25,303
Private label residential MBS	3,733		226,720		674		30,372		4,407		257,092
Residential MBS issued by GSEs	3,566		536,515		1,098		38,338		4,664		574,853
Trust preferred securities	—		—		7,686		24,314		7,686		24,314
U.S. treasury securities	3		2,006		—		—		3		2,006
Total AFS securities	$	7,870	$	817,564	$	10,548	$	107,785	$	18,418	$	925,349

At June 30, 2016 and December 31, 2015, the Company’s unrealized losses relate primarily to interest rate fluctuations, credit spread widening, and reduced liquidity in applicable markets. The total number of securities in an unrealized loss position at June 30, 2016 was 59, compared to 146 at December 31, 2015. In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and industry analysis reports. Since material downgrades have not occurred and management does not intend to sell the debt securities in an unrealized loss position in the foreseeable future, none of the securities described in the above table or in this paragraph were deemed to be OTTI.

The preferred stock and trust preferred securities have yields based on floating rate LIBOR, which are highly correlated to the federal funds rate and have been negatively affected by the low rate environment. This has resulted in unrealized losses for these securities.

The table below shows the amortized cost and fair value of securities as of June 30, 2016, by contractual maturities. MBS are shown separately as individual MBS are comprised of pools of loans with varying maturities. Therefore, these securities are listed separately in the maturity summary. 

	June 30, 2016
	Amortized Cost		Estimated Fair Value
	(in thousands)
Held-to-maturity
After five years through ten years	$	15,445	$	17,187
After ten years	21,484		23,975
Total HTM securities	$	36,929	$	41,162
Available-for-sale
Due in one year or less	$	55,422	$	56,134
After one year through five years	73,571		77,406
After five years through ten years	89,966		93,725
After ten years	323,223		342,955
Mortgage-backed securities	1,569,236		1,595,319
Total AFS securities	$	2,111,418	$	2,165,539

The following tables summarize the carrying amount of the Company’s investment ratings position as of June 30, 2016 and December 31, 2015: 

	June 30, 2016
	AAA		Split-rated AAA/AA+		AA+ to AA-		A+ to A-		BBB+ to BBB-		BB+ and below		Unrated		Totals
	(in thousands)
Held-to-maturity
Tax-exempt bonds	$	15,445	$	—	$	—	$	—	$	—	$	—	$	21,484	$	36,929
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	—	$	—	$	—	$	10,183	$	—	$	10,183
Commercial MBS issued by GSEs	—		27,050		—		—		—		—		17,448		44,498
Corporate debt securities	—		—		2,701		5,661		—		—		—		8,362
CRA investments	—		—		—		—		—		—		35,383		35,383
Municipal obligations	7,853		—		200,699		131,929		6,109		170		1		346,761
Preferred stock	—		—		—		—		71,814		19,330		18,132		109,276
Private label commercial MBS	3,721		—		—		—		—		—		—		3,721
Private label residential MBS	275,956		—		34,733		2,625		1,243		2,858		21,940		339,355
Residential MBS issued by GSEs	—		1,207,745		—		—		—		—		—		1,207,745
Trust preferred securities	—		—		—		—		23,701		—		—		23,701
U.S. government sponsored agency securities	—		34,003		—		—		—		—		—		34,003
U.S. treasury securities	—		2,551		—		—		—		—		—		2,551
Total AFS securities (1)	$	287,530	$	1,271,349	$	238,133	$	140,215	$	102,867	$	32,541	$	92,904	$	2,165,539
Securities measured at fair value
Residential MBS issued by GSEs	$	—	$	1,326	$	—	$	—	$	—	$	—	$	—	$	1,326

(1) Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch.

	December 31, 2015
	AAA		Split-rated AAA/AA+		AA+ to AA-		A+ to A-		BBB+ to BBB-		BB+ and below		Unrated		Totals
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	—	$	—	$	—	$	10,060	$	—	$	10,060
Commercial MBS issued by GSEs	—		19,114		—		—		—		—		—		19,114
Corporate debt securities	—		—		2,721		5,489		5,041		—		—		13,251
CRA investments	—		—		—		—		—		—		34,685		34,685
Municipal obligations	7,949		—		180,460		131,110		6,243		180		8,888		334,830
Preferred stock	—		—		—		—		79,955		23,655		7,626		111,236
Private label commercial MBS	4,691		—		—		—		—		—		—		4,691
Private label residential MBS	235,605		—		40		3,186		1,750		2,705		13,842		257,128
Residential MBS issued by GSEs	—		1,170,221		—		—		—		—		—		1,170,221
Trust preferred securities	—		—		—		—		24,314		—		—		24,314
U.S. treasury securities	—		2,993		—		—		—		—		—		2,993
Total AFS securities (1)	$	248,245	$	1,192,328	$	183,221	$	139,785	$	117,303	$	36,600	$	65,041	$	1,982,523
Securities measured at fair value
Residential MBS issued by GSEs	$	—	$	1,481	$	—	$	—	$	—	$	—	$	—	$	1,481

(1) Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch.

Securities with carrying amounts of approximately $833.9 million and $830.7 million at June 30, 2016 and December 31, 2015, respectively, were pledged for various purposes as required or permitted by law.

The following table presents gross gains and losses on sales of investment securities: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016			2015
Gross gains	$	—	$	55	$	2,057		$	1,103
Gross losses	—		—		(1,056		)	(459		)
Net gains on sales of investment securities	$	—	$	55	$	1,001		$	644

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Loans, Leases and Allowance for Credit Losses

6 Months Ended

Jun. 30, 2016

Receivables [Abstract]

Loans, Leases and Allowance for Credit Losses

3. LOANS, LEASES AND ALLOWANCE FOR CREDIT LOSSES

The composition of the Company’s held for investment loan portfolio is as follows: 

	June 30, 2016			December 31, 2015
	(in thousands)
Commercial and industrial	$	5,454,939		$	5,114,257
Commercial real estate - non-owner occupied	3,601,331			2,283,536
Commercial real estate - owner occupied	2,008,261			2,083,285
Construction and land development	1,333,537			1,133,439
Residential real estate	293,020			322,939
Commercial leases	122,668			148,493
Consumer	41,755			26,905
Loans, net of deferred loan fees and costs	12,855,511			11,112,854
Allowance for credit losses	(122,104		)	(119,068		)
Total loans HFI	$	12,733,407		$	10,993,786

Net deferred loan fees and costs as of June 30, 2016 and December 31, 2015 total $19.8 million and $19.2 million, respectively, which is a reduction in the carrying value of loans. Net unamortized discounts on loans total $7.5 million and $8.2 million as of June 30, 2016 and December 31, 2015, respectively. Total loans held for investment are also net of interest rate and credit marks on acquired loans totaling $84.7 million and $40.5 million as of June 30, 2016 and December 31, 2015, respectively, which is a reduction in the carrying value of acquired loans.

As of June 30, 2016 and December 31, 2015, the Company also had $22.3 million and $23.8 million of HFS loans, respectively.

The following table presents the contractual aging of the recorded investment in past due loans held for investment by class of loans:

	June 30, 2016
	Current		30-59 Days Past Due		60-89 Days Past Due		Over 90 days Past Due		Total Past Due		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,002,907	$	130	$	—	$	5,224	$	5,354	$	2,008,261
Non-owner occupied	3,408,792		1,610		—		—		1,610		3,410,402
Multi-family	190,929		—		—		—		—		190,929
Commercial and industrial
Commercial	5,441,453		150		1,598		11,738		13,486		5,454,939
Leases	122,560		70		38		—		108		122,668
Construction and land development
Construction	850,558		—		—		—		—		850,558
Land	481,695		—		—		1,284		1,284		482,979
Residential real estate	288,640		205		641		3,534		4,380		293,020
Consumer	41,573		4		15		163		182		41,755
Total loans	$	12,829,107	$	2,169	$	2,292	$	21,943	$	26,404	$	12,855,511

	December 31, 2015
	Current		30-59 Days Past Due		60-89 Days Past Due		Over 90 days Past Due		Total Past Due		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,078,968	$	445	$	362	$	3,510	$	4,317	$	2,083,285
Non-owner occupied	2,099,274		2,481		—		2,822		5,303		2,104,577
Multi-family	178,959		—		—		—		—		178,959
Commercial and industrial
Commercial	5,066,197		26,358		14,124		7,578		48,060		5,114,257
Leases	145,905		—		—		2,588		2,588		148,493
Construction and land development
Construction	694,527		—		—		—		—		694,527
Land	438,495		—		—		417		417		438,912
Residential real estate	317,677		888		159		4,215		5,262		322,939
Consumer	26,587		12		91		215		318		26,905
Total loans	$	11,046,589	$	30,184	$	14,736	$	21,345	$	66,265	$	11,112,854

The following table presents the recorded investment in non-accrual loans and loans past due ninety days or more and still accruing interest by class of loans: 

	June 30, 2016								December 31, 2015
	Non-accrual loans						Loans past due 90 days or more and still accruing		Non-accrual loans						Loans past due 90 days or more and still accruing
	Current		Past Due/ Delinquent		Total Non-accrual				Current		Past Due/ Delinquent		Total Non-accrual
	(in thousands)
Commercial real estate
Owner occupied	$	1,069	$	1,698	$	2,767	$	3,526	$	749	$	3,253	$	4,002	$	339
Non-owner occupied	8,129		—		8,129		—		11,851		2,822		14,673		—
Multi-family	—		—		—		—		—		—		—		—
Commercial and industrial
Commercial	13,032		9,380		22,412		3,461		3,263		15,026		18,289		2,671
Leases	—		—		—		—		—		2,588		2,588		—
Construction and land development
Construction	—		—		—		—		—		—		—		—
Land	—		1,284		1,284		—		1,892		417		2,309		—
Residential real estate	1,400		3,534		4,934		4		1,835		4,489		6,324		—
Consumer	—		159		159		—		—		196		196		18
Total	$	23,630	$	16,055	$	39,685	$	6,991	$	19,590	$	28,791	$	48,381	$	3,028

The reduction in interest income associated with loans on non-accrual status was approximately $0.5 million and $0.7 million for three months endedJune 30, 2016 and 2015, respectively, and $0.9 million and $1.4 million for the six months endedJune 30, 2016 and 2015, respectively.

The Company utilizes an internal asset classification system as a means of reporting problem and potential problem loans. Under the Company’s risk rating system, the Company classifies problem and potential problem loans as Special Mention, Substandard, Doubtful, and Loss. Substandard loans include those characterized by well-defined weaknesses and carry the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loans classified as Doubtful, or risk rated eight, have all the weaknesses inherent in those classified as Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The final rating of Loss covers loans considered uncollectible and having such little recoverable value that it is not practical to defer writing off the asset. Loans that do not currently expose the Company to sufficient risk to warrant classification in one of the aforementioned categories, but possess weaknesses that warrant management’s close attention, are deemed to be Special Mention. Risk ratings are updated, at a minimum, quarterly.

The following tables present HFI loans by risk rating: 

	June 30, 2016
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Commercial real estate
Owner occupied	$	1,965,474	$	28,077	$	12,787	$	1,923	$	—	$	2,008,261
Non-owner occupied	3,316,897		44,045		49,460		—		—		3,410,402
Multi-family	190,929		—		—		—		—		190,929
Commercial and industrial
Commercial	5,330,572		72,170		52,197		—		—		5,454,939
Leases	122,136		201		331		—		—		122,668
Construction and land development
Construction	825,983		8,420		16,155		—		—		850,558
Land	469,291		499		13,189		—		—		482,979
Residential real estate	282,079		349		10,592		—		—		293,020
Consumer	41,392		62		301		—		—		41,755
Total	$	12,544,753	$	153,823	$	155,012	$	1,923	$	—	$	12,855,511

	June 30, 2016
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Current (up to 29 days past due)	$	12,542,844	$	150,510	$	133,830	$	1,923	$	—	$	12,829,107
Past due 30 - 59 days	1,894		129		146		—		—		2,169
Past due 60 - 89 days	—		229		2,063		—		—		2,292
Past due 90 days or more	15		2,955		18,973		—		—		21,943
Total	$	12,544,753	$	153,823	$	155,012	$	1,923	$	—	$	12,855,511

	December 31, 2015
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,032,932	$	28,422	$	20,814	$	1,117	$	—	$	2,083,285
Non-owner occupied	2,054,428		14,867		35,282		—		—		2,104,577
Multi-family	178,959		—		—		—		—		178,959
Commercial and industrial
Commercial	4,962,930		76,283		74,294		750		—		5,114,257
Leases	140,531		4,580		794		2,588		—		148,493
Construction and land development
Construction	678,438		16,089		—		—		—		694,527
Land	420,819		362		17,731		—		—		438,912
Residential real estate	310,067		776		12,096		—		—		322,939
Consumer	26,438		209		258		—		—		26,905
Total	$	10,805,542	$	141,588	$	161,269	$	4,455	$	—	$	11,112,854

	December 31, 2015
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Current (up to 29 days past due)	$	10,799,558	$	140,932	$	104,232	$	1,867	$	—	$	11,046,589
Past due 30 - 59 days	1,907		271		28,006		—		—		30,184
Past due 60 - 89 days	4,077		385		10,274		—		—		14,736
Past due 90 days or more	—		—		18,757		2,588		—		21,345
Total	$	10,805,542	$	141,588	$	161,269	$	4,455	$	—	$	11,112,854

The table below reflects the recorded investment in loans classified as impaired: 

	June 30, 2016			December 31, 2015
	(in thousands)
Impaired loans with a specific valuation allowance under ASC 310 (1)	$	20,695		$	24,287
Impaired loans without a specific valuation allowance under ASC 310 (2)	95,771			104,587
Total impaired loans	$	116,466		$	128,874
Valuation allowance related to impaired loans (3)	$	(6,395	)	$	(4,658	)

(1) Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

(2) Includes TDR loans of $68.6 million and $85.9 million at June 30, 2016 and December 31, 2015, respectively.

(3) Includes valuation allowance related to TDR loans of $0.2 million and $0.3 million at June 30, 2016 and December 31, 2015, respectively.

The following table presents impaired loans by class: 

	June 30, 2016		December 31, 2015
	(in thousands)
Commercial real estate
Owner occupied	$	18,142	$	23,153
Non-owner occupied	32,485		41,081
Multi-family	—		—
Commercial and industrial
Commercial	32,042		26,513
Leases	332		2,896
Construction and land development
Construction	4		—
Land	17,531		18,322
Residential real estate	15,667		16,575
Consumer	263		334
Total	$	116,466	$	128,874

A valuation allowance is established for an impaired loan when the fair value of the loan is less than the recorded investment. In certain cases, portions of impaired loans are charged-off to realizable value instead of establishing a valuation allowance and are included, when applicable, in the table above as “Impaired loans without a specific valuation allowance under ASC 310.” However, before concluding that an impaired loan needs no associated valuation allowance, an assessment is made to consider all available and relevant information for the method used to evaluate impairment and the type of loan being assessed. The valuation allowance disclosed above is included in the allowance for credit losses reported in the Consolidated Balance Sheets as of June 30, 2016 and December 31, 2015.

The following table presents the average investment in impaired loans and income recognized on impaired loans: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Average balance on impaired loans	$	109,833	$	155,943	$	116,173	$	159,186
Interest income recognized on impaired loans, accrual basis	1,050		1,126		2,163		2,310
Interest recognized on non-accrual loans, cash basis	225		548		397		1,201

The following table presents average investment in impaired loans by loan class: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Commercial real estate
Owner occupied	$	19,075	$	38,750	$	20,406	$	40,839
Non-owner occupied	31,894		59,873		32,463		62,636
Multi-family	—		—		—		—
Commercial and industrial
Commercial	24,299		12,401		28,001		12,835
Leases	333		4,879		1,191		2,618
Construction and land development
Construction	—		—		—		—
Land	18,299		19,834		18,099		20,523
Residential real estate	15,635		19,838		15,700		19,375
Consumer	298		368		313		360
Total	$	109,833	$	155,943	$	116,173	$	159,186

The average investment in TDR loans included in the average investment in impaired loans table above for the three months endedJune 30, 2016 and 2015 was $72.1 million and $121.2 million, respectively, and $75.1 million and $123.6 million for the six months endedJune 30, 2016 and 2015, respectively.

The following table presents interest income on impaired loans by class: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Commercial real estate
Owner occupied	$	247	$	406	$	542	$	827
Non-owner occupied	313		360		651		690
Multi-family	—		—		—		—
Commercial and industrial
Commercial	121		60		229		139
Leases	4		—		36		—
Construction and land development
Construction	—		—		—		—
Land	239		197		446		392
Residential real estate	125		102		256		259
Consumer	1		1		3		3
Total	$	1,050	$	1,126	$	2,163	$	2,310

The Company is not committed to lend significant additional funds on these impaired loans.

The following table summarizes nonperforming assets: 

	June 30, 2016		December 31, 2015
	(in thousands)
Non-accrual loans (1)	$	39,685	$	48,381
Loans past due 90 days or more on accrual status (2)	6,991		3,028
Accruing troubled debt restructured loans	65,008		70,707
Total nonperforming loans	111,684		122,116
Other assets acquired through foreclosure, net	49,842		43,942
Total nonperforming assets	$	161,526	$	166,058

(1) Includes non-accrual TDR loans of $4.2 million and $18.2 million at June 30, 2016 and December 31, 2015, respectively.

(2) Includes $1.7 million from loans acquired with deteriorated credit quality at June 30, 2016.

Loans Acquired in GE Asset Purchase

The following table presents information regarding the contractually required principal payments receivable, cash flows expected to be collected, and the preliminary estimated fair value of loans acquired in the GE asset purchase as of April 20, 2016, the closing date of the transaction. See Note 15. Mergers and Acquisitions of these Notes to Unaudited Consolidated Financial Statements for additional details related to the purchase.

	April 20, 2016
	Commercial Real Estate		Construction and Land Development		Total
	(in thousands)
Contractually required principal and interest payments:
PCI	$	143,734	$	16,088	$	159,822
Non-PCI	1,579,064		103,914		1,682,978
Total loans acquired	$	1,722,798	$	120,002	$	1,842,800
Cash flows expected to be collected:
PCI	$	107,865	$	11,754	$	119,619
Non-PCI	1,315,523		80,955		1,396,478
Total loans acquired	$	1,423,388	$	92,709	$	1,516,097
Fair value of loans acquired:
PCI	$	85,329	$	7,938	$	93,267
Non-PCI	1,122,419		65,311		1,187,730
Total loans acquired	$	1,207,748	$	73,249	$	1,280,997

Loans Acquired with Deteriorated Credit Quality

Changes in the accretable yield for loans acquired with deteriorated credit quality are as follows: 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Balance, at beginning of period	$	13,541		$	17,956		$	15,925		$	19,156
Additions due to acquisition	4,301			857			4,301			857
Reclassifications from non-accretable to accretable yield (1)	—			265			—			695
Accretion to interest income	(887		)	(1,012		)	(1,669		)	(2,090		)
Reversal of fair value adjustments upon disposition of loans	(1,092		)	(876		)	(2,694		)	(1,428		)
Balance, at end of period	$	15,863		$	17,190		$	15,863		$	17,190

(1) The primary drivers of reclassification from non-accretable to accretable yield resulted from changes in estimated cash flows.

Allowance for Credit Losses

The following table summarizes the changes in the allowance for credit losses by portfolio type: 

	Three Months Ended June 30,
	Construction and Land Development			Commercial Real Estate			Residential Real Estate			Commercial and Industrial			Consumer			Total
	(in thousands)
2016
Beginning Balance	$	19,425		$	23,104		$	4,938		$	71,156		$	604		$	119,227
Charge-offs	—			244			—			1,161			46			1,451
Recoveries	(58		)	(770		)	(153		)	(804		)	(43		)	(1,828		)
Provision	1,903			1,237			(545		)	(252		)	157			2,500
Ending balance	$	21,386		$	24,867		$	4,546		$	70,547		$	758		$	122,104
2015
Beginning Balance	$	17,999		$	28,111		$	6,666		$	58,651		$	671		$	112,098
Charge-offs	—			—			218			1,771			53			2,042
Recoveries	(1,373		)	(1,738		)	(1,184		)	(681		)	(24		)	(5,000		)
Provision	165			(903		)	(1,233		)	2,028			(57		)	—
Ending balance	$	19,537		$	28,946		$	6,399		$	59,589		$	585		$	115,056

	Six Months Ended June 30,
	Construction and Land Development			Commercial Real Estate			Residential Real Estate			Commercial and Industrial			Consumer			Total
	(in thousands)
2016
Beginning Balance	$	18,976		$	23,160		$	5,278		$	71,181		$	473		$	119,068
Charge-offs	—			654			26			8,652			120			9,452
Recoveries	(153		)	(4,435		)	(410		)	(2,380		)	(110		)	(7,488		)
Provision	2,257			(2,074		)	(1,116		)	5,638			295			5,000
Ending balance	$	21,386		$	24,867		$	4,546		$	70,547		$	758		$	122,104
2015
Beginning Balance	$	18,558		$	28,783		$	7,456		$	54,566		$	853		$	110,216
Charge-offs	—			—			618			2,164			107			2,889
Recoveries	(1,530		)	(2,121		)	(1,717		)	(1,597		)	(64		)	(7,029		)
Provision	(551		)	(1,958		)	(2,156		)	5,590			(225		)	700
Ending balance	$	19,537		$	28,946		$	6,399		$	59,589		$	585		$	115,056

The following table presents impairment method information related to loans and allowance for credit losses by loan portfolio segment: 

	Commercial Real Estate-Owner Occupied		Commercial Real Estate-Non-Owner Occupied		Commercial and Industrial		Residential Real Estate		Construction and Land Development		Commercial Leases		Consumer		Total Loans
	(in thousands)
Loans as of June 30, 2016:
Recorded Investment:
Impaired loans with an allowance recorded	$	777	$	5,331	$	13,857	$	711	$	—	$	—	$	19	$	20,695
Impaired loans with no allowance recorded	17,365		27,154		18,185		14,956		17,535		332		244		95,771
Total loans individually evaluated for impairment	18,142		32,485		32,042		15,667		17,535		332		263		116,466
Loans collectively evaluated for impairment	1,976,526		3,439,886		5,421,189		274,548		1,297,386		122,336		41,492		12,573,363
Loans acquired with deteriorated credit quality	13,593		128,960		1,708		2,805		18,616		—		—		165,682
Total recorded investment	$	2,008,261	$	3,601,331	$	5,454,939	$	293,020	$	1,333,537	$	122,668	$	41,755	$	12,855,511
Unpaid Principal Balance
Impaired loans with an allowance recorded	$	777	$	5,331	$	14,109	$	766	$	—	$	—	$	19	$	21,002
Impaired loans with no allowance recorded	60,891		53,045		89,584		42,458		84,600		484		3,968		335,030
Total loans individually evaluated for impairment	61,668		58,376		103,693		43,224		84,600		484		3,987		356,032
Loans collectively evaluated for impairment	1,976,526		3,439,886		5,421,189		274,548		1,297,386		122,336		41,492		12,573,363
Loans acquired with deteriorated credit quality	17,878		163,683		8,834		3,326		20,055		—		—		213,776
Total unpaid principal balance	$	2,056,072	$	3,661,945	$	5,533,716	$	321,098	$	1,402,041	$	122,820	$	45,479	$	13,143,171
Related Allowance for Credit Losses
Impaired loans with an allowance recorded	$	777	$	430	$	5,060	$	127	$	—	$	—	$	1	$	6,395
Impaired loans with no allowance recorded	—		—		—		—		—		—		—		—
Total loans individually evaluated for impairment	777		430		5,060		127		—		—		1		6,395
Loans collectively evaluated for impairment	11,225		12,387		63,885		4,419		21,386		1,260		757		115,319
Loans acquired with deteriorated credit quality	—		48		342		—		—		—		—		390
Total allowance for credit losses	$	12,002	$	12,865	$	69,287	$	4,546	$	21,386	$	1,260	$	758	$	122,104

	Commercial Real Estate-Owner Occupied		Commercial Real Estate-Non-Owner Occupied		Commercial and Industrial		Residential Real Estate		Construction and Land Development		Commercial Leases		Consumer		Total Loans
	(in thousands)
Loans as of December 31, 2015:
Recorded Investment:
Impaired loans with an allowance recorded	$	2,778	$	2,344	$	18,230	$	914	$	—	$	—	$	21	$	24,287
Impaired loans with no allowance recorded	20,375		38,737		8,283		15,661		18,322		2,896		313		104,587
Total loans individually evaluated for impairment	23,153		41,081		26,513		16,575		18,322		2,896		334		128,874
Loans collectively evaluated for impairment	2,044,934		2,180,250		5,085,299		303,372		1,115,117		145,597		26,571		10,901,140
Loans acquired with deteriorated credit quality	15,198		62,205		2,445		2,992		—		—		—		82,840
Total recorded investment	$	2,083,285	$	2,283,536	$	5,114,257	$	322,939	$	1,133,439	$	148,493	$	26,905	$	11,112,854
Unpaid Principal Balance
Impaired loans with an allowance recorded	$	2,778	$	2,344	$	19,233	$	969	$	—	$	—	$	21	$	25,345
Impaired loans with no allowance recorded	63,709		61,692		71,773		44,142		82,800		5,229		3,923		333,268
Total loans individually evaluated for impairment	66,487		64,036		91,006		45,111		82,800		5,229		3,944		358,613
Loans collectively evaluated for impairment	2,044,934		2,180,250		5,085,299		303,372		1,115,117		145,597		26,571		10,901,140
Loans acquired with deteriorated credit quality	20,227		88,181		7,820		3,536		—		—		—		119,764
Total unpaid principal balance	$	2,131,648	$	2,332,467	$	5,184,125	$	352,019	$	1,197,917	$	150,826	$	30,515	$	11,379,517
Related Allowance for Credit Losses
Impaired loans with an allowance recorded	$	858	$	11	$	3,518	$	270	$	—	$	—	$	1	$	4,658
Impaired loans with no allowance recorded	—		—		—		—		—		—		—		—
Total loans individually evaluated for impairment	858		11		3,518		270		—		—		1		4,658
Loans collectively evaluated for impairment	10,953		11,302		65,806		5,008		18,976		1,857		472		114,374
Loans acquired with deteriorated credit quality	—		36		—		—		—		—		—		36
Total allowance for credit losses	$	11,811	$	11,349	$	69,324	$	5,278	$	18,976	$	1,857	$	473	$	119,068

Troubled Debt Restructurings

A TDR loan is a loan on which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in the accrued interest, or deferral of interest payments. The majority of the Company's modifications are extensions in terms or deferral of payments which result in no lost principal or interest followed by reductions in interest rates or accrued interest. A TDR loan is also considered impaired. Consistent with regulatory guidance, a TDR loan that is subsequently modified in another restructuring agreement but has shown sustained performance and classification as a TDR, will be removed from TDR status provided that the modified terms were market-based at the time of modification.

The Company did not have any new TDR loans during the three and six months endedJune 30, 2016. The following table presents information on the financial effects of TDR loans by class for the three and six months endedJune 30, 2015:

	Three and Six Months Ended June 30, 2015
	Number of Loans	Pre-Modification Outstanding Recorded Investment		Forgiven Principal Balance		Lost Interest Income		Post-Modification Outstanding Recorded Investment		Waived Fees and Other Expenses
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	$	—	$	—	$	—	$	—
Non-owner occupied	—	—		—		—		—		—
Multi-family	—	—		—		—		—		—
Commercial and industrial
Commercial	1	256		—		—		256		—
Leases	—	—		—		—		—		—
Construction and land development
Construction	—	—		—		—		—		—
Land	—	—		—		—		—		—
Residential real estate	—	—		—		—		—		—
Consumer	—	—		—		—		—		—
Total	1	$	256	$	—	$	—	$	256	$	—

The following table presents TDR loans by class for which there was a payment default during the period: 

	Three Months Ended June 30,
	2016			2015
	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	—	$	—
Non-owner occupied	—	—		—	—
Multi-family	—	—		—	—
Commercial and industrial
Commercial	—	—		—	—
Leases	—	—		—	—
Construction and land development
Construction	—	—		—	—
Land	—	—		—	—
Residential real estate	1	333		1	202
Consumer	—	—		—	—
Total	1	$	333	1	$	202

	Six Months Ended June 30,
	2016			2015
	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	—	$	—
Non-owner occupied	1	5,381		—	—
Multi-family	—	—		—	—
Commercial and industrial
Commercial	—	—		—	—
Leases	—	—		—	—
Construction and land development
Construction	—	—		1	137
Land	—	—		—	—
Residential real estate	1	333		1	202
Consumer	—	—		—	—
Total	2	$	5,714	2	$	339

A TDR loan is deemed to have a payment default when it becomes past due 90 days, goes on non-accrual, or is restructured again. Payment defaults, along with other qualitative indicators, are considered by management in the determination of the allowance for credit losses.

At June 30, 2016, there were no loan commitments outstanding on TDR loans. At December 31, 2015, there was $0.1 million in loan commitments outstanding on TDR loans.

Loan Purchases and Sales

For the three months endedJune 30, 2016 and 2015, secondary market loan purchases totaled $64.6 million and $7.7 million, respectively. For the three months endedJune 30, 2016, these purchased loans consisted primarily of commercial and industrial loans and for the same period in 2015, these purchased loans consisted of $2.0 million of commercial and industrial loans and $5.7 million of commercial real estate loans. For the six months endedJune 30, 2016 and 2015, secondary market loan purchases totaled $98.3 million and $26.1 million, respectively. For the six months endedJune 30, 2016, these purchased loans consisted primarily of commercial and industrial loans and for the same period in 2015, these purchased loans consisted of $13.0 million of commercial and industrial loans, $11.7 million of commercial real restate loans, and $1.4 million of commercial leases.

During the six months endedJune 30, 2016, the Company sold loans, which consisted primarily of commercial real estate and commercial and industrial loans, with a carrying value of $23.8 million and recognized a gain of $2.5 million on the sales. During the six months endedJune 30, 2015, the Company sold loans, which primarily consisted of commercial and industrial loans, with a carrying value of $56.3 million and recognized a gain of $0.3 million.

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Other Assets Acquired Through Foreclosure

6 Months Ended

Jun. 30, 2016

Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]

Other Assets Acquired Through Foreclosure

4. OTHER ASSETS ACQUIRED THROUGH FORECLOSURE

The following table represents the changes in other assets acquired through foreclosure: 

	Three Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	61,346		$	(8,570	)	$	52,776
Transfers to other assets acquired through foreclosure, net	88			—			88
Proceeds from sale of other real estate owned and repossessed assets, net	(4,480		)	1,813			(2,667		)
Valuation adjustments, net	—			134			134
Gains, net (1)	(489		)	—			(489		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	77,968		$	(14,209	)	$	63,759
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	5,739			—			5,739
Proceeds from sale of other real estate owned and repossessed assets, net	(15,415		)	2,480			(12,935		)
Valuation adjustments, net	—			(718		)	(718		)
Gains, net (1)	1,940			—			1,940
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(1) There were no net gains related to initial transfers to other assets during each of the three months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

	Six Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	52,984		$	(9,042	)	$	43,942
Transfers to other assets acquired through foreclosure, net	10,726			—			10,726
Proceeds from sale of other real estate owned and repossessed assets, net	(6,916		)	2,108			(4,808		)
Valuation adjustments, net	—			311			311
Gains, net (2)	(329		)	—			(329		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	71,421		$	(14,271	)	$	57,150
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	13,459			—			13,459
Proceeds from sale of other real estate owned and repossessed assets, net	(17,703		)	3,328			(14,375		)
Valuation adjustments, net	—			(1,504		)	(1,504		)
Gains, net (2)	3,055			—			3,055
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(2) Includes net gains related to initial transfers to other assets of zero and $0.6 million during the six months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

At June 30, 2016, and 2015, the majority of the Company’s repossessed assets consisted of properties located in Nevada. The Company held 34 properties at June 30, 2016, compared to 39 at December 31, 2015, and 56 at June 30, 2015.

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Other Borrowings

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Other Borrowings

5. OTHER BORROWINGS

The following table summarizes the Company’s borrowings as of June 30, 2016 and December 31, 2015: 

	June 30, 2016		December 31, 2015
	(in thousands)
Short-Term:
Federal funds purchased	$	—	$	—
FHLB advances	—		150,000
Total short-term borrowings	$	—	$	150,000

The Company maintains other lines of credit with correspondent banks totaling $170.0 million, of which $25.0 million is secured by pledged securities and has a floating interest rate of one-month or three-month LIBOR plus 1.50%. The remaining $145.0 million is unsecured. As of June 30, 2016 and December 31, 2015, there were no outstanding balances on these lines of credit.

The Company maintains lines of credit with the FHLB and the FRB. The Company’s borrowing capacity is determined based on collateral pledged, generally consisting of investment securities and loans, at the time of the borrowing. At June 30, 2016, there were no short-term FHLB advances. At December 31, 2015, short-term FHLB advances of $150.0 million had a weighted average interest rate of 0.36%.

As of June 30, 2016 and December 31, 2015, the Company had additional available credit with the FHLB of approximately $1.55 billion and $1.54 billion, respectively, and with the FRB of approximately $1.08 billion and $1.21 billion, respectively.

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Qualifying Debt

6 Months Ended

Jun. 30, 2016

Qualifying Debt Disclosure [Abstract]

Qualifying Debt

6. QUALIFYING DEBT

Subordinated Debt

On June 16, 2016, the Company issued $175.0 million of subordinated debentures with a maturity date of July 1, 2056. Beginning on or after July 1, 2021, the Company may redeem the debentures, in whole or in part, at their principal amount plus any accrued and unpaid interest. The subordinated debt was recorded net of issuance costs of $5.5 million. The debentures have an interest rate of 6.25% per annum. To hedge the interest rate risk, WAL entered into a fair value interest rate hedge with a pay variable/receive fixed swap. The carrying value of all subordinated debt, which includes the effective portion of related hedges, totals $325.8 million at June 30, 2016.

Junior Subordinated Debt

The Company has formed or acquired through acquisitions eight statutory business trusts, which exist for the exclusive purpose of issuing Cumulative Trust Preferred Securities.

With the exception of debt issued by Bridge Capital Trust I and Bridge Capital Trust II, junior subordinated debt is recorded at fair value at each reporting date due to the FVO election made by the Company under ASC 825. The Company did not make the FVO election for the Bridge junior subordinated debt. Accordingly, the carrying value of these trusts does not reflect the current fair value of the debt and includes a fair market value adjustment established at acquisition that is being accreted over the remaining life of the trusts. The carrying value of junior subordinated debt was $56.3 million and $58.4 million at June 30, 2016 and December 31, 2015, respectively.

The weighted average interest rate of all junior subordinated debt as of June 30, 2016 was 2.99%, which is three-month LIBOR plus the contractual spread of 2.34%, compared to a weighted average interest rate of 2.95% at December 31, 2015.

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Stockholders' Equity

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Note [Abstract]

Stockholder's Equity

7. STOCKHOLDERS' EQUITY

Common Stock Issuance

Under ATM Distribution Agreement

On June 4, 2014, the Company entered into a distribution agency agreement with Credit Suisse Securities (USA) LLC, under which the Company could sell shares of its common stock up to an aggregate offering price of $100.0 million on the New York Stock Exchange. The parties executed an Amended and Restated Distribution Agency Agreement on October 30, 2014. The Company pays Credit Suisse Securities (USA) LLC a mutually agreed rate, not to exceed 2% of the gross offering proceeds of the shares. The common stock will be sold at prevailing market prices at the time of the sale or at negotiated prices and, as a result, prices will vary.

Sales in the ATM offering were previously being made pursuant to a prospectus dated May 14, 2012 and a prospectus supplement filed with the SEC on June 4, 2014, in connection with one or more offerings of shares from the Company's shelf registration statement on Form S-3 (No. 333-181128), which expired on May 14, 2015. On May 7, 2015, the Company filed with the SEC a new shelf registration statement on Form S-3 (No. 333-203959). During the three and six months endedJune 30, 2016, the Company sold 1.6 million shares under the ATM offering at a weighted-average selling price of $36.63 per share for gross proceeds of $56.8 million. Total offering costs under the ATM offering for the three and six months endedJune 30, 2016, were $1.0 million, of which $0.9 million relates to compensation costs paid to Credit Suisse Securities. As the Company completed $100.0 million in aggregate sales under the ATM offering, the Company's ATM offering has expired and the Amended and Restated Distribution Agency Agreement has terminated. During the three and six months endedJune 30, 2015, there were no sales under the ATM offering.

Stock-Based Compensation

Restricted Stock Awards

For the three and six months endedJune 30, 2016, there were 38,845 and 352,510 shares of restricted stock awards granted to employees that generally vest over a three-year period. For the six months endedJune 30, 2016, a total of 63,000 shares of restricted stock were granted to non-employee WAL directors that were fully vested at June 30, 2016. The Company estimates the compensation cost for stock grants based upon the grant date fair value. Stock compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. The aggregate grant date fair value for the restricted stock awards granted during the three and six months endedJune 30, 2016 was $1.5 million and $13.3 million, respectively. For three and six months endedJune 30, 2016, the Company recognized $3.7 million and $7.5 million in stock-based compensation expense related to all restricted stock award grants, including those assumed as part of the Bridge acquisition, compared to $2.6 million and $5.1 million for the three and six months endedJune 30, 2015, respectively.

In addition, the Company granted 54,329 shares of restricted stock to certain members of executive management that have both performance and service conditions that affect vesting. The performance condition was based on achieving an EPS target for fiscal year 2016 and, if this target is met, the restricted stock will vest over a three-year service period. The grant date fair value of the awards was $1.7 million. For the three and six months endedJune 30, 2016, the Company recognized $0.1 million and $0.3 million, respectively, in stock-based compensation expense related to these performance-based restricted stock grants, compared to $0.1 million and $0.2 million for the three and six months endedJune 30, 2015, respectively.

Performance Stock Units

The Company grants members of its executive management committee performance stock units that do not vest unless the Company achieves a specified cumulative EPS target over a three-year performance period. The number of shares issued will vary based on the cumulative EPS target that is achieved. The Company estimates the cost of performance stock units based upon the grant date fair value and expected vesting percentage over the three-year performance period. For the three and six months endedJune 30, 2016, the Company recognized $1.2 million and $2.3 million, respectively, in stock-based compensation expense related to these performance stock units, compared to $1.0 million and $2.0 million for the three and six months endedJune 30, 2015, respectively.

The three-year performance period for the 2013 grant ended on December 31, 2015, and the Company's cumulative EPS for the performance period exceeded the level required for a maximum award under the terms of the grant. As a result on February 17, 2016, executive management committee members were granted 308,400 of fully vested common shares.

As of June 30, 2016, outstanding performance stock unit grants made in 2014 and 2015 are expected to pay out at the maximum award amount, which is equivalent to 409,800 common shares with a grant date fair value of $10.4 million. In January 2016, performance stock units were granted to executive management committee members with cumulative target awards equivalent to 109,704 shares of common stock. Assuming a 100% vesting percentage for the 2016 performance stock units, the grant date fair value of the awards was $3.4 million.

Stock Options

The Company's stock option awards consist of those awards assumed as part of the Bridge acquisition. During the three and six months endedJune 30, 2016, the Company recognized $0.2 million and $0.4 million, respectively, in compensation expense related to these awards. There were no stock option awards granted by the Company during the three and six months endedJune 30, 2016 and 2015.

Treasury Shares

Treasury shares represent shares surrendered to the Company equal in value to the statutory payroll tax withholding obligations arising from the vesting of employee restricted stock awards. During the three and six months endedJune 30, 2016, the Company purchased treasury shares of 2,735 and 293,167, respectively, at a weighted average price of $35.20 and $31.09 per share, respectively. During the three and six months endedJune 30, 2015, the Company purchased treasury shares of 1,888 and 254,781, respectively, at a weighted average price of $31.11 and $27.27 per share, respectively.

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Accumulated Other Comprehensive Income

6 Months Ended

Jun. 30, 2016

Equity [Abstract]

Accumulated Other Comprehensive Income

8. ACCUMULATED OTHER COMPREHENSIVE INCOME

The following table summarizes the changes in accumulated other comprehensive income by component, net of tax, for the periods indicated: 

	Three Months Ended June 30,
	Unrealized holding gains (losses) on AFS			Unrealized holding gains (losses) on SERP		Unrealized holding gains (losses) on junior subordinated debt			Impairment loss on securities		Total
	(in thousands)
Balance, March 31, 2016	$	20,301		$	96	$	12,792		$	144	$	33,333
Other comprehensive income (loss) before reclassifications	12,712			6		575			—		13,293
Amounts reclassified from accumulated other comprehensive income	—			—		—			—		—
Net current-period other comprehensive income (loss)	12,712			6		575			—		13,293
Balance, June 30, 2016	$	33,013		$	102	$	13,367		$	144	$	46,626
Balance, March 31, 2015	$	23,279		$	—	$	16,115		$	144	$	39,538
SERP assumed in Bridge acquisition	—			337		—			—		337
Other comprehensive (loss) income before reclassifications	(8,378		)	—		(4,756		)	—		(13,134		)
Amounts reclassified from accumulated other comprehensive income	(34		)	—		—			—		(34		)
Net current-period other comprehensive (loss) income	(8,412		)	337		(4,756		)	—		(12,831		)
Balance, June 30, 2015	$	14,867		$	337	$	11,359		$	144	$	26,707

	Six Months Ended June 30,
	Unrealized holding gains (losses) on AFS			Unrealized holding gains (losses) on SERP		Unrealized holding gains (losses) on junior subordinated debt			Impairment loss on securities		Total
	(in thousands)
Balance, December 31, 2015	$	9,993		$	90	$	12,033		$	144	$	22,260
Other comprehensive income (loss) before reclassifications	23,731			12		1,334			—		25,077
Amounts reclassified from accumulated other comprehensive income	(711		)	—		—			—		(711		)
Net current-period other comprehensive income (loss)	23,020			12		1,334			—		24,366
Balance, June 30, 2016	$	33,013		$	102	$	13,367		$	144	$	46,626
Balance, January 1, 2015	$	16,495		$	—	$	16,309		$	144	$	32,948
SERP assumed in Bridge acquisition	—			337		—			—		337
Other comprehensive (loss) income before reclassifications	(1,225		)	—		(4,950		)	—		(6,175		)
Amounts reclassified from accumulated other comprehensive income	(403		)	—		—			—		(403		)
Net current-period other comprehensive (loss) income	(1,628		)	337		(4,950		)	—		(6,241		)
Balance, June 30, 2015	$	14,867		$	337	$	11,359		$	144	$	26,707

The following table presents reclassifications out of accumulated other comprehensive income: 

	Three Months Ended June 30,					Six Months Ended June 30,
Income Statement Classification	2016		2015			2016			2015
	(in thousands)
Gain (loss) on sales of investment securities, net	$	—	$	55		$	1,001		$	644
Income tax (expense) benefit	—		(21		)	(290		)	(241		)
Net of tax	$	—	$	34		$	711		$	403

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Derivative and Hedging Activities

6 Months Ended

Jun. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative and Hedging Activities

9. DERIVATIVES AND HEDGING ACTIVITIES

The Company is a party to various derivative instruments. Derivative instruments are contracts between two or more parties that have a notional amount and an underlying variable, require a small or no initial investment, and allow for the net settlement of positions. A derivative’s notional amount serves as the basis for the payment provision of the contract and takes the form of units, such as shares or dollars. A derivative’s underlying variable is a specified interest rate, security price, commodity price, foreign exchange rate, index, or other variable. The interaction between the notional amount and the underlying variable determines the number of units to be exchanged between the parties and influences the fair value of the derivative contract.

The primary type of derivatives that the Company uses are interest rate swaps. Generally, these instruments are used to help manage the Company's exposure to interest rate risk and meet client financing and hedging needs.

Derivatives are recorded at fair value in the Consolidated Balance Sheets, after taking into account the effects of bilateral collateral and master netting agreements. These agreements allow the Company to settle all derivative contracts held with the same counterparty on a net basis, and to offset net derivative positions with related cash collateral, where applicable.

As of June 30, 2016, December 31, 2015, and June 30, 2015, the Company does not have any significant outstanding cash flow hedges or free-standing derivatives.

Derivatives Designated in Hedge Relationships

The Company utilizes derivatives that have been designated as part of a hedge relationship in accordance with the applicable accounting guidance to minimize the exposure to changes in benchmark interest rates and volatility of net interest income and EVE to interest rate fluctuations. The primary derivative instruments used to manage interest rate risk are interest rate swaps, which convert the contractual interest rate index of agreed-upon amounts of assets and liabilities (i.e., notional amounts) to another interest rate index.

The Company has entered into pay fixed/receive variable interest rate swaps designated as fair value hedges of certain fixed rate loans. As a result, the Company receives variable-rate interest payments in exchange for making fixed-rate payments over the lives of the contracts without exchanging the notional amounts.

The Company has also entered into pay variable/receive fixed interest rate swaps, designated as fair value hedges on its fixed rate subordinated debt offerings. As a result, the Company is paying a floating rate of three month LIBOR plus 3.16% and is receiving semi-annual fixed payments of 5.00% to match the payments on the $150.0 million subordinated debt. For the fair value hedge on the Company's subordinated debentures issued on June 16, 2016, the Company is paying a floating rate of three month LIBOR plus 3.25% and is receiving quarterly fixed payments of 6.25% to match the payments on the debt.

Fair Values, Volume of Activity, and Gain/Loss Information Related to Derivative Instruments

The following table summarizes the fair values of the Company's derivative instruments on a gross and net basis as of June 30, 2016, December 31, 2015, and June 30, 2015. The change in the notional amounts of these derivatives from December 31, 2015 to June 30, 2016 indicates the volume of the Company's derivative transaction activity during these periods. The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements. Total derivative assets and liabilities are adjusted to take into account the impact of legally enforceable master netting agreements that allow the Company to settle all derivative contracts with the same counterparty on a net basis and to offset the net derivative position with the related collateral. Where master netting agreements are not in effect or are not enforceable under bankruptcy laws, the Company does not adjust those derivative amounts with counterparties. The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in other assets or other liabilities in the Consolidated Balance Sheets, as indicated in the following table:

	June 30, 2016						December 31, 2015						June 30, 2015
			Fair Value						Fair Value						Fair Value
	Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities
	(in thousands)
Derivatives designated as hedging instruments:
Fair value hedges
Interest rate swaps	$	970,382	$	7,757	$	107,097	$	800,478	$	3,569	$	64,785	$	828,036	$	198	$	49,037
Total	970,382		7,757		107,097		800,478		3,569		64,785		828,036		198		49,037
Netting adjustments (1)	—		—		—		—		—		—		—		—		—
Net derivatives in the balance sheet	$	970,382	$	7,757	$	107,097	$	800,478	$	3,569	$	64,785	$	828,036	$	198	$	49,037

(1) Netting adjustments represent the amounts recorded to convert derivative balances from a gross basis to a net basis in accordance with the applicable accounting guidance.

Fair value hedges

An assessment of effectiveness is performed at initiation of a hedge and on a quarterly basis thereafter. All of the Company's fair value hedges remained “highly effective” as of June 30, 2016, December 31, 2015, and June 30, 2015.

The following table summarizes the gains (losses) on fair value hedges for the three and six months endedJune 30, 2016 and 2015, all of which are recorded in other non-interest income.

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Hedge of Fixed Rate Loans (1)
Loss on "pay fixed" swap	$	(18,115	)	$	24,003		$	(42,312	)	$	8,773
Gain on receive fixed rate loans	18,122			(23,988		)	42,319			(8,752		)
Net ineffectiveness	$	7		$	15		$	7		$	21
Hedge of Fixed Rate Subordinated Debt Issuances (1)
Gain on "receive fixed" swap	$	3,024		$	198		$	4,189		$	198
Loss on subordinated debt	(3,024		)	(198		)	(4,189		)	(198		)
Net ineffectiveness	$	—		$	—		$	—		$	—

(1) The fair value of derivatives contracts are carried as other assets and other liabilities in the Consolidated Balance Sheets. The effective portion of hedging gains (losses) is recorded as basis adjustments to the underlying hedged asset or liability. Gains and losses on both the hedging derivative and hedged item are recorded through non-interest income with a resulting net income impact for the amount of ineffectiveness.

Counterparty Credit Risk

Like other financial instruments, derivatives contain an element of credit risk. This risk is measured as the expected positive replacement value of the contracts. Management generally enters into bilateral collateral and master netting agreements that provide for the net settlement of all contracts with the same counterparty. Additionally, management monitors counterparty credit risk exposure on each contract to determine appropriate limits on the Company's total credit exposure across all product types. In general, the Company has a zero credit threshold with regard to derivative exposure with counterparties. Management reviews the Company's collateral positions on a daily basis and exchanges collateral with counterparties in accordance with standard ISDA documentation and other related agreements. The Company generally posts collateral in the form of highly rated securities issued by the U.S. Treasury or government-sponsored enterprises, such as GNMA, FNMA, and FHLMC. The total collateral posted by the Company for derivatives in a net liability position totaled $107.1 million at June 30, 2016, $61.7 million at December 31, 2015, and $46.7 million at June 30, 2015.

The following table summarizes the Company's largest exposure to an individual counterparty at the dates indicated for derivatives in net asset positions:

	June 30, 2016		December 31, 2015		June 30, 2015
	(in thousands)
Largest gross exposure (derivative asset) to an individual counterparty	$	7,556	$	3,569	$	198
Collateral posted by this counterparty	7,680		4,680		—
Derivative liability with this counterparty	—		—		—
Collateral pledged to this counterparty	—		1,340		—
Net exposure after netting adjustments and collateral	$	—	$	229	$	198

Credit Risk Contingent Features

Management has entered into certain derivative contracts that require the Company to post collateral to the counterparties when these contracts are in a net liability position. Conversely, the counterparties may post collateral when these contracts are in a net asset position. The amount of collateral to be posted is based on the amount of the net liability and exposure thresholds. As of June 30, 2016, December 31, 2015, and June 30, 2015 the aggregate fair value of all derivative contracts with credit risk contingent features (i.e., those containing collateral posting provisions) held by the Company that were in a net liability position totaled $107.1 million, $64.8 million, and $49.0 million, respectively. As of June 30, 2016, the Company was in an over-collateralized net position of $28.7 million after considering $135.8 million of collateral held in the form of securities. As of December 31, 2015 and June 30, 2015, the Company was in an over-collateralized position of $15.5 million and $18.0 million, respectively.

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Earnings per Share (Notes)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Share

10. EARNINGS PER SHARE

Diluted EPS is based on the weighted average outstanding common shares during each period, including common stock equivalents. Basic EPS is based on the weighted average outstanding common shares during the period.

The following table presents the calculation of basic and diluted EPS: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands, except per share amounts)
Weighted average shares - basic	102,688		88,177		102,294		88,059
Dilutive effect of stock awards	784		505		713		508
Weighted average shares - diluted	103,472		88,682		103,007		88,567
Net income available to common stockholders	$	61,614	$	39,228	$	122,946	$	79,435
Earnings per share - basic	0.60		0.44		1.20		0.90
Earnings per share - diluted	0.60		0.44		1.19		0.90

The Company had no anti-dilutive stock options outstanding at each of the periods ended June 30, 2016 and 2015.

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Income Taxes

6 Months Ended

Jun. 30, 2016

Income Tax Disclosure [Abstract]

Income Taxes

11. INCOME TAXES

The effective tax rate was 29.94% and 25.59% for the three months endedJune 30, 2016 and 2015, respectively. For the six months endedJune 30, 2016 and 2015, the Company's effective tax rate was 27.16% and 25.83%, respectively. The increase in the effective tax rate for the six months endedJune 30, 2016 is due primarily to an increase in projected pre-tax book income without corresponding tax deductible items.

Deferred tax assets and liabilities are included in the Consolidated Financial Statements at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be reversed. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.

For the six months endedJune 30, 2016, the net deferred tax assets decreased$21.1 million to $65.3 million. This overall decrease in the net deferred tax asset was primarily the result of decreases to deferred tax assets from a change in fair market value of junior subordinated debt and AFS securities, expected use of AMT credit carryovers, vesting of stock-based compensation awards, and fair market value adjustments related to acquired loans.

Although realization is not assured, the Company believes that the realization of the recognized deferred tax asset of $65.3 million at June 30, 2016 is more-likely-than-not based on expectations as to future taxable income and based on available tax planning strategies within the meaning of ASC 740, Income Taxes, that could be implemented if necessary to prevent a carryover from expiring.

At each of the periods ended June 30, 2016 and December 31, 2015, the Company had no deferred tax valuation allowance.

The deferred tax asset related to federal and state NOL carryovers outstanding at June 30, 2016 and December 31, 2015 available to reduce the tax liability in future years totaled $9.2 million and $9.3 million, respectively. The respective $9.2 million and $9.3 million of tax benefits relate entirely to federal NOL carryovers (subject to an annual limitation imposed by IRC Section 382). The Company’s ability to use federal NOL carryovers, as well as its ability to use certain future tax deductions called NUBILs associated with the Company's acquisitions is subject to annual limitations. In management’s opinion, it is more-likely-than-not that the results of future operations will generate sufficient taxable income to realize all of the deferred tax benefits related to these NOL carryovers and NUBILs.

At each of the periods ended June 30, 2016 and December 31, 2015, the total amount of unrecognized tax benefits, net of associated deferred tax benefit, that would impact the effective tax rate, if recognized, was $0.7 million.

Interest and penalties related to unrecognized tax benefits are recognized as part of the provision for income taxes. During each of the three and six months endedJune 30, 2016 and 2015, the Company recognized no amounts for penalties associated with unrecognized tax benefits and no amounts for interest.

At each of the periods ended June 30, 2016 and December 31, 2015, the Company has accrued a $0.1 million liability for penalties and a $0.1 million liability for interest.

Investments in LIHTC

The Company invests in LIHTC funds that are designed to generate a return primarily through the realization of federal tax credits.

Investments in LIHTC and unfunded LIHTC obligations are included as part of other assets and other liabilities, respectively, in the Consolidated Balance Sheets and total $171.5 million and $70.4 million, respectively, as of June 30, 2016, compared to $152.7 million and $61.2 million as of December 31, 2015. For the three months endedJune 30, 2016 and 2015, $3.8 million and $2.2 million of amortization related to LIHTC investments was recognized as a component of income tax expense, respectively. For the six months endedJune 30, 2016 and 2015, $8.2 million and $5.6 million of amortization related to LIHTC investments was recognized as a component of income tax expense, respectively.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

12. COMMITMENTS AND CONTINGENCIES

Unfunded Commitments and Letters of Credit

The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. They involve, to varying degrees, elements of credit risk in excess of amounts recognized in the Consolidated Balance Sheets.

Lines of credit are obligations to lend money to a borrower. Credit risk arises when the borrower's current financial condition may indicate less ability to pay than when the commitment was originally made. In the case of standby letters of credit, the risk arises from the potential failure of the customer to perform according to the terms of a contract. In such a situation, the third party might draw on the standby letter of credit to pay for completion of the contract and the Company would look to its customer to repay these funds with interest. To minimize the risk, the Company uses the same credit policies in making commitments and conditional obligations as it would for a loan to that customer.

Standby letters of credit and financial guarantees are commitments issued by the Company to guarantee the performance of a customer to a third party in borrowing arrangements. The Company generally has recourse to recover from the customer any amounts paid under the guarantees. Typically, letters of credit issued have expiration dates within one year.

A summary of the contractual amounts for unfunded commitments and letters of credit are as follows: 

	June 30, 2016		December 31, 2015
	(in thousands)
Commitments to extend credit, including unsecured loan commitments of $353,644 at June 30, 2016 and $341,374 at December 31, 2015	$	3,895,885	$	3,624,578
Credit card commitments and financial guarantees	54,270		57,966
Standby letters of credit, including unsecured letters of credit of $10,380 at June 30, 2016 and $4,257 at December 31, 2015	53,448		50,659
Total	$	4,003,603	$	3,733,203

Commitments to extend credit are agreements to lend to a customer provided that there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral.

The Company has exposure to credit losses from unfunded commitments and letters of credit. As funds have not been disbursed on these commitments, they are not reported as loans outstanding. Credit losses related to these commitments are not included in the allowance for credit losses reported in "Note 3. Loans, Leases and Allowance for Credit Losses" of these Consolidated Financial Statements and are accounted for as a separate loss contingency. This loss contingency for unfunded loan commitments and letters of credit was $10.8 million(including $7.0 million related to loans acquired in the GE asset purchase)and $3.3 million as of June 30, 2016 and December 31, 2015, respectively. Changes to this liability are adjusted through non-interest expense.

Concentrations of Lending Activities

The Company’s lending activities are driven in large part by the customers served in the market areas where the Company has branch offices in the states of Arizona, Nevada, and California. Despite the geographic concentration of lending activities, the Company does not have a single external customer from which it derives 10% or more of its revenues. The Company monitors concentrations within four broad categories: geography, industry, product, and collateral. The Company's loan portfolio includes significant credit exposure to the CRE market. As of the periods ended June 30, 2016 and December 31, 2015, CRE related loans accounted for approximately 54% and 49% of total loans, respectively. Substantially all of these loans are secured by first liens with an initial loan to value ratio of generally not more than 75%. Approximately 36% and 48% of these CRE loans, excluding construction and land loans, were owner-occupied at June 30, 2016 and December 31, 2015, respectively.

Contingencies

The Company is involved in various lawsuits of a routine nature that are being handled and defended in the ordinary course of the Company’s business. Expenses are being incurred in connection with these lawsuits, but in the opinion of management, based in part on consultation with outside legal counsel, the resolution of these lawsuits and associated defense costs will not have a material impact on the Company’s financial position, results of operations, or cash flows.

Lease Commitments

The Company leases the majority of its office locations and many of these leases contain multiple renewal options and provisions for increased rents. Total rent expense of $2.8 million and $1.6 million for three months endedJune 30, 2016 and 2015, respectively, was included in occupancy expense. For the six months endedJune 30, 2016 and 2015, total rent expense was $5.3 million and $3.2 million, respectively.

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Fair Value Accounting

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value Accounting

13. FAIR VALUE ACCOUNTING

The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC 825 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under ASC 825 are described in "Note 1. Summary of Significant Accounting Policies" of these Notes to Unaudited Consolidated Financial Statements.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Furthermore, the reported fair value amounts have not been comprehensively revalued since the presentation dates, and therefore, estimates of fair value after the balance sheet date may differ significantly from the amounts presented herein. A more detailed description of the valuation methodologies used for assets and liabilities measured at fair value is set forth below. Transfers between levels in the fair value hierarchy are recognized as of the end of the month following the event or change in circumstances that caused the transfer.

Under ASC 825, the Company elected the FVO treatment for certain junior subordinated debt issuances. This election is irrevocable and results in the recognition of unrealized gains and losses on these items in earnings at each reporting date.

All securities for which the fair value measurement option had been elected are included in a separate line item in the Consolidated Balance Sheets as securities measured at fair value.

For the three and six months endedJune 30, 2016 and 2015 gains and losses from fair value changes were as follows:

	Changes in Fair Values for Items Measured at Fair Value Pursuant to Election of the Fair Value Option
	Unrealized Gain/(Loss) on Assets and Liabilities Measured at Fair Value, Net			Interest Income on Securities		Interest Expense on Junior Subordinated Debt		Total Changes Included in Current-Period Earnings			Total Changes Included in OCI, Net of Tax
	(in thousands)
Three Months Ended June 30, 2016
Securities measured at fair value	$	(1	)	$	—	$	—	$	(1	)	$	—
Junior subordinated debt	1,006			—		693		693			575
Total	$	1,005		$	—	$	693	$	692		$	575
Six Months Ended June 30, 2016
Securities measured at fair value	$	(6	)	$	—	$	—	$	(6	)	$	—
Junior subordinated debt	2,218			—		1,373		1,373			1,334
Total	$	2,212		$	—	$	1,373	$	1,367		$	1,334
Three Months Ended June 30, 2015
Securities measured at fair value	$	(9	)	$	1	$	—	$	(8	)	$	—
Junior subordinated debt	(7,736		)	—		451		451			(4,756		)
Total	$	(7,745	)	$	1	$	451	$	443		$	(4,756	)
Six Months Ended June 30, 2015
Securities measured at fair value	$	(14	)	$	1	$	—	$	(13	)	$	—
Junior subordinated debt	(8,045		)	—		892		892			(4,950		)
Total	$	(8,059	)	$	1	$	892	$	879		$	(4,950	)

There were no net gains or losses recognized during the three and six months endedJune 30, 2016 and 2015 on trading securities sold during the period.

Interest income on securities measured at fair value is accounted for similarly to those classified as AFS. Any premiums or discounts are recognized in interest income over the term of the securities. For MBS, estimates of prepayments are considered in the constant yield calculations. Interest expense on junior subordinated debt is also determined under a constant yield calculation.

Fair value on a recurring basis

Financial assets and financial liabilities measured at fair value on a recurring basis include the following:

Securities measured at fair value: All of the Company’s securities measured at fair value, which consist of MBS, are reported at fair value utilizing Level 2 inputs in the same manner as described below for AFS securities.

AFS securities: CRA investments, preferred stock, and U.S. treasury securities are reported at fair value utilizing Level 1 inputs. With the exception of CDO securities, other securities classified as AFS are reported at fair value utilizing Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information, and the bond’s terms and conditions, among other things. The Company estimates the fair value of CDO securities utilizing Level 3 inputs, which include pricing indications from comparable securities.

Independent pricing service: The Company's independent pricing service provides pricing information on Level 1, 2, and 3 securities, and represents the pricing source for the majority of the portfolio. Management independently evaluates the fair value measurements received from the Company's third party pricing service through multiple review steps. First, management reviews what has transpired in the marketplace with respect to interest rates, credit spreads, volatility, and mortgage rates, among other things, and develops an expectation of changes to the securities' valuations from the previous quarter. Then, management obtains market values from additional sources. The pricing service provides management with observable market data including interest rate curves and mortgage prepayment speed grids, as well as dealer quote sheets, new bond offering sheets, and historical trade documentation. Management reviews the assumptions and decides whether they are reasonable. Management may compare interest rates, credit spreads, and prepayments speeds used as part of the assumptions to those that management believes are reasonable. Management may price securities using the provided assumptions to determine whether they can develop similar prices on like securities. Any discrepancies between management’s review and the prices provided by the vendor are discussed with the vendor and the Company’s other valuation advisors. Lastly, management selects a sample of investment securities and compares the values provided by its primary third party pricing service to the market values obtained from secondary sources and evaluates those with notable variances.

Annually, the Company receives an SSAE 16 report from its independent pricing service attesting to the controls placed on the operations of the service from its auditor.

Interest rate swaps: Interest rate swaps are reported at fair value utilizing Level 2 inputs. The Company obtains dealer quotations to value its interest rate swaps.

Junior subordinated debt: The Company estimates the fair value of its junior subordinated debt using a discounted cash flow model which incorporates the effect of the Company’s own credit risk in the fair value of the liabilities (Level 3). The Company’s cash flow assumptions are based on contractual cash flows as the Company anticipates that it will pay the debt according to its contractual terms.

As of June 30, 2016, the Company estimated the discount rate at 6.16%, which represents an implied credit spread of 5.51% plus three-month LIBOR (0.65%). As of December 31, 2015, the Company estimated the discount rate at 5.67%, which was a 5.06% credit spread plus three-month LIBOR (0.61%).

The fair value of assets and liabilities measured at fair value on a recurring basis was determined using the following inputs as of the periods presented: 

	Fair Value Measurements at the End of the Reporting Period Using:
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(in thousands)
June 30, 2016
Assets:
Measured at fair value
Residential MBS issued by GSEs	$	—	$	1,326	$	—	$	1,326
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	10,183	$	10,183
Commercial MBS issued by GSEs	—		44,498		—		44,498
Corporate debt securities	—		8,362		—		8,362
CRA investments	35,383		—		—		35,383
Municipal obligations	—		346,761		—		346,761
Preferred stock	109,276		—		—		109,276
Private label commercial MBS	—		3,721		—		3,721
Private label residential MBS	—		339,355		—		339,355
Residential MBS issued by GSEs	—		1,207,745		—		1,207,745
Trust preferred securities	—		23,701		—		23,701
U.S. government sponsored agency securities	—		34,003		—		34,003
U.S. treasury securities	2,551		—		—		2,551
Total AFS securities	$	147,210	$	2,008,146	$	10,183	$	2,165,539
Loans - HFS	$	—	$	22,336	$	—	$	22,336
Derivative assets (1)	—		7,757		—		7,757
Liabilities:
Junior subordinated debt (2)	$	—	$	—	$	44,710	$	44,710
Derivative liabilities (1)	—		107,097		—		107,097

(1) Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a net positive value of $106,503 and the net carrying value of subordinated debt includes a net negative value of $7,757 as of June 30, 2016, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

(2) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

	Fair Value Measurements at the End of the Reporting Period Using:
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(in thousands)
December 31, 2015
Assets:
Measured at fair value
Residential MBS issued by GSEs	$	—	$	1,481	$	—	$	1,481
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	10,060	$	10,060
Commercial MBS issued by GSEs	—		19,114		—		19,114
Corporate debt securities	—		13,251		—		13,251
CRA investments	34,685		—		—		34,685
Municipal obligations	—		334,830		—		334,830
Preferred stock	111,236		—		—		111,236
Private label commercial MBS	—		4,691		—		4,691
Private label residential MBS	—		257,128		—		257,128
Residential MBS issued by GSEs	—		1,170,221		—		1,170,221
Trust preferred securities	—		24,314		—		24,314
U.S. treasury securities	2,993		—		—		2,993
Total AFS securities	$	148,914	$	1,823,549	$	10,060	$	1,982,523
Loans - HFS	$	—	$	23,809	$	—	$	23,809
Derivative assets (1)	—		3,569		—		3,569
Liabilities:
Junior subordinated debt (2)	$	—	$	—	$	46,928	$	46,928
Derivative liabilities (1)	—		64,785		—		64,785

(1) Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a positive value of $64,184 and the net carrying value of subordinated debt includes a net negative value of $3,569 as of December 31, 2015, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

(2) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

For the three and six months endedJune 30, 2016 and 2015, the change in Level 3 assets and liabilities measured at fair value on a recurring basis was as follows: 

	Junior Subordinated Debt
	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Beginning balance	$	(45,716	)	$	(40,746	)	$	(46,928	)	$	(40,437	)
Transfers into Level 3	—			—			—			—
Total gains (losses) for the period
Included in other comprehensive income (1)	1,006			(7,736		)	$	2,218		$	(8,045	)
Ending balance	$	(44,710	)	$	(48,482	)	$	(44,710	)	$	(48,482	)

(1)     Due to the Company's election to early adopt an element of ASU 2016-01, changes in the fair value of junior subordinated debt are presented as part

of OCI rather than earnings effective January 1, 2015. Accordingly, total losses are included in the other comprehensive income line, Unrealized gain (loss) on junior subordinated debt, which is net of tax. The above amount represents the gross loss from changes in fair value of junior subordinated debt.

	CDO Securities
	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Beginning balance	$	9,076	$	10,520	$	10,060	$	11,445
Transfers into Level 3	—		—		—		—
Total gains (losses) for the period
Included in other comprehensive income (1)	1,107		284		123		(641		)
Ending balance	$	10,183	$	10,804	$	10,183	$	10,804

(1) Total gains (losses) for the period are included in the other comprehensive income line, Unrealized gain (loss) on AFS securities.

For Level 3 liabilities and assets measured at fair value on a recurring basis as of June 30, 2016 and December 31, 2015, the significant unobservable inputs used in the fair value measurements were as follows: 

	June 30, 2016		Valuation Technique	Significant Unobservable Inputs	Input Value
	(in thousands)
Junior subordinated debt	$	44,710	Discounted cash flow	Implied credit rating of the Company	6.16	%
CDO securities	10,183		S&P Model	Pricing indications from comparable securities

	December 31, 2015		Valuation Technique	Significant Unobservable Inputs	Input Value
	(in thousands)
Junior subordinated debt	$	46,928	Discounted cash flow	Adjusted Corporate Bond over Treasury Index with comparable credit spread	5.67	%
CDO securities	10,060		S&P Model	Pricing indications from comparable securities

The significant unobservable inputs used in the fair value measurement of the Company’s junior subordinated debt as of June 30, 2016 was the implied credit risk for the Company, calculated as the difference between the 20-year 'BB' rated financial index over the corresponding swap index.

The significant unobservable inputs used in the fair value measurement of the Company's CDO securities include securities terms, conditions, and underlying collateral type, as well as trustee and servicer reports, trade data on comparable securities, and market quotes that are converted into spreads to benchmark LIBOR curves. Significant increases or decreases in these inputs could result in significantly different fair value measurements.

Fair value on a nonrecurring basis

Certain assets are measured at fair value on a nonrecurring basis. That is, the assets are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table presents such assets carried on the balance sheet by caption and by level within the ASC 825 hierarchy:

	Fair Value Measurements at the End of the Reporting Period Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Active Markets for Similar Assets (Level 2)		Unobservable Inputs (Level 3)
	(in thousands)
As of June 30, 2016:
Impaired loans with specific valuation allowance	$	14,300	$	—	$	—	$	14,300
Impaired loans without specific valuation allowance (1)	61,869		—		—		61,869
Other assets acquired through foreclosure	49,842		—		—		49,842
As of December 31, 2015:
Impaired loans with specific valuation allowance	$	19,629	$	—	$	—	$	19,629
Impaired loans without specific valuation allowance (1)	66,754		—		—		66,754
Other assets acquired through foreclosure	43,942		—		—		43,942

(1) Excludes loan balances with charge-offs of $33.9 million and $37.8 million as of June 30, 2016 and December 31, 2015, respectively.

For Level 3 assets measured at fair value on a nonrecurring basis as of June 30, 2016 and December 31, 2015, the significant unobservable inputs used in the fair value measurements were as follows: 

	June 30, 2016		Valuation Technique(s)		Significant Unobservable Inputs	Range
	(in thousands)
Impaired loans	$	76,169	Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%
			Discounted cash flow method	Discount rate	Contractual loan rate	4.0% to 7.0%
				Scheduled cash collections	Loss given default	0% to 20.0%
				Proceeds from non-real estate collateral	Loss given default	0% to 70.0%
Other assets acquired through foreclosure	49,842		Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%

	December 31, 2015		Valuation Technique(s)		Significant Unobservable Inputs	Range
	(in thousands)
Impaired loans	$	86,383	Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%
			Discounted cash flow method	Discount rate	Contractual loan rate	4.0% to 7.0%
				Scheduled cash collections	Loss given default	0% to 20.0%
				Proceeds from non-real estate collateral	Loss given default	0% to 70.0%
Other assets acquired through foreclosure	43,942		Collateral method	Third party appraisal	Costs to sell	4.0% to 10.0%

Impaired loans: The specific reserves for collateral dependent impaired loans are based on collateral value, net of estimated disposition costs and other identified quantitative inputs. Collateral value is determined based on independent third-party appraisals or internally-developed discounted cash flow analyses. Appraisals may utilize a single valuation approach or a combination of approaches, including comparable sales and the income approach. Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. In addition, when adjustments are made to an appraised value to reflect various factors such as the age of the appraisal or known changes in the market or the collateral, such valuation inputs are considered unobservable and the fair value measurement is categorized as a Level 3 measurement. Internal discounted cash flow analyses are also utilized to estimate the fair value of impaired loans, which considers internally-developed, unobservable inputs such as discount rates, default rates, and loss severity.

Total Level 3 impaired loans had an estimated fair value of $76.2 million and $86.4 million at June 30, 2016 and December 31, 2015, respectively. Impaired loans with a specific valuation allowance had a gross estimated fair value of $20.7 million and $24.3 million at June 30, 2016 and December 31, 2015, respectively, which was reduced by a specific valuation allowance of $6.4 million and $4.7 million, respectively.

Other assets acquired through foreclosure: Other assets acquired through foreclosure consist of properties acquired as a result of, or in-lieu-of, foreclosure. These assets are initially reported at the fair value determined by independent third-party appraisals using appraised value less estimated cost to sell. Such properties are generally re-appraised every twelve months. There is risk for subsequent volatility. Costs relating to the development or improvement of the assets are capitalized and costs relating to holding the assets are charged to expense.

Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. In addition, when significant adjustments are based on unobservable inputs, such as when a current appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value and there is no observable market price, the resulting fair value measurement has been categorized as a Level 3 measurement. The Company had $49.8 million and $43.9 million of such assets at June 30, 2016 and December 31, 2015, respectively.

Credit vs. non-credit losses

Under the provisions of ASC 320, Investments-Debt and Equity Securities, OTTI is separated into the amount of total impairment related to the credit loss and the amount of the total impairment related to all other factors. The amount of the total OTTI related to the credit loss is recognized in earnings. The amount of the total impairment related to all other factors is recognized in OCI.

For the three and six months endedJune 30, 2016 and 2015, the Company determined that no securities experienced credit losses.

There is no OTTI balance recognized in comprehensive income as of June 30, 2016 and 2015.

FAIR VALUE OF FINANCIAL INSTRUMENTS

The estimated fair value of the Company’s financial instruments is as follows: 

	June 30, 2016
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Investment securities:
HTM	$	36,929	$	—	$	41,162	$	—	$	41,162
AFS	2,165,539		147,210		2,008,146		10,183		2,165,539
Trading	1,326		—		1,326		—		1,326
Derivative assets	7,757		—		7,757		—		7,757
Loans, net	12,755,743		—		12,536,447		76,169		12,612,616
Accrued interest receivable	60,432		—		60,432		—		60,432
Financial liabilities:
Deposits	$	14,201,357	$	—	$	14,205,415	$	—	$	14,205,415
Customer repurchases	38,492		—		38,492		—		38,492
Qualifying debt	382,103		—		—		372,447		372,447
Derivative liabilities	107,097		—		107,097		—		107,097
Accrued interest payable	14,368		—		14,368		—		14,368

	December 31, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Investment securities:
AFS	$	1,982,523	$	148,914	$	1,823,549	$	10,060	$	1,982,523
Trading	1,481		—		1,481		—		1,481
Derivative assets	3,569		—		3,569		—		3,569
Loans, net	11,017,595		—		10,766,826		86,383		10,853,209
Accrued interest receivable	54,445		—		54,445		—		54,445
Financial liabilities:
Deposits	$	12,030,624	$	—	$	12,034,199	$	—	$	12,034,199
Customer repurchases	38,155		—		38,155		—		38,155
FHLB advances	150,000		—		150,000		—		150,000
Qualifying debt	210,328		—		—		207,437		207,437
Derivative liabilities	64,785		—		64,785		—		64,785
Accrued interest payable	13,626		—		13,626		—		13,626

Interest rate risk

The Company assumes interest rate risk (the risk to the Company’s earnings and capital from changes in interest rate levels) as a result of its normal operations. As a result, the fair values of the Company’s financial instruments as well as its future net interest income will change when interest rate levels change and that change may be either favorable or unfavorable to the Company.

Interest rate risk exposure is measured using interest rate sensitivity analysis to determine the Company's change in EVE and net interest income resulting from hypothetical changes in interest rates. If potential changes to EVE and net interest income resulting from hypothetical interest rate changes are not within the limits established by the BOD, the BOD may direct management to adjust the asset and liability mix to bring interest rate risk within BOD-approved limits. As of June 30, 2016, the Company’s interest rate risk profile was within BOD-approved limits.

WAB has an ALCO charged with managing interest rate risk within the BOD-approved limits. Limits are structured to prohibit an interest rate risk profile that does not conform to both management and BOD risk tolerances. There is also ALCO reporting at the Parent company level for reviewing interest rate risk for the Company, which gets reported to the BOD and the Finance and Investment Committee.

Fair value of commitments

The estimated fair value of standby letters of credit outstanding at June 30, 2016 and December 31, 2015 was insignificant. Loan commitments on which the committed interest rates were less than the current market rate were also insignificant at June 30, 2016 and December 31, 2015.

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Segments

6 Months Ended

Jun. 30, 2016

Segment Reporting [Abstract]

Segments

14. SEGMENTS

The Company's reportable segments are aggregated based primarily on geographic location, services offered, and markets served. The Company's regional segments, which include Arizona, Nevada, Southern California, and Northern California, provide full service banking and related services to their respective markets. The operations from the regional segments correspond to the following banking divisions: ABA in Arizona, BON and FIB in Nevada, TPB in Southern California, and Bridge in Northern California.

The Company's NBL segments provide specialized banking services to niche markets. With the purchase of GE's domestic select-service hotel franchise loan portfolio on April 20, 2016, management has created a new operating segment called HFF, which is now included as one of the Company's NBL reportable segments. The Company's other NBL reportable segments include HOA Services, Public & Nonprofit Finance, Technology & Innovation, and Other NBLs. These NBLs are managed centrally and are broader in geographic scope than the Company's other segments, though still predominately located within the Company's core market areas. The HOA Services NBL corresponds to the AAB division. The newly created HFF NBL includes the hotel franchise loan portfolio purchased from GE. Public & Nonprofit Finance consists of the operations of Public and Nonprofit Finance. The Technology & Innovation NBL includes the operations of Equity Fund Resources, Life Sciences Group, Renewable Resource Group, and Technology Finance. The Other NBLs segment consists of Corporate Finance, Mortgage Warehouse Lending, and Resort Finance.

The Corporate & Other segment consists of corporate-related items, income and expense items not allocated to the Company's other reportable segments, and inter-segment eliminations.

The Company's segment reporting process begins with the assignment of all loan and deposit accounts directly to the segments where these products are originated and/or serviced. Equity capital is assigned to each segment based on the risk profile of their assets and liabilities. With the exception of goodwill, which is assigned a 100% weighting, equity capital allocations ranged from 0% to 12% during the year, with a funds credit provided for the use of this equity as a funding source. Any excess or deficient equity not allocated to segments based on risk is assigned to the Corporate & Other segment.

Net interest income, provision for credit losses, and non-interest expense amounts are recorded in their respective segment to the extent that the amounts are directly attributable to those segments. Net interest income is recorded in each segment on a TEB with a corresponding increase in income tax expense, which is eliminated in the Corporate & Other segment.

Further, net interest income of a reportable segment includes a funds transfer pricing process that matches assets and liabilities with similar interest rate sensitivity and maturity characteristics. Using this funds transfer pricing methodology, liquidity is transferred between users and providers. A net user of funds has lending/investing in excess of deposits/borrowings and a net provider of funds has deposits/borrowings in excess of lending/investing. A segment that is a user of funds is charged for the use of funds, while a provider of funds is credited through funds transfer pricing, which is determined based on the average life of the assets or liabilities in the portfolio.

Net income amounts for each reportable segment are further derived by the use of expense allocations. Certain expenses not directly attributable to a specific segment are allocated across all segments based on key metrics, such as number of employees, average loan balances, and average deposit balances. These types of expenses include information technology, operations, human resources, finance, risk management, credit administration, legal, and marketing.

Income taxes are applied to each segment based on the effective tax rate for the geographic location of the segment. Any difference in the corporate tax rate and the aggregate effective tax rates in the segments are adjusted in the Corporate & Other segment.

The following is a summary of selected operating segment information for the periods indicated:

				Regional Segments
Balance Sheet:	Consolidated Company			Arizona			Nevada			Southern California			Northern California
At June 30, 2016	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	2,958.8		$	2.4		$	9.7		$	2.0		$	1.9
Loans, net of deferred loan fees and costs	12,877.8			2,897.6			1,727.0			1,801.2			1,139.5
Less: allowance for credit losses	(122.1		)	(30.9		)	(19.9		)	(19.5		)	(8.4		)
Total loans	12,755.7			2,866.7			1,707.1			1,781.7			1,131.1
Other assets acquired through foreclosure, net	49.8			7.3			21.0			—			0.3
Goodwill and other intangible assets, net	304.3			—			24.2			—			157.5
Other assets	660.2			44.3			60.3			16.4			14.1
Total assets	$	16,728.8		$	2,920.7		$	1,822.3		$	1,800.1		$	1,304.9
Liabilities:
Deposits	$	14,201.4		$	3,801.4		$	3,623.0		$	2,404.0		$	1,510.9
Borrowings and qualifying debt	382.1			—			—			—			—
Other liabilities	349.1			11.7			28.6			9.3			9.8
Total liabilities	14,932.6			3,813.1			3,651.6			2,413.3			1,520.7
Allocated equity:	1,796.2			337.6			248.3			205.8			287.2
Total liabilities and stockholders' equity	$	16,728.8		$	4,150.7		$	3,899.9		$	2,619.1		$	1,807.9
Excess funds provided (used)	—			1,230.0			2,077.6			819.0			503.0

Income Statement:
Three Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	163,686		$	41,204		$	33,464		$	25,803		$	21,896
Provision for (recovery of) credit losses	2,500			1,703			(1,704		)	220			926
Net interest income (expense) after provision for credit losses	161,186			39,501			35,168			25,583			20,970
Non-interest income	8,559			888			2,097			561			2,516
Non-interest expense	(81,804		)	(14,550		)	(14,824		)	(10,635		)	(13,481		)
Income (loss) before income taxes	87,941			25,839			22,441			15,509			10,005
Income tax expense (benefit)	26,327			10,137			7,855			6,522			4,206
Net income	$	61,614		$	15,702		$	14,586		$	8,987		$	5,799

Six Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	309,397		$	79,660		$	66,039		$	50,231		$	45,091
Provision for (recovery of) credit losses	5,000			8,476			(2,517		)	250			1,968
Net interest income (expense) after provision for credit losses	304,397			71,184			68,556			49,981			43,123
Non-interest income	21,692			4,569			4,156			1,221			4,942
Non-interest expense	(157,297		)	(29,006		)	(29,570		)	(21,869		)	(27,448		)
Income (loss) before income taxes	168,792			46,747			43,142			29,333			20,617
Income tax expense (benefit)	45,846			18,339			15,100			12,335			8,669
Net income	$	122,946		$	28,408		$	28,042		$	16,998		$	11,948

	National Business Lines
Balance Sheet:	HOA Services			HFF			Public & Nonprofit Finance			Technology & Innovation			Other NBL			Corporate & Other
At June 30, 2016	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	—		$	—		$	—		$	—		$	—		$	2,942.8
Loans, net of deferred loan fees and costs	98.3			1,262.8			1,481.4			943.5			1,498.6			27.9
Less: allowance for credit losses	(1.1		)	(0.1		)	(16.1		)	(9.6		)	(16.2		)	(0.3		)
Total loans	97.2			1,262.7			1,465.3			933.9			1,482.4			27.6
Other assets acquired through foreclosure, net	—			—			—			—			—			21.2
Goodwill and other intangible assets, net	—			0.2			—			122.4			—			—
Other assets	0.3			20.0			14.1			3.7			11.3			475.7
Total assets	$	97.5		$	1,282.9		$	1,479.4		$	1,060.0		$	1,493.7		$	3,467.3
Liabilities:
Deposits	$	1,711.3		$	—		$	—		$	963.0		$	—		$	187.8
Borrowings and qualifying debt	—			—			—			—			—			382.1
Other liabilities	1.4			15.0			105.5			—			36.4			131.4
Total liabilities	1,712.7			15.0			105.5			963.0			36.4			701.3
Allocated equity:	43.6			104.9			89.3			217.4			124.1			138.0
Total liabilities and stockholders' equity	$	1,756.3		$	119.9		$	194.8		$	1,180.4		$	160.5		$	839.3
Excess funds provided (used)	1,658.8			(1,163.0		)	(1,284.6		)	120.4			(1,333.2		)	(2,628.0		)

Income Statement:
Three Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	9,909		$	12,068		$	5,026		$	16,631		$	12,523		$	(14,838	)
Provision for (recovery of) credit losses	10			—			175			(614		)	1,699			85
Net interest income (expense) after provision for credit losses	9,899			12,068			4,851			17,245			10,824			(14,923		)
Non-interest income	110			—			7			1,115			235			1,030
Non-interest expense	(5,820		)	(2,557		)	(1,929		)	(7,434		)	(3,598		)	(6,976		)
Income (loss) before income taxes	4,189			9,511			2,929			10,926			7,461			(20,869		)
Income tax expense (benefit)	1,571			3,567			1,098			4,097			2,798			(15,524		)
Net income	$	2,618		$	5,944		$	1,831		$	6,829		$	4,663		$	(5,345	)

Six Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	18,541		$	12,068		$	10,247		$	32,940		$	23,160		$	(28,580	)
Provision for (recovery of) credit losses	88			—			(194		)	(1,779		)	1,937			(3,229		)
Net interest income (expense) after provision for credit losses	18,453			12,068			10,441			34,719			21,223			(25,351		)
Non-interest income	215			—			3			2,752			870			2,964
Non-interest expense	(11,361		)	(2,557		)	(3,953		)	(14,340		)	(7,035		)	(10,158		)
Income (loss) before income taxes	7,307			9,511			6,491			23,131			15,058			(32,545		)
Income tax expense (benefit)	2,740			3,567			2,434			8,674			5,647			(31,659		)
Net income	$	4,567		$	5,944		$	4,057		$	14,457		$	9,411		$	(886	)

				Regional Segments
Balance Sheet:	Consolidated Company			Arizona			Nevada			Southern California			Northern California
At December 31, 2015	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	2,266.8		$	2.3		$	9.5		$	2.4		$	2.4
Loans, net of deferred loan fees and costs	11,136.7			2,811.7			1,737.2			1,761.9			1,188.4
Less: allowance for credit losses	(119.1		)	(30.1		)	(18.6		)	(18.8		)	(12.7		)
Total loans	11,017.6			2,781.6			1,718.6			1,743.1			1,175.7
Other assets acquired through foreclosure, net	43.9			8.4			20.8			—			0.3
Goodwill and other intangible assets, net	305.4			—			24.8			—			158.2
Other assets	641.4			43.9			62.3			15.7			16.1
Total assets	$	14,275.1		$	2,836.2		$	1,836.0		$	1,761.2		$	1,352.7
Liabilities:
Deposits	$	12,030.6		$	2,880.7		$	3,382.8		$	1,902.5		$	1,541.1
Borrowings and qualifying debt	360.3			—			—			—			—
Other liabilities	292.7			12.2			29.0			7.8			11.2
Total liabilities	12,683.6			2,892.9			3,411.8			1,910.3			1,552.3
Allocated equity:	1,591.5			309.2			244.4			191.3			293.2
Total liabilities and stockholders' equity	$	14,275.1		$	3,202.1		$	3,656.2		$	2,101.6		$	1,845.5
Excess funds provided (used)	—			365.9			1,820.2			340.4			492.8

Income Statement:
Three Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	108,718		$	32,091		$	29,946		$	24,070		$	5,216
Provision for (recovery of) credit losses	—			826			(3,148		)	633			513
Net interest income (expense) after provision for credit losses	108,718			31,265			33,094			23,437			4,703
Non-interest income	5,545			1,008			2,370			850			271
Non-interest expense	(61,209		)	(14,600		)	(15,032		)	(11,858		)	(1,913		)
Income (loss) before income taxes	53,054			17,673			20,432			12,429			3,061
Income tax expense (benefit)	13,579			6,934			7,151			5,227			1,287
Net income	$	39,475		$	10,739		$	13,281		$	7,202		$	1,774

Six Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	211,826		$	61,076		$	59,155		$	46,560		$	9,669
Provision for (recovery of) credit losses	700			158			(2,799		)	266			486
Net interest income (expense) after provision for credit losses	211,126			60,918			61,954			46,294			9,183
Non-interest income	11,787			1,947			4,653			1,515			322
Non-interest expense	(115,242		)	(29,361		)	(29,506		)	(23,479		)	(3,930		)
Income (loss) before income taxes	107,671			33,504			37,101			24,330			5,575
Income tax expense (benefit)	27,813			13,144			12,985			10,231			2,344
Net income	$	79,858		$	20,360		$	24,116		$	14,099		$	3,231

	National Business Lines
Balance Sheet:	HOA Services			Public & Nonprofit Finance			Technology & Innovation			Other NBL			Corporate & Other
At December 31, 2015	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	—		$	—		$	—		$	—		$	2,250.2
Loans, net of deferred loan fees and costs	88.4			1,458.9			770.3			1,280.3			39.6
Less: allowance for credit losses	(0.9		)	(15.6		)	(8.2		)	(13.8		)	(0.4		)
Total loans	87.5			1,443.3			762.1			1,266.5			39.2
Other assets acquired through foreclosure, net	—			—			—			—			14.4
Goodwill and other intangible assets, net	—			—			122.4			—			—
Other assets	0.2			14.0			2.7			11.5			475.0
Total assets	$	87.7		$	1,457.3		$	887.2		$	1,278.0		$	2,778.8
Liabilities:
Deposits	$	1,291.9		$	—		$	842.5		$	—		$	189.1
Borrowings and qualifying debt	—			—			—			—			360.3
Other liabilities	0.5			63.8			—			40.8			127.4
Total liabilities	1,292.4			63.8			842.5			40.8			676.8
Allocated equity:	34.2			87.8			200.9			105.7			124.8
Total liabilities and stockholders' equity	$	1,326.6		$	151.6		$	1,043.4		$	146.5		$	801.6
Excess funds provided (used)	1,238.9			(1,305.7		)	156.2			(1,131.5		)	(1,977.2		)

Income Statement:
Three Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	6,436		$	4,903		$	—	$	13,093		$	(7,037	)
Provision for (recovery of) credit losses	71			1,469			—		(288		)	(76		)
Net interest income (expense) after provision for credit losses	6,365			3,434			—		13,381			(6,961		)
Non-interest income	80			433			—		(192		)	725
Non-interest expense	(4,100		)	(1,384		)	—		(4,061		)	(8,261		)
Income (loss) before income taxes	2,345			2,483			—		9,128			(14,497		)
Income tax expense (benefit)	880			932			—		3,423			(12,255		)
Net income	$	1,465		$	1,551		$	—	$	5,705		$	(2,242	)

Six Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	12,204		$	9,484		$	—	$	26,054		$	(12,376	)
Provision for (recovery of) credit losses	141			2,106			—		413			(71		)
Net interest income (expense) after provision for credit losses	12,063			7,378			—		25,641			(12,305		)
Non-interest income	153			639			—		245			2,313
Non-interest expense	(8,470		)	(2,637		)	—		(7,716		)	(10,143		)
Income (loss) before income taxes	3,746			5,380			—		18,170			(20,135		)
Income tax expense (benefit)	1,405			2,018			—		6,814			(21,128		)
Net income	$	2,341		$	3,362		$	—	$	11,356		$	993

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Mergers, Acquisitions and Dispositions

6 Months Ended

Jun. 30, 2016

Business Combinations [Abstract]

Mergers and Acquisitions

15. MERGERS AND ACQUISITIONS

GE Capital US Holdings, Inc. Loan Portfolio

On April 20, 2016, WAB completed its purchase of GE Capital US Holdings, Inc.'s domestic select-service hotel franchise finance loan portfolio, paying cash of $1.27 billion.

Beginning April 20, 2016, the results of the purchased loan portfolio has been reflected in the Company's newly created HFF NBL operating segment. Acquisition / restructure expenses related to the purchase total $1.9 million for the three and six months ended June 30, 2016. The purchase was accounted for under the acquisition method of accounting in accordance with ASC 805. Assets purchased and liabilities assumed were recorded at their respective acquisition date estimated fair values. The fair values of assets acquired and liabilities assumed are subject to adjustment during the first twelve months after the acquisition date if additional information becomes available to indicate a more accurate or appropriate value for an asset or liability. Although measurement period adjustments are not expected to be significant, the fair values of loans and other liabilities are still preliminary as of June 30, 2016.

The recognized amounts of identifiable assets acquired and liabilities assumed are as follows:

	April 20, 2016
	(in thousands)
Assets:
Loans	$	1,280,997
Other assets	3,560
Total assets	$	1,284,557
Liabilities:
Other liabilities	$	12,559
Total liabilities	12,559
Net assets acquired	$	1,271,998
Consideration paid
Cash	$	1,272,187
Goodwill	$	189

The following table presents pro forma information as if the purchase was completed on January 1, 2015. The pro forma information includes adjustments for interest income on loans acquired and excludes acquisition / restructure expense. The pro forma information is not necessarily indicative of the results of operations as they would have been had the transactions been effected on the assumed dates.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands, except per share amounts)
Interest income	$	172,779	$	133,247	$	343,664	$	260,838
Non-interest income	8,559		5,545		21,692		11,787
Net income available to common stockholders	61,749		38,234		130,240		97,449
Earnings per share - basic	0.60		0.43		1.27		1.11
Earnings per share - diluted	0.60		0.43		1.26		1.10

Bridge Capital Holdings

On June 30, 2015, the Company completed its acquisition of Bridge Capital Holdings and its wholly-owned subsidiary, Bridge Bank, headquartered in San Jose, California. Under the terms of the acquisition, each outstanding share of Bridge common stock was exchanged for 0.8145 shares of WAL's common stock plus $2.39 in cash. The Company paid $36.5 million in cash and issued 12.5 million common shares for all equity interests in Bridge. The merger was undertaken, in part, because Bridge strengthens the Company's Northern California presence and provides new avenues for growth in technology and international services.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805. Assets purchased and liabilities assumed were recorded at their respective acquisition date estimated fair values. The fair values of assets acquired and liabilities assumed were subject to adjustment during the first twelve months after the acquisition date if additional information became available to indicate a more accurate or appropriate value for an asset or liability.

During the six months ended June 30, 2016, the Company identified $1.5 million in measurement period adjustments from the Bridge acquisition, primarily related to reductions in other assets and accrued liabilities. As the measurement period for the Bridge acquisition ended on June 30, 2016, there will be no additional measurement period adjustments recorded as the fair values of these assets acquired and liabilities assumed are final.

The following table presents pro forma information as if the Bridge acquisition was completed on January 1, 2014.The pro forma information includes adjustments for interest income on loans and securities acquired, amortization of intangibles arising from the transaction and interest expense on deposits acquired. The pro forma information is not necessarily indicative of the results of operations as they would have been had the transactions been effected on the assumed date.

	Three Months Ended June 30, 2015:		Six Months Ended June 30, 2015:
	(in thousands, except per share amounts)
Interest income	$	139,080	$	271,502
Non-interest income	1,840		11,047
Net income available to common stockholders (1)	45,607		90,372
Earnings per share - basic	0.45		0.89
Earnings per share - diluted	0.44		0.88

(1) Excludes acquisition / restructure related costs incurred by the Company and by Bridge of $7.8 million and $8.0 million for the three and six months ended June 30, 2015,

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2016

Accounting Policies [Abstract]

Basis of Presentation

Basis of presentation

The accounting and reporting policies of the Company are in accordance with GAAP and conform to practices within the financial services industry. The accounts of the Company and its consolidated subsidiaries are included in the Unaudited Consolidated Financial Statements.

Use of Estimates

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management evaluates these estimates and judgments on an ongoing basis and bases its estimates on experience, current and expected future conditions, third-party evaluations and various other assumptions that management believes are reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from those estimates and assumptions used in the Unaudited Consolidated Financial Statements and related notes. Material estimates that are particularly susceptible to significant changes in the near term relate to the determination of the allowance for credit losses; estimated cash flows related to PCI loans; fair value determinations related to acquisitions and other assets and liabilities carried at fair value; and accounting for income taxes.

Principles of Consolidation

Principles of consolidation

As of June 30, 2016, WAL has ten wholly-owned subsidiaries: WAB, LVSP, and eight unconsolidated subsidiaries used as business trusts in connection with the issuance of trust-preferred securities.

The Bank has the following significant wholly-owned subsidiaries: WAB Investments, Inc., BON Investments, Inc., and TPB Investments, Inc., which hold certain investment securities, municipal and nonprofit loans, and leases; and BW Real Estate, Inc., which operates as a real estate investment trust and holds certain of WAB's real estate loans and related securities.

The Company does not have any other significant entities that should be considered for consolidation. All significant intercompany balances and transactions have been eliminated in consolidation.

Reclassifications

Reclassifications

Certain amounts in the Consolidated Financial Statements as of December 31, 2015 and for the three and six months endedJune 30, 2015 have been reclassified to conform to the current presentation. The reclassifications have no effect on net income or stockholders’ equity as previously reported.

Business Combinations

Business combinations

Business combinations are accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations. Under the acquisition method, the acquiring entity in a business combination recognizes all of the acquired assets and assumed liabilities at their estimated fair values as of the date of acquisition. Any excess of the purchase price over the fair value of net assets and other identifiable intangible assets acquired is recorded as goodwill. To the extent the fair value of net assets acquired, including identified intangible assets, exceeds the purchase price, a bargain purchase gain is recognized. Changes to estimated fair values from a business combination are recognized as an adjustment to goodwill during the measurement period and are recognized in the reporting period in which the adjustment amounts are determined. Results of operations of an acquired business are included in the Consolidated Income Statement from the date of acquisition. Acquisition-related costs, including conversion and restructuring charges, are expensed as incurred.

Investment Securities

Investment securities

Investment securities may be classified as HTM, AFS, or measured at fair value. The appropriate classification is initially decided at the time of purchase. Securities classified as HTM are those debt securities that the Company has both the intent and ability to hold to maturity regardless of changes in market conditions, liquidity needs, or general economic conditions. These securities are carried at amortized cost. The sale of a security within three months of its maturity date or after the majority of the principal outstanding has been collected is considered a maturity for purposes of classification and disclosure.

In May 2014, management reassessed its intent to hold certain CDOs classified as HTM, which necessitated a reclassification of all of the Company's HTM securities to AFS at the date of the transfer. As an extended period of time has passed since this reclassification was made, management believes that the Company is again able to assert as of March 31, 2016 that it has both the intent and ability to hold certain securities classified as HTM to maturity. See "Note 2. Investment Securities" of these Notes to Unaudited Consolidated Financial Statements for additional detail related to HTM securities.

Securities classified as AFS or trading securities measured at fair value are reported as an asset in the Consolidated Balance Sheet at their estimated fair value. As the fair value of AFS securities changes, the changes are reported net of income tax as an element of OCI, except for other-than-temporarily-impaired securities. When AFS securities are sold, the unrealized gain or loss is reclassified from OCI to non-interest income. The changes in the fair values of trading securities are reported in non-interest income. Securities classified as AFS are both equity and debt securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity. Any decision to sell a security classified as AFS would be based on various factors, including significant movements in interest rates, changes in the maturity mix of the Company’s assets and liabilities, liquidity needs, decline in credit quality, and regulatory capital considerations.

Interest income is recognized based on the coupon rate and increased by accretion of discounts earned or decreased by the amortization of premiums paid over the contractual life of the security, adjusted for prepayment estimates, using the interest method.

In estimating whether there are any OTTI losses, management considers the 1) length of time and the extent to which the fair value has been less than amortized cost; 2) financial condition and near term prospects of the issuer; 3) impact of changes in market interest rates; and 4) intent and ability of the Company to retain its investment for a period of time sufficient to allow for any anticipated recovery in fair value and whether it is not more likely than not the Company would be required to sell the security.

Declines in the fair value of individual AFS debt securities that are deemed to be other-than-temporary are reflected in earnings when identified. The fair value of the debt security then becomes the new cost basis. For individual debt securities where the Company does not intend to sell the security and it is not more likely than not that the Company will be required to sell the security before recovery of its amortized cost basis, the other-than-temporary decline in fair value of the debt security related to 1) credit loss is recognized in earnings; and 2) interest rate, market, or other factors is recognized in other comprehensive income or loss.

For individual debt securities where the Company either intends to sell the security or more likely than not will not recover all of its amortized cost, the OTTI is recognized in earnings equal to the entire difference between the security's cost basis and its fair value at the balance sheet date. For individual debt securities for which a credit loss has been recognized in earnings, interest accruals and amortization and accretion of premiums and discounts are suspended when the credit loss is recognized. Interest received after accruals have been suspended is recognized on a cash basis.

Restricted Stock

Restricted stock

On January 30, 2015, WAB became a member of the Federal Reserve System and, as part of its membership, is required to maintain stock in the FRB in a specified ratio to its capital. In addition, WAB is a member of the FHLB system and, accordingly, maintains an investment in capital stock of the FHLB based on the borrowing capacity used. The Bank also maintains an investment in its primary correspondent bank. All of these investments are considered equity securities with no actively traded market. Therefore, the shares are considered restricted investment securities. These investments are carried at cost, which is equal to the value at which they may be redeemed. The dividend income received from the stock is reported in interest income. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists.

Loans Held-for-sale

Loans, held for sale

Loans, held for sale consist primarily of SBA and CRE loans that the Company originates (or acquires) and intends to sell. These loans are carried at the lower of aggregate cost or fair value. Fair value is determined based on available market data for similar assets, expected cash flows, and appraisals of underlying collateral or the credit quality of the borrower. Gains and losses on the sale of loans are recognized pursuant to ASC 860, Transfers and Servicing. Interest income of these loans is accrued daily and loan origination fees and costs are deferred and included in the cost basis of the loan. The Company issues various representations and warranties associated with these loan sales. The Company has not experienced any losses as a result of these representations and warranties.

Loans Held for Investment

Loans, held for investment

The Company generally holds loans for investment and has the intent and ability to hold loans until their maturity. Therefore, they are reported at book value. Net loans are stated at the amount of unpaid principal, adjusted for net deferred fees and costs, purchase accounting fair value adjustments, and an allowance for credit losses. In addition, the book value of loans that are subject to a fair value hedge is adjusted for changes in value attributable to the effective portion of the hedged benchmark interest rate risk.

The Company may also acquire loans through a business combination. These acquired loans are recorded at estimated fair value on the date of purchase, which is comprised of unpaid principal adjusted for estimated credit losses and interest rate fair value adjustments. Loans are evaluated individually to determine if there has been credit deterioration since origination. Such loans may then be aggregated and accounted for as a pool of loans based on common characteristics. When the Company acquires such loans, the yield that may be accreted (accretable yield) is limited to the excess of the Company’s estimate of undiscounted cash flows expected to be collected over the Company’s initial investment in the loan. The excess of contractual cash flows over the cash flows expected to be collected may not be recognized as an adjustment to yield, loss, or a valuation allowance. Subsequent increases in cash flows expected to be collected generally are recognized prospectively through adjustment of the loan’s yield over the remaining life. Subsequent decreases to cash flows expected to be collected are recognized as impairment. The Company may not carry over or create a valuation allowance in the initial accounting for loans acquired under these circumstances. For purchased loans that are not deemed impaired, fair value adjustments attributable to both credit and interest rates are accreted (or amortized) over the contractual life of the individual loan. For additional information, see "Note 3. Loans, Leases and Allowance for Credit Losses" of these Notes to Unaudited Consolidated Financial Statements.

Loan fees collected for the origination of loans less direct loan origination costs (net deferred loan fees) are amortized over the contractual life of the loan through interest income. If the loan has scheduled payments, the amortization of the net deferred loan fee is calculated using the interest method over the contractual life of the loan. If the loan does not have scheduled payments, such as a line of credit, the net deferred loan fee is recognized as interest income on a straight-line basis over the contractual life of the loan commitment. Commitment fees based on a percentage of a customer’s unused line of credit and fees related to standby letters of credit are recognized over the commitment period. When loans are repaid, any remaining unamortized balances of premiums, discounts, or net deferred fees are recognized as interest income.

Non-accrual loans: For all loan types except credit cards, when a borrower discontinues making payments as contractually required by the note, the Company must determine whether it is appropriate to continue to accrue interest. The Company ceases accruing interest income when the loan has become delinquent by more than 90 days or when management determines that the full repayment of principal and collection of interest according to contractual terms is no longer likely. The Company may decide to continue to accrue interest on certain loans more than 90 days delinquent if the loans are well secured by collateral and in the process of collection. Credit card loans and other personal loans are typically charged off no later than 180 days delinquent.

For all loan types, when a loan is placed on non-accrual status, all interest accrued but uncollected is reversed against interest income in the period in which the status is changed and, the Company makes a loan-level decision to apply either the cash basis or cost recovery method. The Company recognizes income on a cash basis only for those non-accrual loans for which the collection of the remaining principal balance is not in doubt. Under the cost recovery method, subsequent payments received from the customer are applied to principal and generally no further interest income is recognized until the principal has been paid in full or until circumstances have changed such that payments are again consistently received as contractually required.

Impaired loans: A loan is identified as impaired when it is no longer probable that interest and principal will be collected according to the contractual terms of the original loan agreement. Generally, impaired loans are classified as non-accrual. However, in certain instances, impaired loans may continue on an accrual basis, if full repayment of all principal and interest is expected and the loan is both well secured and in the process of collection. Impaired loans are measured for reserve requirements in accordance with ASC 310, Receivables, based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral less applicable disposition costs if the loan is collateral dependent. The amount of an impairment reserve, if any, and any subsequent changes are recorded as a provision for credit losses. Losses are recorded as a charge-off when losses are confirmed. In addition to management's internal loan review process, regulators may from time to time direct the Company to modify loan grades, loan impairment calculations, or loan impairment methodology.

Troubled Debt Restructured Loans: A TDR loan is a loan on which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in the accrued interest, or deferral of interest payments. A TDR loan is also considered impaired. A TDR loan may be returned to accrual status when the loan is brought current, has performed in accordance with the contractual restructured terms for a reasonable period of time (generally six months) and the ultimate collectability of the total contractual restructured principal and interest is no longer in doubt. However, such loans continue to be considered impaired. Consistent with regulatory guidance, a TDR loan that is subsequently modified in another restructuring agreement but has shown sustained performance and classification as a TDR, will be removed from TDR status provided that the modified terms were market-based at the time of modification.

Allowance for Credit Losses

Allowance for credit losses

Credit risk is inherent in the business of extending loans and leases to borrowers, for which the Company must maintain an adequate allowance for credit losses. The allowance for credit losses is established through a provision for credit losses recorded to expense. Loans are charged against the allowance for credit losses when management believes that the contractual principal or interest will not be collected. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount believed adequate to absorb estimated probable losses on existing loans that may become uncollectable, based on evaluation of the collectability of loans and prior credit loss experience, together with other factors. The Company formally re-evaluates and establishes the appropriate level of the allowance for credit losses on a quarterly basis.

The allowance consists of specific and general components. The specific allowance applies to impaired loans. For impaired collateral dependent loans, the reserve is calculated based on the collateral value, net of estimated disposition costs. Generally, the Company obtains independent collateral valuation analysis for each loan every twelve months. Loans not collateral dependent are evaluated based on the expected future cash flows discounted at the original contractual interest rate.

The general allowance covers all non-impaired loans and is based on historical loss experience adjusted for various qualitative and quantitative factors listed below.

The Company’s allowance for credit loss methodology incorporates several quantitative and qualitative risk factors used to establish the appropriate allowance for credit losses at each reporting date. Quantitative factors include: 1) the Company's historical loss experience; 2) levels of and trends in delinquencies and impaired loans; 3) levels of and trends in charge-offs and recoveries; 4) trends in volume and terms of loans; 5) changes in underwriting standards or lending policies; 6) experience, ability, depth of lending staff; 7) national and local economic trends and conditions; 8) changes in credit concentrations; 9) out-of-market exposures; 10) changes in quality of loan review system; and 11) changes in the value of underlying collateral.

An internal ten-year loss history is also incorporated into the allowance calculation model. Due to the credit concentration of the Company's loan portfolio in real estate secured loans, the value of collateral is heavily dependent on real estate values in Nevada, Arizona, and California. While management uses the best information available to make its evaluation, future adjustments to the allowance may be necessary if there are significant changes in economic or other conditions. In addition, regulators, as an integral part of their examination processes, periodically review the Bank's allowance for credit losses, and may require the Bank to make additions to the allowance based on their judgment about information available to them at the time of their examination. Management regularly reviews the assumptions and formulae used in determining the allowance and makes adjustments if required to reflect the current risk profile of the portfolio.

Other Assets Acquired Through Foreclosure

Other assets acquired through foreclosure

Other assets acquired through foreclosure consist primarily of properties acquired as a result of, or in-lieu-of, foreclosure. Properties or other assets (primarily repossessed assets formerly leased) are classified as OREO and other repossessed property and are initially reported at fair value of the asset less estimated selling costs. Subsequent adjustments are based on the lower of carrying value or fair value less estimated costs to sell the property. Costs related to the development or improvement of the assets are capitalized and costs related to holding the assets are charged to non-interest expense. Property is evaluated regularly to ensure the recorded amount is supported by its current fair value and valuation allowances.

Goodwill and Other Intangible Assets

Goodwill and other intangible assets

The Company records as goodwill the excess of the purchase price over the fair value of the identifiable net assets acquired in accordance with applicable guidance. The Company performs its annual goodwill and intangibles impairment tests as of October 1 each year, or more often if events or circumstances indicate that the carrying value may not be recoverable. During the three and six months endedJune 30, 2016 and 2015, there were no events or circumstances that indicated that an interim impairment test of goodwill or other intangible assets was necessary.

Treasury Shares

Treasury Shares

Effective January 1, 2016, the Company has separately presented treasury shares, which represents shares surrendered to the Company equal in value to the statutory payroll tax withholding obligations arising from the vesting of employee restricted stock awards. Prior period amounts have been adjusted to reflect this new presentation, with no change in total stockholders' equity. The Company carries treasury shares at cost.

Derivative Financial Instruments

Derivative financial instruments

The Company uses interest-rate swaps to mitigate interest-rate risk associated with changes to 1) the fair value of certain fixed-rate financial instruments (fair value hedges) and 2) certain cash flows related to future interest payments on variable rate financial instruments (cash flow hedges).

The Company recognizes derivatives as assets or liabilities in the Consolidated Balance Sheet at their fair value in accordance with ASC 815, Derivatives and Hedging. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship. On the date the derivative contract is entered into, the Company designates the derivative as a fair value hedge or cash flow hedge. Derivative instruments designated in a hedge relationship to mitigate exposure to changes in the fair value of an asset or liability attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivative instruments designated in a hedge relationship to mitigate exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.

Changes in the fair value of a derivative that is designated and qualifies as a fair value hedge, along with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk are recorded in current-period earnings. For a cash flow hedge, the effective portion of the change in the fair value of the derivative is recorded in AOCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Any ineffective portion of the change in fair value of a cash flow hedge is recognized immediately in non-interest income in the Consolidated Income Statement. Under both the fair value and cash flow hedge scenarios, changes in the fair value of derivatives not considered to be highly effective in hedging the change in fair value or the expected cash flows of the hedged item are recognized in earnings as non-interest income during the period of the change.

The Company documents its hedge relationships, including identification of the hedging instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction at the time the derivative contract is executed. Both at inception and at least quarterly thereafter, the Company assesses whether the derivatives used in hedging transactions are highly effective (as defined in the guidance) in offsetting changes in either the fair value or cash flows of the hedged item. Retroactive effectiveness is assessed, as well as the continued expectation that the hedge will remain effective prospectively. The Company discontinues hedge accounting prospectively when it is determined that a hedge is no longer highly effective. When hedge accounting is discontinued on a fair value hedge that no longer qualifies as an effective hedge, the derivative continues to be reported at fair value in the Consolidated Balance Sheet, but the carrying amount of the hedged item is no longer adjusted for future changes in fair value. The adjustment to the carrying amount of the hedged item that existed at the date hedge accounting is discontinued is amortized over the remaining life of the hedged item into earnings.

Derivative instruments that are not designated as hedges, so called free-standing derivatives, are reported in the Consolidated Balance Sheet at fair value and the changes in fair value are recognized in earnings as non-interest income during the period of change.

The Company may in the normal course of business purchase a financial instrument or originate a loan that contains an embedded derivative instrument. Upon purchasing the instrument or originating the loan, the Company assesses whether the economic characteristics of the embedded derivative are clearly and closely related to the economic characteristics of the remaining component of the financial instrument (i.e., the host contract) and whether a separate instrument with the same terms as the embedded instrument would meet the definition of a derivative instrument. When it is determined that the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is separated from the host contract and carried at fair value. However, in cases where the host contract is measured at fair value, with changes in fair value reported in current earnings, or the Company is unable to reliably identify and measure an embedded derivative for separation from its host contract, the entire contract is carried in the Consolidated Balance Sheet at fair value and is not designated as a hedging instrument.

Income Taxes

Income taxes

The Company is subject to income taxes in the United States and files a consolidated federal income tax return with all of its subsidiaries, with the exception of BW Real Estate, Inc. Deferred income taxes are recorded to reflect the effects of temporary differences between the financial reporting carrying amounts of assets and liabilities and their income tax bases using enacted tax rates that are expected to be in effect when the taxes are actually paid or recovered. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.

Net deferred tax assets are recorded to the extent that these assets will more-likely-than-not be realized. In making these determinations, all available positive and negative evidence is considered, including scheduled reversals of deferred tax liabilities, tax planning strategies, projected future taxable income, and recent operating results. If it is determined that deferred income tax assets to be realized in the future are in excess of their net recorded amount, an adjustment to the valuation allowance will be recorded, which will reduce the Company's provision for income taxes.

A tax benefit from an unrecognized tax benefit may be recognized when it is more-likely-than-not that the position will be sustained upon examination, including related appeals or litigation, based on technical merits. Income tax benefits must meet a more-likely-than-not recognition threshold at the effective date to be recognized.

Interest and penalties related to unrecognized tax benefits are recognized as part of the provision for income taxes in the Consolidated Income Statement. Accrued interest and penalties are included in the related tax liability line with other liabilities in the Consolidated Balance Sheet.

Off-Balance Sheet Instruments

Off-balance sheet instruments

In the ordinary course of business, the Company has entered into off-balance sheet financial instrument arrangements consisting of commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the Consolidated Financial Statements when they are funded. They involve, to varying degrees, elements of credit risk in excess of amounts recognized in the Consolidated Balance Sheet. Losses would be experienced when the Company is contractually obligated to make a payment under these instruments and must seek repayment from the borrower, which may not be as financially sound in the current period as they were when the commitment was originally made. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral.

As with outstanding loans, the Company applies qualitative factors and utilization rates to its off-balance sheet obligations in determining an estimate of losses inherent in these contractual obligations. The estimate for credit losses on off-balance sheet instruments is included in other liabilities and the charge to income that establishes this liability is included in non-interest expense.

The Company also has off-balance sheet arrangements related to its derivative instruments. Derivative instruments are recognized in the Consolidated Financial Statements at fair value and their notional values are carried off-balance sheet.

Fair Values of Financial Instruments

Fair values of financial instruments

The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities. ASC 820, Fair Value Measurement, establishes a framework for measuring fair value and a three-level valuation hierarchy for disclosure of fair value measurement as well as enhances disclosure requirements for fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The Company uses various valuation approaches, including market, income, and/or cost approaches. ASC 820 establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would consider in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the reliability of inputs, as follows:

• Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

• Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market.

• Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques.

The availability of observable inputs varies based on the nature of the specific financial instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety.

Fair value is a market-based measure considered from the perspective of a market participant who may purchase the asset or assume the liability rather than an entity-specific measure. When market assumptions are available, ASC 820 requires the Company to make assumptions regarding the assumptions that market participants would use to estimate the fair value of the financial instrument at the measurement date.

ASC 825, Financial Instruments, requires disclosure of fair value information about financial instruments, whether or not recognized in the balance sheet, for which it is practicable to estimate that value.

Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates presented herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction at June 30, 2016 and 2015. The estimated fair value amounts for June 30, 2016 and 2015 have been measured as of period-end, and have not been re-evaluated or updated for purposes of these Consolidated Financial Statements subsequent to those dates. As such, the estimated fair values of these financial instruments subsequent to the reporting date may be different than the amounts reported at period-end.

The information in "Note 13. Fair Value Accounting" in these Notes to Unaudited Consolidated Financial Statements should not be interpreted as an estimate of the fair value of the entire Company since a fair value calculation is only required for a limited portion of the Company’s assets and liabilities.

Due to the wide range of valuation techniques and the degree of subjectivity used in making the estimate, comparisons between the Company’s disclosures and those of other companies or banks may not be meaningful.

The following methods and assumptions were used by the Company in estimating the fair value of its financial instruments:

Cash and cash equivalents

The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks approximate their fair value.

Money market investments

The carrying amounts reported in the Consolidated Balance Sheets for money market investments approximate their fair value.

Investment securities

The fair values of CRA investments, mutual funds, and exchange-listed preferred stock are based on quoted market prices and are categorized as Level 1 in the fair value hierarchy.

The fair values of other investment securities were determined based on matrix pricing. Matrix pricing is a mathematical technique that utilizes observable market inputs including, for example, yield curves, credit ratings, and prepayment speeds. Fair values determined using matrix pricing are generally categorized as Level 2 in the fair value hierarchy.

The Company owns certain CDOs for which quoted prices are not available. Quoted prices for similar assets are also not available for these investment securities. In order to determine the fair value of these securities, the Company engages a third party to estimate the future cash flows and discount rate using third party quotes adjusted based on assumptions a market participant would assume necessary for each specific security. As a result of the lack of an active market, the resulting fair values have been categorized as Level 3 in the fair value hierarchy.

Restricted stock

WAB is a member of the Federal Reserve System and the FHLB and, accordingly, maintains investments in the capital stock of the FRB and the FHLB. WAB also maintains an investment in its primary correspondent bank. These investments are carried at cost since no ready market exists for them, and they have no quoted market value. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists. The fair values of these investments have been categorized as Level 2 in the fair value hierarchy.

Loans

The fair value of loans is estimated based on discounted cash flows using interest rates currently being offered for loans with similar terms to borrowers with similar credit quality and adjustments that the Company believes a market participant would consider in determining fair value based on a third party independent valuation. As a result, the fair value for certain loans is categorized as Level 2 in the fair value hierarchy, excluding impaired loans which are categorized as Level 3.

Accrued interest receivable and payable

The carrying amounts reported in the Consolidated Balance Sheets for accrued interest receivable and payable approximate their fair value.

Derivative financial instruments

All derivatives are recognized in the Consolidated Balance Sheets at their fair value. The fair value for derivatives is determined based on market prices, broker-dealer quotations on similar products, or other related input parameters. As a result, the fair values have been categorized as Level 2 in the fair value hierarchy.

Deposits

The fair value disclosed for demand and savings deposits is by definition equal to the amount payable on demand at their reporting date (that is, their carrying amount), which the Company believes a market participant would consider in determining fair value. The carrying amount for variable-rate deposit accounts approximates their fair value. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on these deposits. The fair value measurement of the deposit liabilities is categorized as Level 2 in the fair value hierarchy.

FHLB advances and other borrowed funds

The fair values of the Company’s borrowings are estimated using discounted cash flow analyses, based on the market rates for similar types of borrowing arrangements. The FHLB advances have been categorized as Level 2 in the fair value hierarchy due to their short durations. Other borrowings have been categorized as Level 3 in the fair value hierarchy.

Subordinated debt

The fair value of subordinated debt is based on the market rate for the respective subordinated debt security. Subordinated debt has been categorized as Level 3 in the fair value hierarchy.

Junior subordinated debt

Junior subordinated debt is valued based on a discounted cash flow model which uses as inputs Treasury Bond rates and the 'BB' rated financial index. Junior subordinated debt has been categorized as Level 3 in the fair value hierarchy.

Off-balance sheet instruments

The fair value of the Company’s off-balance sheet instruments (lending commitments and standby letters of credit) is based on quoted fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements, and the counterparties’ credit standing.

Recent Accounting Pronouncements

Recent accounting pronouncements

In June 2014, the FASB issued guidance within ASU 2014-12, Accounting for Share-Based Payments When the Terms of anAward Provide That a Performance Target Could Be Achieved after the Requisite Service Period. The amendments in ASU 2014-12 to Topic 718, Compensation - Stock Compensation, provide explicit guidance on whether to treat a performance target that could be achieved after the requisite service period as a performance condition that affects vesting or as a nonvesting condition that affects the grant-date fair value of an award. The amendments are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. An entity may elect to apply the amendments either prospectively to all awards granted or modified after the effective date or retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.

In August 2014, the FASB issued guidance within ASU 2014-15, Presentation of Financial Statements - Going Concern. The amendments in ASU 2014-15 to Subtopic 205-40, Going Concern, provide guidance about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern. The amendments require management to assess an entity's ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. The amendments are effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Early application is permitted. The adoption of this guidance is not expected to have a material impact on the Company’s Consolidated Financial Statements.

In February 2015, the FASB issued guidance within ASU 2015-02, Amendments to the Consolidation Analysis. The amendments in ASU 2015-02 to Topic 810, Consolidation, change the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. Specifically, the amendments modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminate the presumption that a general partner should consolidate a limited partnership, affect the consolidation analysis of reporting entities that are involved with variable interest entities, particularly those that have fee arrangements and related party relationships, and provide a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements that are similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. The amendments are effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. An entity may apply the amendments in this Update using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption or, may apply the amendments retrospectively. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.

In November 2015, the FASB issued guidance within ASU 2015-17, Income Taxes. The amendments in ASU 2015-17 to Topic 740, Income Taxes, changes the presentation of deferred income tax liabilities and assets, from previously bifurcated current and noncurrent, to a single noncurrent amount on the classified statement of financial position. The amendment is effective from the annual period ending after December 15, 2016, and for and interim periods within those annual periods. Early application is permitted. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In January 2016, the FASB issued guidance within ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in ASU 2016-01 to Subtopic 825-10, Financial Instruments, contain the following elements: 1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; 2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) eliminates the requirement for public entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; 4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 5) requires an entity to present separately in OCI the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; 6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or accompanying notes to the financial statements; 7) clarifies that the entity should evaluate the need for a valuation allowance on a deferred tax asset related to AFS securities in combination with the entity's other deferred tax assets. The amendments are effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. Except for the early application of the amendment noted in item 5) above (which the Company elected to early adopt effective January 1, 2015 as discussed in the Company's Annual Report on Form 10-K for the year ended December 31, 2015), early adoption of the amendments in this Update is not permitted. The adoption of the other amendments in this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In February 2016, the FASB issued guidance within ASU 2016-02, Leases. The amendments in ASU 2016-02 to Topic 842, Leases, require lessees to recognize the lease assets and lease liabilities arising from operating leases in the statement of financial position. The accounting applied by a lessor is largely unchanged from that applied under previous GAAP. The amendments in this Update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. Management is in the process of evaluating the effects that the standard is expected to have on the Company's Consolidated Financial Statements and related disclosures.

In March 2016, the FASB issued guidance within ASU 2016-05, Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships. The amendments in ASU 2016-05 to Topic 815, Derivatives and Hedging, clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. An entity has the option to apply the amendments in this Update on either a prospective basis or a modified retrospective basis. The amendments in this Update are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

In March 2016, the FASB issued guidance within ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. The amendments in ASU 2016-09 to Topic 718, Compensation - Stock Compensation, require recognition of all excess tax benefits and tax deficiencies through income tax expense or benefit in the income statement. Other amendments in this ASU include guidance on the classification of share-based payment transactions in the statement of cash flows and an option to account for forfeitures of share-based awards as they occur rather than estimating the compensation cost based on the number of awards that are expected to vest. The amendments in this Update are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any interim or annual period. Effective January 1, 2016, the Company elected early adoption of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. As a result of adoption, the Company recognized a $3.9 million tax benefit as a reduction of income tax expense. The Company has elected to continue to estimate compensation cost based on the number of awards that are expected to vest. The adoption of this guidance did not have a significant impact on the Company's Consolidated Statement of Cash Flows.

In June 2016, the FASB issued guidance within ASU 2016-13, Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 to Topic 326, Financial Instruments - Credit Losses, require that an organization measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU also requires enhanced disclosures, including qualitative and quantitative disclosures that provide additional information about the amounts recorded in the financial statements. Additionally, the ASU amends the accounting for credit losses on AFS debt securities and purchased financial assets with credit deterioration. The amendments in this Update are effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Management is in the process of evaluating the effects that the standard is expected to have on the Company's Consolidated Financial Statements and related disclosures.

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Investment Securities (Tables)

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Carrying Amounts and Fair Values of Investment Securities

The carrying amounts and fair values of investment securities at June 30, 2016 and December 31, 2015 are summarized as follows: 

	June 30, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
	(in thousands)
Held-to-maturity
Tax-exempt bonds	$	36,929	$	4,233	$	—		$	41,162
Available-for-sale
Collateralized debt obligations	$	50	$	10,133	$	—		$	10,183
Commercial MBS issued by GSEs	43,432		1,066		—			44,498
Corporate debt securities	7,765		597		—			8,362
CRA investments	34,984		399		—			35,383
Municipal obligations	326,306		20,455		—			346,761
Preferred stock	104,581		5,563		(868		)	109,276
Private label commercial MBS	3,728		—		(7		)	3,721
Private label residential MBS	337,891		3,072		(1,608		)	339,355
Residential MBS issued by GSEs	1,184,185		23,603		(43		)	1,207,745
Trust preferred securities	32,000		—		(8,299		)	23,701
U.S. government sponsored agency securities	34,000		3		—			34,003
U.S. treasury securities	2,496		55		—			2,551
Total AFS securities	$	2,111,418	$	64,946	$	(10,825	)	$	2,165,539
Securities measured at fair value
Residential MBS issued by GSEs								$	1,326

	December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	50	$	10,059	$	(49	)	$	10,060
Commercial MBS issued by GSEs	19,147		72		(105		)	19,114
Corporate debt securities	12,769		482		—			13,251
CRA investments	34,722		—		(37		)	34,685
Municipal obligations	320,087		14,743		—			334,830
Preferred stock	108,417		4,286		(1,467		)	111,236
Private label commercial MBS	4,685		6		—			4,691
Private label residential MBS	261,530		5		(4,407		)	257,128
Residential MBS issued by GSEs	1,169,631		5,254		(4,664		)	1,170,221
Trust preferred securities	32,000		—		(7,686		)	24,314
U.S. treasury securities	2,996		—		(3		)	2,993
Total AFS securities	$	1,966,034	$	34,907	$	(18,418	)	$	1,982,523
Securities measured at fair value
Residential MBS issued by GSEs								$	1,481

Unrealized Losses and Fair Value of Investment Securities in Continuous Unrealized Loss Position

Information pertaining to securities with gross unrealized losses at June 30, 2016 and December 31, 2015, aggregated by investment category and length of time that individual securities have been in a continuous loss position follows:

	June 30, 2016
	Less Than Twelve Months				More Than Twelve Months				Total
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale
Preferred stock	$	182	$	10,729	$	686	$	8,680	$	868	$	19,409
Private label commercial MBS	7		3,721		—		—		7		3,721
Private label residential MBS	965		99,654		643		30,653		1,608		130,307
Residential MBS issued by GSEs	15		21,009		28		14,334		43		35,343
Trust preferred securities	—		—		8,299		23,701		8,299		23,701
Total AFS securities	$	1,169	$	135,113	$	9,656	$	77,368	$	10,825	$	212,481

	December 31, 2015
	Less Than Twelve Months				More Than Twelve Months				Total
	Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	49	$	1	$	—	$	—	$	49	$	1
Commercial MBS issued by GSEs	105		17,051		—		—		105		17,051
CRA investments	37		24,729		—		—		37		24,729
Preferred stock	377		10,542		1,090		14,761		1,467		25,303
Private label residential MBS	3,733		226,720		674		30,372		4,407		257,092
Residential MBS issued by GSEs	3,566		536,515		1,098		38,338		4,664		574,853
Trust preferred securities	—		—		7,686		24,314		7,686		24,314
U.S. treasury securities	3		2,006		—		—		3		2,006
Total AFS securities	$	7,870	$	817,564	$	10,548	$	107,785	$	18,418	$	925,349

Amortized Cost and Fair Value of Investment Securities by Contractual Maturities

The table below shows the amortized cost and fair value of securities as of June 30, 2016, by contractual maturities. MBS are shown separately as individual MBS are comprised of pools of loans with varying maturities. Therefore, these securities are listed separately in the maturity summary. 

	June 30, 2016
	Amortized Cost		Estimated Fair Value
	(in thousands)
Held-to-maturity
After five years through ten years	$	15,445	$	17,187
After ten years	21,484		23,975
Total HTM securities	$	36,929	$	41,162
Available-for-sale
Due in one year or less	$	55,422	$	56,134
After one year through five years	73,571		77,406
After five years through ten years	89,966		93,725
After ten years	323,223		342,955
Mortgage-backed securities	1,569,236		1,595,319
Total AFS securities	$	2,111,418	$	2,165,539

Investment Securities by Credit Rating Type

The following tables summarize the carrying amount of the Company’s investment ratings position as of June 30, 2016 and December 31, 2015: 

	June 30, 2016
	AAA		Split-rated AAA/AA+		AA+ to AA-		A+ to A-		BBB+ to BBB-		BB+ and below		Unrated		Totals
	(in thousands)
Held-to-maturity
Tax-exempt bonds	$	15,445	$	—	$	—	$	—	$	—	$	—	$	21,484	$	36,929
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	—	$	—	$	—	$	10,183	$	—	$	10,183
Commercial MBS issued by GSEs	—		27,050		—		—		—		—		17,448		44,498
Corporate debt securities	—		—		2,701		5,661		—		—		—		8,362
CRA investments	—		—		—		—		—		—		35,383		35,383
Municipal obligations	7,853		—		200,699		131,929		6,109		170		1		346,761
Preferred stock	—		—		—		—		71,814		19,330		18,132		109,276
Private label commercial MBS	3,721		—		—		—		—		—		—		3,721
Private label residential MBS	275,956		—		34,733		2,625		1,243		2,858		21,940		339,355
Residential MBS issued by GSEs	—		1,207,745		—		—		—		—		—		1,207,745
Trust preferred securities	—		—		—		—		23,701		—		—		23,701
U.S. government sponsored agency securities	—		34,003		—		—		—		—		—		34,003
U.S. treasury securities	—		2,551		—		—		—		—		—		2,551
Total AFS securities (1)	$	287,530	$	1,271,349	$	238,133	$	140,215	$	102,867	$	32,541	$	92,904	$	2,165,539
Securities measured at fair value
Residential MBS issued by GSEs	$	—	$	1,326	$	—	$	—	$	—	$	—	$	—	$	1,326

(1) Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch.

	December 31, 2015
	AAA		Split-rated AAA/AA+		AA+ to AA-		A+ to A-		BBB+ to BBB-		BB+ and below		Unrated		Totals
	(in thousands)
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	—	$	—	$	—	$	10,060	$	—	$	10,060
Commercial MBS issued by GSEs	—		19,114		—		—		—		—		—		19,114
Corporate debt securities	—		—		2,721		5,489		5,041		—		—		13,251
CRA investments	—		—		—		—		—		—		34,685		34,685
Municipal obligations	7,949		—		180,460		131,110		6,243		180		8,888		334,830
Preferred stock	—		—		—		—		79,955		23,655		7,626		111,236
Private label commercial MBS	4,691		—		—		—		—		—		—		4,691
Private label residential MBS	235,605		—		40		3,186		1,750		2,705		13,842		257,128
Residential MBS issued by GSEs	—		1,170,221		—		—		—		—		—		1,170,221
Trust preferred securities	—		—		—		—		24,314		—		—		24,314
U.S. treasury securities	—		2,993		—		—		—		—		—		2,993
Total AFS securities (1)	$	248,245	$	1,192,328	$	183,221	$	139,785	$	117,303	$	36,600	$	65,041	$	1,982,523
Securities measured at fair value
Residential MBS issued by GSEs	$	—	$	1,481	$	—	$	—	$	—	$	—	$	—	$	1,481

(1) Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch.

Gross Gains and (Losses) on Sales of Investment Securities

The following table presents gross gains and losses on sales of investment securities: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016			2015
Gross gains	$	—	$	55	$	2,057		$	1,103
Gross losses	—		—		(1,056		)	(459		)
Net gains on sales of investment securities	$	—	$	55	$	1,001		$	644

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Loans, Leases and Allowance for Credit Losses (Tables)

6 Months Ended

Jun. 30, 2016

Receivables [Abstract]

Schedule of Held for Investment Loan Portfolio Composition of Loans, Leases and Allowance for Credit Losses

The composition of the Company’s held for investment loan portfolio is as follows: 

	June 30, 2016			December 31, 2015
	(in thousands)
Commercial and industrial	$	5,454,939		$	5,114,257
Commercial real estate - non-owner occupied	3,601,331			2,283,536
Commercial real estate - owner occupied	2,008,261			2,083,285
Construction and land development	1,333,537			1,133,439
Residential real estate	293,020			322,939
Commercial leases	122,668			148,493
Consumer	41,755			26,905
Loans, net of deferred loan fees and costs	12,855,511			11,112,854
Allowance for credit losses	(122,104		)	(119,068		)
Total loans HFI	$	12,733,407		$	10,993,786

Contractual Aging of Loan Portfolio by Class of Loans Including Loans Held for Sale and Excluding Deferred Fees/Costs

The following table presents the contractual aging of the recorded investment in past due loans held for investment by class of loans:

	June 30, 2016
	Current		30-59 Days Past Due		60-89 Days Past Due		Over 90 days Past Due		Total Past Due		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,002,907	$	130	$	—	$	5,224	$	5,354	$	2,008,261
Non-owner occupied	3,408,792		1,610		—		—		1,610		3,410,402
Multi-family	190,929		—		—		—		—		190,929
Commercial and industrial
Commercial	5,441,453		150		1,598		11,738		13,486		5,454,939
Leases	122,560		70		38		—		108		122,668
Construction and land development
Construction	850,558		—		—		—		—		850,558
Land	481,695		—		—		1,284		1,284		482,979
Residential real estate	288,640		205		641		3,534		4,380		293,020
Consumer	41,573		4		15		163		182		41,755
Total loans	$	12,829,107	$	2,169	$	2,292	$	21,943	$	26,404	$	12,855,511

	December 31, 2015
	Current		30-59 Days Past Due		60-89 Days Past Due		Over 90 days Past Due		Total Past Due		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,078,968	$	445	$	362	$	3,510	$	4,317	$	2,083,285
Non-owner occupied	2,099,274		2,481		—		2,822		5,303		2,104,577
Multi-family	178,959		—		—		—		—		178,959
Commercial and industrial
Commercial	5,066,197		26,358		14,124		7,578		48,060		5,114,257
Leases	145,905		—		—		2,588		2,588		148,493
Construction and land development
Construction	694,527		—		—		—		—		694,527
Land	438,495		—		—		417		417		438,912
Residential real estate	317,677		888		159		4,215		5,262		322,939
Consumer	26,587		12		91		215		318		26,905
Total loans	$	11,046,589	$	30,184	$	14,736	$	21,345	$	66,265	$	11,112,854

Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due 90 Days Still Accruing Interest by Loan Class

The following table presents the recorded investment in non-accrual loans and loans past due ninety days or more and still accruing interest by class of loans: 

	June 30, 2016								December 31, 2015
	Non-accrual loans						Loans past due 90 days or more and still accruing		Non-accrual loans						Loans past due 90 days or more and still accruing
	Current		Past Due/ Delinquent		Total Non-accrual				Current		Past Due/ Delinquent		Total Non-accrual
	(in thousands)
Commercial real estate
Owner occupied	$	1,069	$	1,698	$	2,767	$	3,526	$	749	$	3,253	$	4,002	$	339
Non-owner occupied	8,129		—		8,129		—		11,851		2,822		14,673		—
Multi-family	—		—		—		—		—		—		—		—
Commercial and industrial
Commercial	13,032		9,380		22,412		3,461		3,263		15,026		18,289		2,671
Leases	—		—		—		—		—		2,588		2,588		—
Construction and land development
Construction	—		—		—		—		—		—		—		—
Land	—		1,284		1,284		—		1,892		417		2,309		—
Residential real estate	1,400		3,534		4,934		4		1,835		4,489		6,324		—
Consumer	—		159		159		—		—		196		196		18
Total	$	23,630	$	16,055	$	39,685	$	6,991	$	19,590	$	28,791	$	48,381	$	3,028

Loans by Risk Rating

The following tables present HFI loans by risk rating: 

	June 30, 2016
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Commercial real estate
Owner occupied	$	1,965,474	$	28,077	$	12,787	$	1,923	$	—	$	2,008,261
Non-owner occupied	3,316,897		44,045		49,460		—		—		3,410,402
Multi-family	190,929		—		—		—		—		190,929
Commercial and industrial
Commercial	5,330,572		72,170		52,197		—		—		5,454,939
Leases	122,136		201		331		—		—		122,668
Construction and land development
Construction	825,983		8,420		16,155		—		—		850,558
Land	469,291		499		13,189		—		—		482,979
Residential real estate	282,079		349		10,592		—		—		293,020
Consumer	41,392		62		301		—		—		41,755
Total	$	12,544,753	$	153,823	$	155,012	$	1,923	$	—	$	12,855,511

	June 30, 2016
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Current (up to 29 days past due)	$	12,542,844	$	150,510	$	133,830	$	1,923	$	—	$	12,829,107
Past due 30 - 59 days	1,894		129		146		—		—		2,169
Past due 60 - 89 days	—		229		2,063		—		—		2,292
Past due 90 days or more	15		2,955		18,973		—		—		21,943
Total	$	12,544,753	$	153,823	$	155,012	$	1,923	$	—	$	12,855,511

	December 31, 2015
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Commercial real estate
Owner occupied	$	2,032,932	$	28,422	$	20,814	$	1,117	$	—	$	2,083,285
Non-owner occupied	2,054,428		14,867		35,282		—		—		2,104,577
Multi-family	178,959		—		—		—		—		178,959
Commercial and industrial
Commercial	4,962,930		76,283		74,294		750		—		5,114,257
Leases	140,531		4,580		794		2,588		—		148,493
Construction and land development
Construction	678,438		16,089		—		—		—		694,527
Land	420,819		362		17,731		—		—		438,912
Residential real estate	310,067		776		12,096		—		—		322,939
Consumer	26,438		209		258		—		—		26,905
Total	$	10,805,542	$	141,588	$	161,269	$	4,455	$	—	$	11,112,854

	December 31, 2015
	Pass		Special Mention		Substandard		Doubtful		Loss		Total
	(in thousands)
Current (up to 29 days past due)	$	10,799,558	$	140,932	$	104,232	$	1,867	$	—	$	11,046,589
Past due 30 - 59 days	1,907		271		28,006		—		—		30,184
Past due 60 - 89 days	4,077		385		10,274		—		—		14,736
Past due 90 days or more	—		—		18,757		2,588		—		21,345
Total	$	10,805,542	$	141,588	$	161,269	$	4,455	$	—	$	11,112,854

Recorded Investment in Loans Classified as Impaired

The table below reflects the recorded investment in loans classified as impaired: 

	June 30, 2016			December 31, 2015
	(in thousands)
Impaired loans with a specific valuation allowance under ASC 310 (1)	$	20,695		$	24,287
Impaired loans without a specific valuation allowance under ASC 310 (2)	95,771			104,587
Total impaired loans	$	116,466		$	128,874
Valuation allowance related to impaired loans (3)	$	(6,395	)	$	(4,658	)

(1) Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

(2) Includes TDR loans of $68.6 million and $85.9 million at June 30, 2016 and December 31, 2015, respectively.

(3) Includes valuation allowance related to TDR loans of $0.2 million and $0.3 million at June 30, 2016 and December 31, 2015, respectively.

The following table presents the average investment in impaired loans and income recognized on impaired loans: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Average balance on impaired loans	$	109,833	$	155,943	$	116,173	$	159,186
Interest income recognized on impaired loans, accrual basis	1,050		1,126		2,163		2,310
Interest recognized on non-accrual loans, cash basis	225		548		397		1,201

Impaired Loans by Loan Class

The following table presents impaired loans by class: 

	June 30, 2016		December 31, 2015
	(in thousands)
Commercial real estate
Owner occupied	$	18,142	$	23,153
Non-owner occupied	32,485		41,081
Multi-family	—		—
Commercial and industrial
Commercial	32,042		26,513
Leases	332		2,896
Construction and land development
Construction	4		—
Land	17,531		18,322
Residential real estate	15,667		16,575
Consumer	263		334
Total	$	116,466	$	128,874

Average Investment in Impaired Loans by Loan Class

The following table presents average investment in impaired loans by loan class: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Commercial real estate
Owner occupied	$	19,075	$	38,750	$	20,406	$	40,839
Non-owner occupied	31,894		59,873		32,463		62,636
Multi-family	—		—		—		—
Commercial and industrial
Commercial	24,299		12,401		28,001		12,835
Leases	333		4,879		1,191		2,618
Construction and land development
Construction	—		—		—		—
Land	18,299		19,834		18,099		20,523
Residential real estate	15,635		19,838		15,700		19,375
Consumer	298		368		313		360
Total	$	109,833	$	155,943	$	116,173	$	159,186

Interest Income on Impaired Loans by Loan Class

The following table presents interest income on impaired loans by class: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Commercial real estate
Owner occupied	$	247	$	406	$	542	$	827
Non-owner occupied	313		360		651		690
Multi-family	—		—		—		—
Commercial and industrial
Commercial	121		60		229		139
Leases	4		—		36		—
Construction and land development
Construction	—		—		—		—
Land	239		197		446		392
Residential real estate	125		102		256		259
Consumer	1		1		3		3
Total	$	1,050	$	1,126	$	2,163	$	2,310

Tabular Disclosure of Nonperforming Assets

The following table summarizes nonperforming assets: 

	June 30, 2016		December 31, 2015
	(in thousands)
Non-accrual loans (1)	$	39,685	$	48,381
Loans past due 90 days or more on accrual status (2)	6,991		3,028
Accruing troubled debt restructured loans	65,008		70,707
Total nonperforming loans	111,684		122,116
Other assets acquired through foreclosure, net	49,842		43,942
Total nonperforming assets	$	161,526	$	166,058

(1) Includes non-accrual TDR loans of $4.2 million and $18.2 million at June 30, 2016 and December 31, 2015, respectively.

Schedule of Contractually Required Principal Payments, Cash Flows Expected to be Collected and Estimated Fair Value of Loans Acquired

The following table presents information regarding the contractually required principal payments receivable, cash flows expected to be collected, and the preliminary estimated fair value of loans acquired in the GE asset purchase as of April 20, 2016, the closing date of the transaction. See Note 15. Mergers and Acquisitions of these Notes to Unaudited Consolidated Financial Statements for additional details related to the purchase.

	April 20, 2016
	Commercial Real Estate		Construction and Land Development		Total
	(in thousands)
Contractually required principal and interest payments:
PCI	$	143,734	$	16,088	$	159,822
Non-PCI	1,579,064		103,914		1,682,978
Total loans acquired	$	1,722,798	$	120,002	$	1,842,800
Cash flows expected to be collected:
PCI	$	107,865	$	11,754	$	119,619
Non-PCI	1,315,523		80,955		1,396,478
Total loans acquired	$	1,423,388	$	92,709	$	1,516,097
Fair value of loans acquired:
PCI	$	85,329	$	7,938	$	93,267
Non-PCI	1,122,419		65,311		1,187,730
Total loans acquired	$	1,207,748	$	73,249	$	1,280,997

Accretable Yield Table

Changes in the accretable yield for loans acquired with deteriorated credit quality are as follows: 

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Balance, at beginning of period	$	13,541		$	17,956		$	15,925		$	19,156
Additions due to acquisition	4,301			857			4,301			857
Reclassifications from non-accretable to accretable yield (1)	—			265			—			695
Accretion to interest income	(887		)	(1,012		)	(1,669		)	(2,090		)
Reversal of fair value adjustments upon disposition of loans	(1,092		)	(876		)	(2,694		)	(1,428		)
Balance, at end of period	$	15,863		$	17,190		$	15,863		$	17,190

(1) The primary drivers of reclassification from non-accretable to accretable yield resulted from changes in estimated cash flows.

Allowances for Credit Losses

The following table presents impairment method information related to loans and allowance for credit losses by loan portfolio segment: 

	Commercial Real Estate-Owner Occupied		Commercial Real Estate-Non-Owner Occupied		Commercial and Industrial		Residential Real Estate		Construction and Land Development		Commercial Leases		Consumer		Total Loans
	(in thousands)
Loans as of June 30, 2016:
Recorded Investment:
Impaired loans with an allowance recorded	$	777	$	5,331	$	13,857	$	711	$	—	$	—	$	19	$	20,695
Impaired loans with no allowance recorded	17,365		27,154		18,185		14,956		17,535		332		244		95,771
Total loans individually evaluated for impairment	18,142		32,485		32,042		15,667		17,535		332		263		116,466
Loans collectively evaluated for impairment	1,976,526		3,439,886		5,421,189		274,548		1,297,386		122,336		41,492		12,573,363
Loans acquired with deteriorated credit quality	13,593		128,960		1,708		2,805		18,616		—		—		165,682
Total recorded investment	$	2,008,261	$	3,601,331	$	5,454,939	$	293,020	$	1,333,537	$	122,668	$	41,755	$	12,855,511
Unpaid Principal Balance
Impaired loans with an allowance recorded	$	777	$	5,331	$	14,109	$	766	$	—	$	—	$	19	$	21,002
Impaired loans with no allowance recorded	60,891		53,045		89,584		42,458		84,600		484		3,968		335,030
Total loans individually evaluated for impairment	61,668		58,376		103,693		43,224		84,600		484		3,987		356,032
Loans collectively evaluated for impairment	1,976,526		3,439,886		5,421,189		274,548		1,297,386		122,336		41,492		12,573,363
Loans acquired with deteriorated credit quality	17,878		163,683		8,834		3,326		20,055		—		—		213,776
Total unpaid principal balance	$	2,056,072	$	3,661,945	$	5,533,716	$	321,098	$	1,402,041	$	122,820	$	45,479	$	13,143,171
Related Allowance for Credit Losses
Impaired loans with an allowance recorded	$	777	$	430	$	5,060	$	127	$	—	$	—	$	1	$	6,395
Impaired loans with no allowance recorded	—		—		—		—		—		—		—		—
Total loans individually evaluated for impairment	777		430		5,060		127		—		—		1		6,395
Loans collectively evaluated for impairment	11,225		12,387		63,885		4,419		21,386		1,260		757		115,319
Loans acquired with deteriorated credit quality	—		48		342		—		—		—		—		390
Total allowance for credit losses	$	12,002	$	12,865	$	69,287	$	4,546	$	21,386	$	1,260	$	758	$	122,104

	Commercial Real Estate-Owner Occupied		Commercial Real Estate-Non-Owner Occupied		Commercial and Industrial		Residential Real Estate		Construction and Land Development		Commercial Leases		Consumer		Total Loans
	(in thousands)
Loans as of December 31, 2015:
Recorded Investment:
Impaired loans with an allowance recorded	$	2,778	$	2,344	$	18,230	$	914	$	—	$	—	$	21	$	24,287
Impaired loans with no allowance recorded	20,375		38,737		8,283		15,661		18,322		2,896		313		104,587
Total loans individually evaluated for impairment	23,153		41,081		26,513		16,575		18,322		2,896		334		128,874
Loans collectively evaluated for impairment	2,044,934		2,180,250		5,085,299		303,372		1,115,117		145,597		26,571		10,901,140
Loans acquired with deteriorated credit quality	15,198		62,205		2,445		2,992		—		—		—		82,840
Total recorded investment	$	2,083,285	$	2,283,536	$	5,114,257	$	322,939	$	1,133,439	$	148,493	$	26,905	$	11,112,854
Unpaid Principal Balance
Impaired loans with an allowance recorded	$	2,778	$	2,344	$	19,233	$	969	$	—	$	—	$	21	$	25,345
Impaired loans with no allowance recorded	63,709		61,692		71,773		44,142		82,800		5,229		3,923		333,268
Total loans individually evaluated for impairment	66,487		64,036		91,006		45,111		82,800		5,229		3,944		358,613
Loans collectively evaluated for impairment	2,044,934		2,180,250		5,085,299		303,372		1,115,117		145,597		26,571		10,901,140
Loans acquired with deteriorated credit quality	20,227		88,181		7,820		3,536		—		—		—		119,764
Total unpaid principal balance	$	2,131,648	$	2,332,467	$	5,184,125	$	352,019	$	1,197,917	$	150,826	$	30,515	$	11,379,517
Related Allowance for Credit Losses
Impaired loans with an allowance recorded	$	858	$	11	$	3,518	$	270	$	—	$	—	$	1	$	4,658
Impaired loans with no allowance recorded	—		—		—		—		—		—		—		—
Total loans individually evaluated for impairment	858		11		3,518		270		—		—		1		4,658
Loans collectively evaluated for impairment	10,953		11,302		65,806		5,008		18,976		1,857		472		114,374
Loans acquired with deteriorated credit quality	—		36		—		—		—		—		—		36
Total allowance for credit losses	$	11,811	$	11,349	$	69,324	$	5,278	$	18,976	$	1,857	$	473	$	119,068

The following table summarizes the changes in the allowance for credit losses by portfolio type: 

	Three Months Ended June 30,
	Construction and Land Development			Commercial Real Estate			Residential Real Estate			Commercial and Industrial			Consumer			Total
	(in thousands)
2016
Beginning Balance	$	19,425		$	23,104		$	4,938		$	71,156		$	604		$	119,227
Charge-offs	—			244			—			1,161			46			1,451
Recoveries	(58		)	(770		)	(153		)	(804		)	(43		)	(1,828		)
Provision	1,903			1,237			(545		)	(252		)	157			2,500
Ending balance	$	21,386		$	24,867		$	4,546		$	70,547		$	758		$	122,104
2015
Beginning Balance	$	17,999		$	28,111		$	6,666		$	58,651		$	671		$	112,098
Charge-offs	—			—			218			1,771			53			2,042
Recoveries	(1,373		)	(1,738		)	(1,184		)	(681		)	(24		)	(5,000		)
Provision	165			(903		)	(1,233		)	2,028			(57		)	—
Ending balance	$	19,537		$	28,946		$	6,399		$	59,589		$	585		$	115,056

	Six Months Ended June 30,
	Construction and Land Development			Commercial Real Estate			Residential Real Estate			Commercial and Industrial			Consumer			Total
	(in thousands)
2016
Beginning Balance	$	18,976		$	23,160		$	5,278		$	71,181		$	473		$	119,068
Charge-offs	—			654			26			8,652			120			9,452
Recoveries	(153		)	(4,435		)	(410		)	(2,380		)	(110		)	(7,488		)
Provision	2,257			(2,074		)	(1,116		)	5,638			295			5,000
Ending balance	$	21,386		$	24,867		$	4,546		$	70,547		$	758		$	122,104
2015
Beginning Balance	$	18,558		$	28,783		$	7,456		$	54,566		$	853		$	110,216
Charge-offs	—			—			618			2,164			107			2,889
Recoveries	(1,530		)	(2,121		)	(1,717		)	(1,597		)	(64		)	(7,029		)
Provision	(551		)	(1,958		)	(2,156		)	5,590			(225		)	700
Ending balance	$	19,537		$	28,946		$	6,399		$	59,589		$	585		$	115,056

Troubled Debt Restructured Loans by Loan Class

The following table presents information on the financial effects of TDR loans by class for the three and six months endedJune 30, 2015:

	Three and Six Months Ended June 30, 2015
	Number of Loans	Pre-Modification Outstanding Recorded Investment		Forgiven Principal Balance		Lost Interest Income		Post-Modification Outstanding Recorded Investment		Waived Fees and Other Expenses
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	$	—	$	—	$	—	$	—
Non-owner occupied	—	—		—		—		—		—
Multi-family	—	—		—		—		—		—
Commercial and industrial
Commercial	1	256		—		—		256		—
Leases	—	—		—		—		—		—
Construction and land development
Construction	—	—		—		—		—		—
Land	—	—		—		—		—		—
Residential real estate	—	—		—		—		—		—
Consumer	—	—		—		—		—		—
Total	1	$	256	$	—	$	—	$	256	$	—

Troubled Debt Restructured Loans by Class for Which There was a Payment Default

The Company did not have any new TDR loans during the three and six months endedJune 30, 2016. The following table presents information on the financial effects of TDR loans by class for the three and six months endedJune 30, 2015:

	Three and Six Months Ended June 30, 2015
	Number of Loans	Pre-Modification Outstanding Recorded Investment		Forgiven Principal Balance		Lost Interest Income		Post-Modification Outstanding Recorded Investment		Waived Fees and Other Expenses
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	$	—	$	—	$	—	$	—
Non-owner occupied	—	—		—		—		—		—
Multi-family	—	—		—		—		—		—
Commercial and industrial
Commercial	1	256		—		—		256		—
Leases	—	—		—		—		—		—
Construction and land development
Construction	—	—		—		—		—		—
Land	—	—		—		—		—		—
Residential real estate	—	—		—		—		—		—
Consumer	—	—		—		—		—		—
Total	1	$	256	$	—	$	—	$	256	$	—

The following table presents TDR loans by class for which there was a payment default during the period: 

	Three Months Ended June 30,
	2016			2015
	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
	(dollars in thousands)
Commercial real estate
Owner occupied	—	$	—	—	$	—
Non-owner occupied	—	—		—	—
Multi-family	—	—		—	—
Commercial and industrial
Commercial	—	—		—	—
Leases	—	—		—	—
Construction and land development
Construction	—	—		—	—
Land	—	—		—	—
Residential real estate	1	333		1	202
Consumer	—	—		—	—
Total	1	$	333	1	$	202

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Other Assets Acquired Through Foreclosure (Tables)

6 Months Ended

Jun. 30, 2016

Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]

Changes in Other Assets Acquired Through Foreclosure

The following table represents the changes in other assets acquired through foreclosure: 

	Three Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	61,346		$	(8,570	)	$	52,776
Transfers to other assets acquired through foreclosure, net	88			—			88
Proceeds from sale of other real estate owned and repossessed assets, net	(4,480		)	1,813			(2,667		)
Valuation adjustments, net	—			134			134
Gains, net (1)	(489		)	—			(489		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	77,968		$	(14,209	)	$	63,759
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	5,739			—			5,739
Proceeds from sale of other real estate owned and repossessed assets, net	(15,415		)	2,480			(12,935		)
Valuation adjustments, net	—			(718		)	(718		)
Gains, net (1)	1,940			—			1,940
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(1) There were no net gains related to initial transfers to other assets during each of the three months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

	Six Months Ended June 30,
	2016
	Gross Balance			Valuation Allowance			Net Balance
	(in thousands)
Balance, beginning of period	$	52,984		$	(9,042	)	$	43,942
Transfers to other assets acquired through foreclosure, net	10,726			—			10,726
Proceeds from sale of other real estate owned and repossessed assets, net	(6,916		)	2,108			(4,808		)
Valuation adjustments, net	—			311			311
Gains, net (2)	(329		)	—			(329		)
Balance, end of period	$	56,465		$	(6,623	)	$	49,842
	2015
Balance, beginning of period	$	71,421		$	(14,271	)	$	57,150
Additions from acquisition	1,550			—			1,550
Transfers to other assets acquired through foreclosure, net	13,459			—			13,459
Proceeds from sale of other real estate owned and repossessed assets, net	(17,703		)	3,328			(14,375		)
Valuation adjustments, net	—			(1,504		)	(1,504		)
Gains, net (2)	3,055			—			3,055
Balance, end of period	$	71,782		$	(12,447	)	$	59,335

(2) Includes net gains related to initial transfers to other assets of zero and $0.6 million during the six months endedJune 30, 2016 and 2015, respectively, pursuant to accounting guidance.

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Other Borrowings (Tables)

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Company's Borrowings

The following table summarizes the Company’s borrowings as of June 30, 2016 and December 31, 2015: 

	June 30, 2016		December 31, 2015
	(in thousands)
Short-Term:
Federal funds purchased	$	—	$	—
FHLB advances	—		150,000
Total short-term borrowings	$	—	$	150,000

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Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2016

Equity [Abstract]

Summary of Changes in Accumulated Other Comprehensive Income

The following table summarizes the changes in accumulated other comprehensive income by component, net of tax, for the periods indicated: 

	Three Months Ended June 30,
	Unrealized holding gains (losses) on AFS			Unrealized holding gains (losses) on SERP		Unrealized holding gains (losses) on junior subordinated debt			Impairment loss on securities		Total
	(in thousands)
Balance, March 31, 2016	$	20,301		$	96	$	12,792		$	144	$	33,333
Other comprehensive income (loss) before reclassifications	12,712			6		575			—		13,293
Amounts reclassified from accumulated other comprehensive income	—			—		—			—		—
Net current-period other comprehensive income (loss)	12,712			6		575			—		13,293
Balance, June 30, 2016	$	33,013		$	102	$	13,367		$	144	$	46,626
Balance, March 31, 2015	$	23,279		$	—	$	16,115		$	144	$	39,538
SERP assumed in Bridge acquisition	—			337		—			—		337
Other comprehensive (loss) income before reclassifications	(8,378		)	—		(4,756		)	—		(13,134		)
Amounts reclassified from accumulated other comprehensive income	(34		)	—		—			—		(34		)
Net current-period other comprehensive (loss) income	(8,412		)	337		(4,756		)	—		(12,831		)
Balance, June 30, 2015	$	14,867		$	337	$	11,359		$	144	$	26,707

	Six Months Ended June 30,
	Unrealized holding gains (losses) on AFS			Unrealized holding gains (losses) on SERP		Unrealized holding gains (losses) on junior subordinated debt			Impairment loss on securities		Total
	(in thousands)
Balance, December 31, 2015	$	9,993		$	90	$	12,033		$	144	$	22,260
Other comprehensive income (loss) before reclassifications	23,731			12		1,334			—		25,077
Amounts reclassified from accumulated other comprehensive income	(711		)	—		—			—		(711		)
Net current-period other comprehensive income (loss)	23,020			12		1,334			—		24,366
Balance, June 30, 2016	$	33,013		$	102	$	13,367		$	144	$	46,626
Balance, January 1, 2015	$	16,495		$	—	$	16,309		$	144	$	32,948
SERP assumed in Bridge acquisition	—			337		—			—		337
Other comprehensive (loss) income before reclassifications	(1,225		)	—		(4,950		)	—		(6,175		)
Amounts reclassified from accumulated other comprehensive income	(403		)	—		—			—		(403		)
Net current-period other comprehensive (loss) income	(1,628		)	337		(4,950		)	—		(6,241		)
Balance, June 30, 2015	$	14,867		$	337	$	11,359		$	144	$	26,707

Schedule of Reclassifications Out of Accumulated Other Comprehensive Income

The following table presents reclassifications out of accumulated other comprehensive income: 

	Three Months Ended June 30,					Six Months Ended June 30,
Income Statement Classification	2016		2015			2016			2015
	(in thousands)
Gain (loss) on sales of investment securities, net	$	—	$	55		$	1,001		$	644
Income tax (expense) benefit	—		(21		)	(290		)	(241		)
Net of tax	$	—	$	34		$	711		$	403

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Derivatives and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position

The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in other assets or other liabilities in the Consolidated Balance Sheets, as indicated in the following table:

	June 30, 2016						December 31, 2015						June 30, 2015
			Fair Value						Fair Value						Fair Value
	Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities
	(in thousands)
Derivatives designated as hedging instruments:
Fair value hedges
Interest rate swaps	$	970,382	$	7,757	$	107,097	$	800,478	$	3,569	$	64,785	$	828,036	$	198	$	49,037
Total	970,382		7,757		107,097		800,478		3,569		64,785		828,036		198		49,037
Netting adjustments (1)	—		—		—		—		—		—		—		—		—
Net derivatives in the balance sheet	$	970,382	$	7,757	$	107,097	$	800,478	$	3,569	$	64,785	$	828,036	$	198	$	49,037

(1) Netting adjustments represent the amounts recorded to convert derivative balances from a gross basis to a net basis in accordance with the applicable accounting guidance.

Gain (Loss) on Derivative Instruments

The following table summarizes the gains (losses) on fair value hedges for the three and six months endedJune 30, 2016 and 2015, all of which are recorded in other non-interest income.

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Hedge of Fixed Rate Loans (1)
Loss on "pay fixed" swap	$	(18,115	)	$	24,003		$	(42,312	)	$	8,773
Gain on receive fixed rate loans	18,122			(23,988		)	42,319			(8,752		)
Net ineffectiveness	$	7		$	15		$	7		$	21
Hedge of Fixed Rate Subordinated Debt Issuances (1)
Gain on "receive fixed" swap	$	3,024		$	198		$	4,189		$	198
Loss on subordinated debt	(3,024		)	(198		)	(4,189		)	(198		)
Net ineffectiveness	$	—		$	—		$	—		$	—

(1) The fair value of derivatives contracts are carried as other assets and other liabilities in the Consolidated Balance Sheets. The effective portion of hedging gains (losses) is recorded as basis adjustments to the underlying hedged asset or liability. Gains and losses on both the hedging derivative and hedged item are recorded through non-interest income with a resulting net income impact for the amount of ineffectiveness.

Largest Exposure To Individual Counterparty

The following table summarizes the Company's largest exposure to an individual counterparty at the dates indicated for derivatives in net asset positions:

	June 30, 2016		December 31, 2015		June 30, 2015
	(in thousands)
Largest gross exposure (derivative asset) to an individual counterparty	$	7,556	$	3,569	$	198
Collateral posted by this counterparty	7,680		4,680		—
Derivative liability with this counterparty	—		—		—
Collateral pledged to this counterparty	—		1,340		—
Net exposure after netting adjustments and collateral	$	—	$	229	$	198

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Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table presents the calculation of basic and diluted EPS: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands, except per share amounts)
Weighted average shares - basic	102,688		88,177		102,294		88,059
Dilutive effect of stock awards	784		505		713		508
Weighted average shares - diluted	103,472		88,682		103,007		88,567
Net income available to common stockholders	$	61,614	$	39,228	$	122,946	$	79,435
Earnings per share - basic	0.60		0.44		1.20		0.90
Earnings per share - diluted	0.60		0.44		1.19		0.90

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Summary of Contractual Amounts for Unfunded Commitments and Letters of Credit

A summary of the contractual amounts for unfunded commitments and letters of credit are as follows: 

	June 30, 2016		December 31, 2015
	(in thousands)
Commitments to extend credit, including unsecured loan commitments of $353,644 at June 30, 2016 and $341,374 at December 31, 2015	$	3,895,885	$	3,624,578
Credit card commitments and financial guarantees	54,270		57,966
Standby letters of credit, including unsecured letters of credit of $10,380 at June 30, 2016 and $4,257 at December 31, 2015	53,448		50,659
Total	$	4,003,603	$	3,733,203

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Fair Value Accounting (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Gains and Losses from Fair Value Changes Included in Consolidated Statement of Operations

For the three and six months endedJune 30, 2016 and 2015 gains and losses from fair value changes were as follows:

	Changes in Fair Values for Items Measured at Fair Value Pursuant to Election of the Fair Value Option
	Unrealized Gain/(Loss) on Assets and Liabilities Measured at Fair Value, Net			Interest Income on Securities		Interest Expense on Junior Subordinated Debt		Total Changes Included in Current-Period Earnings			Total Changes Included in OCI, Net of Tax
	(in thousands)
Three Months Ended June 30, 2016
Securities measured at fair value	$	(1	)	$	—	$	—	$	(1	)	$	—
Junior subordinated debt	1,006			—		693		693			575
Total	$	1,005		$	—	$	693	$	692		$	575
Six Months Ended June 30, 2016
Securities measured at fair value	$	(6	)	$	—	$	—	$	(6	)	$	—
Junior subordinated debt	2,218			—		1,373		1,373			1,334
Total	$	2,212		$	—	$	1,373	$	1,367		$	1,334
Three Months Ended June 30, 2015
Securities measured at fair value	$	(9	)	$	1	$	—	$	(8	)	$	—
Junior subordinated debt	(7,736		)	—		451		451			(4,756		)
Total	$	(7,745	)	$	1	$	451	$	443		$	(4,756	)
Six Months Ended June 30, 2015
Securities measured at fair value	$	(14	)	$	1	$	—	$	(13	)	$	—
Junior subordinated debt	(8,045		)	—		892		892			(4,950		)
Total	$	(8,059	)	$	1	$	892	$	879		$	(4,950	)

Fair Value of Assets and Liabilities

The fair value of assets and liabilities measured at fair value on a recurring basis was determined using the following inputs as of the periods presented: 

	Fair Value Measurements at the End of the Reporting Period Using:
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(in thousands)
June 30, 2016
Assets:
Measured at fair value
Residential MBS issued by GSEs	$	—	$	1,326	$	—	$	1,326
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	10,183	$	10,183
Commercial MBS issued by GSEs	—		44,498		—		44,498
Corporate debt securities	—		8,362		—		8,362
CRA investments	35,383		—		—		35,383
Municipal obligations	—		346,761		—		346,761
Preferred stock	109,276		—		—		109,276
Private label commercial MBS	—		3,721		—		3,721
Private label residential MBS	—		339,355		—		339,355
Residential MBS issued by GSEs	—		1,207,745		—		1,207,745
Trust preferred securities	—		23,701		—		23,701
U.S. government sponsored agency securities	—		34,003		—		34,003
U.S. treasury securities	2,551		—		—		2,551
Total AFS securities	$	147,210	$	2,008,146	$	10,183	$	2,165,539
Loans - HFS	$	—	$	22,336	$	—	$	22,336
Derivative assets (1)	—		7,757		—		7,757
Liabilities:
Junior subordinated debt (2)	$	—	$	—	$	44,710	$	44,710
Derivative liabilities (1)	—		107,097		—		107,097

(1) Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a net positive value of $106,503 and the net carrying value of subordinated debt includes a net negative value of $7,757 as of June 30, 2016, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

(2) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

	Fair Value Measurements at the End of the Reporting Period Using:
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(in thousands)
December 31, 2015
Assets:
Measured at fair value
Residential MBS issued by GSEs	$	—	$	1,481	$	—	$	1,481
Available-for-sale
Collateralized debt obligations	$	—	$	—	$	10,060	$	10,060
Commercial MBS issued by GSEs	—		19,114		—		19,114
Corporate debt securities	—		13,251		—		13,251
CRA investments	34,685		—		—		34,685
Municipal obligations	—		334,830		—		334,830
Preferred stock	111,236		—		—		111,236
Private label commercial MBS	—		4,691		—		4,691
Private label residential MBS	—		257,128		—		257,128
Residential MBS issued by GSEs	—		1,170,221		—		1,170,221
Trust preferred securities	—		24,314		—		24,314
U.S. treasury securities	2,993		—		—		2,993
Total AFS securities	$	148,914	$	1,823,549	$	10,060	$	1,982,523
Loans - HFS	$	—	$	23,809	$	—	$	23,809
Derivative assets (1)	—		3,569		—		3,569
Liabilities:
Junior subordinated debt (2)	$	—	$	—	$	46,928	$	46,928
Derivative liabilities (1)	—		64,785		—		64,785

(1) Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a positive value of $64,184 and the net carrying value of subordinated debt includes a net negative value of $3,569 as of December 31, 2015, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

(2) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

Change in Level 3 Liabilities Measured at Fair Value on Recurring Basis

For the three and six months endedJune 30, 2016 and 2015, the change in Level 3 assets and liabilities measured at fair value on a recurring basis was as follows: 

	Junior Subordinated Debt
	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in thousands)
Beginning balance	$	(45,716	)	$	(40,746	)	$	(46,928	)	$	(40,437	)
Transfers into Level 3	—			—			—			—
Total gains (losses) for the period
Included in other comprehensive income (1)	1,006			(7,736		)	$	2,218		$	(8,045	)
Ending balance	$	(44,710	)	$	(48,482	)	$	(44,710	)	$	(48,482	)

(1)     Due to the Company's election to early adopt an element of ASU 2016-01, changes in the fair value of junior subordinated debt are presented as part

of OCI rather than earnings effective January 1, 2015. Accordingly, total losses are included in the other comprehensive income line, Unrealized gain (loss) on junior subordinated debt, which is net of tax. The above amount represents the gross loss from changes in fair value of junior subordinated debt.

	CDO Securities
	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands)
Beginning balance	$	9,076	$	10,520	$	10,060	$	11,445
Transfers into Level 3	—		—		—		—
Total gains (losses) for the period
Included in other comprehensive income (1)	1,107		284		123		(641		)
Ending balance	$	10,183	$	10,804	$	10,183	$	10,804

(1) Total gains (losses) for the period are included in the other comprehensive income line, Unrealized gain (loss) on AFS securities.

For Level 3 liabilities and assets measured at fair value on a recurring basis as of June 30, 2016 and December 31, 2015, the significant unobservable inputs used in the fair value measurements were as follows: 

	June 30, 2016		Valuation Technique	Significant Unobservable Inputs	Input Value
	(in thousands)
Junior subordinated debt	$	44,710	Discounted cash flow	Implied credit rating of the Company	6.16	%
CDO securities	10,183		S&P Model	Pricing indications from comparable securities

	December 31, 2015		Valuation Technique	Significant Unobservable Inputs	Input Value
	(in thousands)
Junior subordinated debt	$	46,928	Discounted cash flow	Adjusted Corporate Bond over Treasury Index with comparable credit spread	5.67	%
CDO securities	10,060		S&P Model	Pricing indications from comparable securities

Assets Measured at Fair Value on Nonrecurring Basis

The following table presents such assets carried on the balance sheet by caption and by level within the ASC 825 hierarchy:

	Fair Value Measurements at the End of the Reporting Period Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Active Markets for Similar Assets (Level 2)		Unobservable Inputs (Level 3)
	(in thousands)
As of June 30, 2016:
Impaired loans with specific valuation allowance	$	14,300	$	—	$	—	$	14,300
Impaired loans without specific valuation allowance (1)	61,869		—		—		61,869
Other assets acquired through foreclosure	49,842		—		—		49,842
As of December 31, 2015:
Impaired loans with specific valuation allowance	$	19,629	$	—	$	—	$	19,629
Impaired loans without specific valuation allowance (1)	66,754		—		—		66,754
Other assets acquired through foreclosure	43,942		—		—		43,942

(1) Excludes loan balances with charge-offs of $33.9 million and $37.8 million as of June 30, 2016 and December 31, 2015, respectively.

Estimated Fair Value of Financial Instruments

The estimated fair value of the Company’s financial instruments is as follows: 

	June 30, 2016
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Investment securities:
HTM	$	36,929	$	—	$	41,162	$	—	$	41,162
AFS	2,165,539		147,210		2,008,146		10,183		2,165,539
Trading	1,326		—		1,326		—		1,326
Derivative assets	7,757		—		7,757		—		7,757
Loans, net	12,755,743		—		12,536,447		76,169		12,612,616
Accrued interest receivable	60,432		—		60,432		—		60,432
Financial liabilities:
Deposits	$	14,201,357	$	—	$	14,205,415	$	—	$	14,205,415
Customer repurchases	38,492		—		38,492		—		38,492
Qualifying debt	382,103		—		—		372,447		372,447
Derivative liabilities	107,097		—		107,097		—		107,097
Accrued interest payable	14,368		—		14,368		—		14,368

	December 31, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Investment securities:
AFS	$	1,982,523	$	148,914	$	1,823,549	$	10,060	$	1,982,523
Trading	1,481		—		1,481		—		1,481
Derivative assets	3,569		—		3,569		—		3,569
Loans, net	11,017,595		—		10,766,826		86,383		10,853,209
Accrued interest receivable	54,445		—		54,445		—		54,445
Financial liabilities:
Deposits	$	12,030,624	$	—	$	12,034,199	$	—	$	12,034,199
Customer repurchases	38,155		—		38,155		—		38,155
FHLB advances	150,000		—		150,000		—		150,000
Qualifying debt	210,328		—		—		207,437		207,437
Derivative liabilities	64,785		—		64,785		—		64,785
Accrued interest payable	13,626		—		13,626		—		13,626

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Segments (Tables)

6 Months Ended

Jun. 30, 2016

Segment Reporting [Abstract]

Operating Segment Information

The following is a summary of selected operating segment information for the periods indicated:

				Regional Segments
Balance Sheet:	Consolidated Company			Arizona			Nevada			Southern California			Northern California
At June 30, 2016	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	2,958.8		$	2.4		$	9.7		$	2.0		$	1.9
Loans, net of deferred loan fees and costs	12,877.8			2,897.6			1,727.0			1,801.2			1,139.5
Less: allowance for credit losses	(122.1		)	(30.9		)	(19.9		)	(19.5		)	(8.4		)
Total loans	12,755.7			2,866.7			1,707.1			1,781.7			1,131.1
Other assets acquired through foreclosure, net	49.8			7.3			21.0			—			0.3
Goodwill and other intangible assets, net	304.3			—			24.2			—			157.5
Other assets	660.2			44.3			60.3			16.4			14.1
Total assets	$	16,728.8		$	2,920.7		$	1,822.3		$	1,800.1		$	1,304.9
Liabilities:
Deposits	$	14,201.4		$	3,801.4		$	3,623.0		$	2,404.0		$	1,510.9
Borrowings and qualifying debt	382.1			—			—			—			—
Other liabilities	349.1			11.7			28.6			9.3			9.8
Total liabilities	14,932.6			3,813.1			3,651.6			2,413.3			1,520.7
Allocated equity:	1,796.2			337.6			248.3			205.8			287.2
Total liabilities and stockholders' equity	$	16,728.8		$	4,150.7		$	3,899.9		$	2,619.1		$	1,807.9
Excess funds provided (used)	—			1,230.0			2,077.6			819.0			503.0

Income Statement:
Three Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	163,686		$	41,204		$	33,464		$	25,803		$	21,896
Provision for (recovery of) credit losses	2,500			1,703			(1,704		)	220			926
Net interest income (expense) after provision for credit losses	161,186			39,501			35,168			25,583			20,970
Non-interest income	8,559			888			2,097			561			2,516
Non-interest expense	(81,804		)	(14,550		)	(14,824		)	(10,635		)	(13,481		)
Income (loss) before income taxes	87,941			25,839			22,441			15,509			10,005
Income tax expense (benefit)	26,327			10,137			7,855			6,522			4,206
Net income	$	61,614		$	15,702		$	14,586		$	8,987		$	5,799

Six Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	309,397		$	79,660		$	66,039		$	50,231		$	45,091
Provision for (recovery of) credit losses	5,000			8,476			(2,517		)	250			1,968
Net interest income (expense) after provision for credit losses	304,397			71,184			68,556			49,981			43,123
Non-interest income	21,692			4,569			4,156			1,221			4,942
Non-interest expense	(157,297		)	(29,006		)	(29,570		)	(21,869		)	(27,448		)
Income (loss) before income taxes	168,792			46,747			43,142			29,333			20,617
Income tax expense (benefit)	45,846			18,339			15,100			12,335			8,669
Net income	$	122,946		$	28,408		$	28,042		$	16,998		$	11,948

	National Business Lines
Balance Sheet:	HOA Services			HFF			Public & Nonprofit Finance			Technology & Innovation			Other NBL			Corporate & Other
At June 30, 2016	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	—		$	—		$	—		$	—		$	—		$	2,942.8
Loans, net of deferred loan fees and costs	98.3			1,262.8			1,481.4			943.5			1,498.6			27.9
Less: allowance for credit losses	(1.1		)	(0.1		)	(16.1		)	(9.6		)	(16.2		)	(0.3		)
Total loans	97.2			1,262.7			1,465.3			933.9			1,482.4			27.6
Other assets acquired through foreclosure, net	—			—			—			—			—			21.2
Goodwill and other intangible assets, net	—			0.2			—			122.4			—			—
Other assets	0.3			20.0			14.1			3.7			11.3			475.7
Total assets	$	97.5		$	1,282.9		$	1,479.4		$	1,060.0		$	1,493.7		$	3,467.3
Liabilities:
Deposits	$	1,711.3		$	—		$	—		$	963.0		$	—		$	187.8
Borrowings and qualifying debt	—			—			—			—			—			382.1
Other liabilities	1.4			15.0			105.5			—			36.4			131.4
Total liabilities	1,712.7			15.0			105.5			963.0			36.4			701.3
Allocated equity:	43.6			104.9			89.3			217.4			124.1			138.0
Total liabilities and stockholders' equity	$	1,756.3		$	119.9		$	194.8		$	1,180.4		$	160.5		$	839.3
Excess funds provided (used)	1,658.8			(1,163.0		)	(1,284.6		)	120.4			(1,333.2		)	(2,628.0		)

Income Statement:
Three Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	9,909		$	12,068		$	5,026		$	16,631		$	12,523		$	(14,838	)
Provision for (recovery of) credit losses	10			—			175			(614		)	1,699			85
Net interest income (expense) after provision for credit losses	9,899			12,068			4,851			17,245			10,824			(14,923		)
Non-interest income	110			—			7			1,115			235			1,030
Non-interest expense	(5,820		)	(2,557		)	(1,929		)	(7,434		)	(3,598		)	(6,976		)
Income (loss) before income taxes	4,189			9,511			2,929			10,926			7,461			(20,869		)
Income tax expense (benefit)	1,571			3,567			1,098			4,097			2,798			(15,524		)
Net income	$	2,618		$	5,944		$	1,831		$	6,829		$	4,663		$	(5,345	)

Six Months Ended June 30, 2016:	(in thousands)
Net interest income (expense)	$	18,541		$	12,068		$	10,247		$	32,940		$	23,160		$	(28,580	)
Provision for (recovery of) credit losses	88			—			(194		)	(1,779		)	1,937			(3,229		)
Net interest income (expense) after provision for credit losses	18,453			12,068			10,441			34,719			21,223			(25,351		)
Non-interest income	215			—			3			2,752			870			2,964
Non-interest expense	(11,361		)	(2,557		)	(3,953		)	(14,340		)	(7,035		)	(10,158		)
Income (loss) before income taxes	7,307			9,511			6,491			23,131			15,058			(32,545		)
Income tax expense (benefit)	2,740			3,567			2,434			8,674			5,647			(31,659		)
Net income	$	4,567		$	5,944		$	4,057		$	14,457		$	9,411		$	(886	)

				Regional Segments
Balance Sheet:	Consolidated Company			Arizona			Nevada			Southern California			Northern California
At December 31, 2015	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	2,266.8		$	2.3		$	9.5		$	2.4		$	2.4
Loans, net of deferred loan fees and costs	11,136.7			2,811.7			1,737.2			1,761.9			1,188.4
Less: allowance for credit losses	(119.1		)	(30.1		)	(18.6		)	(18.8		)	(12.7		)
Total loans	11,017.6			2,781.6			1,718.6			1,743.1			1,175.7
Other assets acquired through foreclosure, net	43.9			8.4			20.8			—			0.3
Goodwill and other intangible assets, net	305.4			—			24.8			—			158.2
Other assets	641.4			43.9			62.3			15.7			16.1
Total assets	$	14,275.1		$	2,836.2		$	1,836.0		$	1,761.2		$	1,352.7
Liabilities:
Deposits	$	12,030.6		$	2,880.7		$	3,382.8		$	1,902.5		$	1,541.1
Borrowings and qualifying debt	360.3			—			—			—			—
Other liabilities	292.7			12.2			29.0			7.8			11.2
Total liabilities	12,683.6			2,892.9			3,411.8			1,910.3			1,552.3
Allocated equity:	1,591.5			309.2			244.4			191.3			293.2
Total liabilities and stockholders' equity	$	14,275.1		$	3,202.1		$	3,656.2		$	2,101.6		$	1,845.5
Excess funds provided (used)	—			365.9			1,820.2			340.4			492.8

Income Statement:
Three Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	108,718		$	32,091		$	29,946		$	24,070		$	5,216
Provision for (recovery of) credit losses	—			826			(3,148		)	633			513
Net interest income (expense) after provision for credit losses	108,718			31,265			33,094			23,437			4,703
Non-interest income	5,545			1,008			2,370			850			271
Non-interest expense	(61,209		)	(14,600		)	(15,032		)	(11,858		)	(1,913		)
Income (loss) before income taxes	53,054			17,673			20,432			12,429			3,061
Income tax expense (benefit)	13,579			6,934			7,151			5,227			1,287
Net income	$	39,475		$	10,739		$	13,281		$	7,202		$	1,774

Six Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	211,826		$	61,076		$	59,155		$	46,560		$	9,669
Provision for (recovery of) credit losses	700			158			(2,799		)	266			486
Net interest income (expense) after provision for credit losses	211,126			60,918			61,954			46,294			9,183
Non-interest income	11,787			1,947			4,653			1,515			322
Non-interest expense	(115,242		)	(29,361		)	(29,506		)	(23,479		)	(3,930		)
Income (loss) before income taxes	107,671			33,504			37,101			24,330			5,575
Income tax expense (benefit)	27,813			13,144			12,985			10,231			2,344
Net income	$	79,858		$	20,360		$	24,116		$	14,099		$	3,231

	National Business Lines
Balance Sheet:	HOA Services			Public & Nonprofit Finance			Technology & Innovation			Other NBL			Corporate & Other
At December 31, 2015	(dollars in millions)
Assets:
Cash, cash equivalents, and investment securities	$	—		$	—		$	—		$	—		$	2,250.2
Loans, net of deferred loan fees and costs	88.4			1,458.9			770.3			1,280.3			39.6
Less: allowance for credit losses	(0.9		)	(15.6		)	(8.2		)	(13.8		)	(0.4		)
Total loans	87.5			1,443.3			762.1			1,266.5			39.2
Other assets acquired through foreclosure, net	—			—			—			—			14.4
Goodwill and other intangible assets, net	—			—			122.4			—			—
Other assets	0.2			14.0			2.7			11.5			475.0
Total assets	$	87.7		$	1,457.3		$	887.2		$	1,278.0		$	2,778.8
Liabilities:
Deposits	$	1,291.9		$	—		$	842.5		$	—		$	189.1
Borrowings and qualifying debt	—			—			—			—			360.3
Other liabilities	0.5			63.8			—			40.8			127.4
Total liabilities	1,292.4			63.8			842.5			40.8			676.8
Allocated equity:	34.2			87.8			200.9			105.7			124.8
Total liabilities and stockholders' equity	$	1,326.6		$	151.6		$	1,043.4		$	146.5		$	801.6
Excess funds provided (used)	1,238.9			(1,305.7		)	156.2			(1,131.5		)	(1,977.2		)

Income Statement:
Three Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	6,436		$	4,903		$	—	$	13,093		$	(7,037	)
Provision for (recovery of) credit losses	71			1,469			—		(288		)	(76		)
Net interest income (expense) after provision for credit losses	6,365			3,434			—		13,381			(6,961		)
Non-interest income	80			433			—		(192		)	725
Non-interest expense	(4,100		)	(1,384		)	—		(4,061		)	(8,261		)
Income (loss) before income taxes	2,345			2,483			—		9,128			(14,497		)
Income tax expense (benefit)	880			932			—		3,423			(12,255		)
Net income	$	1,465		$	1,551		$	—	$	5,705		$	(2,242	)

Six Months Ended June 30, 2015:	(in thousands)
Net interest income (expense)	$	12,204		$	9,484		$	—	$	26,054		$	(12,376	)
Provision for (recovery of) credit losses	141			2,106			—		413			(71		)
Net interest income (expense) after provision for credit losses	12,063			7,378			—		25,641			(12,305		)
Non-interest income	153			639			—		245			2,313
Non-interest expense	(8,470		)	(2,637		)	—		(7,716		)	(10,143		)
Income (loss) before income taxes	3,746			5,380			—		18,170			(20,135		)
Income tax expense (benefit)	1,405			2,018			—		6,814			(21,128		)
Net income	$	2,341		$	3,362		$	—	$	11,356		$	993

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Mergers, Acquisitions and Dispositions (Tables)

6 Months Ended

Jun. 30, 2016

Business Combinations [Abstract]

Schedule of Identifiable Assets Acquired and Liabilities Assumed

The recognized amounts of identifiable assets acquired and liabilities assumed are as follows:

	April 20, 2016
	(in thousands)
Assets:
Loans	$	1,280,997
Other assets	3,560
Total assets	$	1,284,557
Liabilities:
Other liabilities	$	12,559
Total liabilities	12,559
Net assets acquired	$	1,271,998
Consideration paid
Cash	$	1,272,187
Goodwill	$	189

Business Acquisition, Pro Forma Information

The following table presents pro forma information as if the purchase was completed on January 1, 2015. The pro forma information includes adjustments for interest income on loans acquired and excludes acquisition / restructure expense. The pro forma information is not necessarily indicative of the results of operations as they would have been had the transactions been effected on the assumed dates.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(in thousands, except per share amounts)
Interest income	$	172,779	$	133,247	$	343,664	$	260,838
Non-interest income	8,559		5,545		21,692		11,787
Net income available to common stockholders	61,749		38,234		130,240		97,449
Earnings per share - basic	0.60		0.43		1.27		1.11
Earnings per share - diluted	0.60		0.43		1.26		1.10

The following table presents pro forma information as if the Bridge acquisition was completed on January 1, 2014.The pro forma information includes adjustments for interest income on loans and securities acquired, amortization of intangibles arising from the transaction and interest expense on deposits acquired. The pro forma information is not necessarily indicative of the results of operations as they would have been had the transactions been effected on the assumed date.

	Three Months Ended June 30, 2015:		Six Months Ended June 30, 2015:
	(in thousands, except per share amounts)
Interest income	$	139,080	$	271,502
Non-interest income	1,840		11,047
Net income available to common stockholders (1)	45,607		90,372
Earnings per share - basic	0.45		0.89
Earnings per share - diluted	0.44		0.88

(1) Excludes acquisition / restructure related costs incurred by the Company and by Bridge of $7.8 million and $8.0 million for the three and six months ended June 30, 2015, respectively, and acquisition / restructure related costs incurred by Bridge of $5.6 million and $6.8 million for the three and six months ended June 30, 2015, respectively, and related tax effects.

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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) Subsidiary
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of non-bank subsidiaries owned	1
Number of wholly-owned subsidiaries	10
Number of unconsolidated subsidiaries	8
Maximum period of internal loss allowance calculation model	10 years
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax benefit recognized as reduction of income tax expense | $	$ 3.9

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Investment Securities - Carrying Amounts and Fair Values of Investment Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	$ 36,929	$ 0
Investment securities - HTM, Unrecognized Holding Gain	4,233
Investment securities - HTM, Unrecognized Holding Loss	0
Held-to-maturity Securities, Fair Value	41,162	0
Securities available for sale Total, Amortized Cost	2,111,418	1,966,034
Securities available-for-sale, Gross Unrealized Gains	64,946	34,907
Securities available-for-sale, Gross Unrealized (Losses)	(10,825)	(18,418)
Securities available for sale Total, Estimated Fair Value	2,165,539	1,982,523
Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	50	50
Securities available-for-sale, Gross Unrealized Gains	10,133	10,059
Securities available-for-sale, Gross Unrealized (Losses)	0	(49)
Securities available for sale Total, Estimated Fair Value	10,183	10,060
Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	43,432	19,147
Securities available-for-sale, Gross Unrealized Gains	1,066	72
Securities available-for-sale, Gross Unrealized (Losses)	0	(105)
Securities available for sale Total, Estimated Fair Value	44,498	19,114
Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	7,765	12,769
Securities available-for-sale, Gross Unrealized Gains	597	482
Securities available-for-sale, Gross Unrealized (Losses)	0	0
Securities available for sale Total, Estimated Fair Value	8,362	13,251
CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	34,984	34,722
Securities available-for-sale, Gross Unrealized Gains	399	0
Securities available-for-sale, Gross Unrealized (Losses)	0	(37)
Securities available for sale Total, Estimated Fair Value	35,383	34,685
Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	326,306	320,087
Securities available-for-sale, Gross Unrealized Gains	20,455	14,743
Securities available-for-sale, Gross Unrealized (Losses)	0	0
Securities available for sale Total, Estimated Fair Value	346,761	334,830
Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	104,581	108,417
Securities available-for-sale, Gross Unrealized Gains	5,563	4,286
Securities available-for-sale, Gross Unrealized (Losses)	(868)	(1,467)
Securities available for sale Total, Estimated Fair Value	109,276	111,236
Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	3,728	4,685
Securities available-for-sale, Gross Unrealized Gains	0	6
Securities available-for-sale, Gross Unrealized (Losses)	(7)	0
Securities available for sale Total, Estimated Fair Value	3,721	4,691
Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	337,891	261,530
Securities available-for-sale, Gross Unrealized Gains	3,072	5
Securities available-for-sale, Gross Unrealized (Losses)	(1,608)	(4,407)
Securities available for sale Total, Estimated Fair Value	339,355	257,128
Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	1,184,185	1,169,631
Securities available-for-sale, Gross Unrealized Gains	23,603	5,254
Securities available-for-sale, Gross Unrealized (Losses)	(43)	(4,664)
Securities available for sale Total, Estimated Fair Value	1,207,745	1,170,221
Securities measured at fair value	1,326	1,481
Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	32,000	32,000
Securities available-for-sale, Gross Unrealized Gains	0	0
Securities available-for-sale, Gross Unrealized (Losses)	(8,299)	(7,686)
Securities available for sale Total, Estimated Fair Value	23,701	24,314
US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	34,000
Securities available-for-sale, Gross Unrealized Gains	3
Securities available-for-sale, Gross Unrealized (Losses)	0
Securities available for sale Total, Estimated Fair Value	34,003
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale Total, Amortized Cost	2,496	2,996
Securities available-for-sale, Gross Unrealized Gains	55	0
Securities available-for-sale, Gross Unrealized (Losses)	0	(3)
Securities available for sale Total, Estimated Fair Value	$ 2,551	$ 2,993

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Investment Securities - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) positions	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) positions	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) positions
Investment Identifier [Line Items]
Amount of impairment losses reclassified out of accumulated other comprehensive income into earnings	$ 0	$ 0	$ 0	$ 0
Total number of securities in an unrealized loss position | positions	59		59		146
Securities with carrying amounts were pledged	$ 833,900,000		$ 833,900,000		$ 830,700,000

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Investment Securities - Unrealized Losses and Fair Value of Investment Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses	$ 1,169	$ 7,870
Available-for-sale securities, Less Than Twelve Months, Fair Value	135,113	817,564
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses	9,656	10,548
Available-for-sale securities, Twelve Months or Longer, Fair Value	77,368	107,785
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	10,825	18,418
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	212,481	925,349
Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses		49
Available-for-sale securities, Less Than Twelve Months, Fair Value		1
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses		0
Available-for-sale securities, Twelve Months or Longer, Fair Value		0
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total		49
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total		1
Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses		105
Available-for-sale securities, Less Than Twelve Months, Fair Value		17,051
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses		0
Available-for-sale securities, Twelve Months or Longer, Fair Value		0
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total		105
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total		17,051
Other Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses		37
Available-for-sale securities, Less Than Twelve Months, Fair Value		24,729
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses		0
Available-for-sale securities, Twelve Months or Longer, Fair Value		0
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total		37
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total		24,729
Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses	182	377
Available-for-sale securities, Less Than Twelve Months, Fair Value	10,729	10,542
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses	686	1,090
Available-for-sale securities, Twelve Months or Longer, Fair Value	8,680	14,761
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	868	1,467
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	19,409	25,303
Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses	7
Available-for-sale securities, Less Than Twelve Months, Fair Value	3,721
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses	0
Available-for-sale securities, Twelve Months or Longer, Fair Value	0
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	7
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	3,721
Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses	965	3,733
Available-for-sale securities, Less Than Twelve Months, Fair Value	99,654	226,720
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses	643	674
Available-for-sale securities, Twelve Months or Longer, Fair Value	30,653	30,372
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	1,608	4,407
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	130,307	257,092
Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses	15	3,566
Available-for-sale securities, Less Than Twelve Months, Fair Value	21,009	536,515
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses	28	1,098
Available-for-sale securities, Twelve Months or Longer, Fair Value	14,334	38,338
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	43	4,664
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	35,343	574,853
Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses	0	0
Available-for-sale securities, Less Than Twelve Months, Fair Value	0	0
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses	8,299	7,686
Available-for-sale securities, Twelve Months or Longer, Fair Value	23,701	24,314
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	8,299	7,686
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	$ 23,701	24,314
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less Than Twelve Months, Aggregate Losses		3
Available-for-sale securities, Less Than Twelve Months, Fair Value		2,006
Available-for-sale securities, Twelve Months or Longer, Aggregate Losses		0
Available-for-sale securities, Twelve Months or Longer, Fair Value		0
Available-for-sale securities, Continuous Unrealized Loss Position, Aggregate Losses, Total		3
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total		$ 2,006

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Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	$ 15,445
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	21,484
Investment securities - HTM, at amortized cost	36,929	$ 0
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	17,187
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	23,975
Held-to-maturity Securities, Fair Value	41,162	0
Securities available for sale, Due in one year or less, Amortized Cost	55,422
Securities available for sale, After one year through five years, Amortized Cost	73,571
Securities available for sale, After five years through ten years, Amortized Cost	89,966
Securities available for sale, After ten years, Amortized Cost	323,223
Securities available for sale, Mortgage backed securities, Amortized Cost	1,569,236
Securities available for sale Total, Amortized Cost	2,111,418	1,966,034
Securities available for sale, Due in one year or less, Estimated Fair Value	56,134
Securities available for sale, After one year through five years, Estimated Fair Value	77,406
Securities available for sale, After five years through ten years, Estimated Fair Value	93,725
Securities available for sale, After ten years, Estimated Fair Value	342,955
Securities available for sale, Mortgage backed securities, Estimated Fair Value	1,595,319
Securities available for sale Total, Estimated Fair Value	$ 2,165,539	$ 1,982,523

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Investment Securities - Investment Securities by Credit Rating Type (Detail) - USD ($) $ in Thousands	Jun. 30, 2016		Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	$ 36,929		$ 0
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,165,539		1,982,523
Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	10,183		10,060
Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	44,498		19,114
Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	8,362		13,251
CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	35,383		34,685
Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	346,761		334,830
Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	109,276		111,236
Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	3,721		4,691
Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	339,355		257,128
Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	1,207,745		1,170,221
Securities measured at fair value	1,326		1,481
Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	23,701		24,314
US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	34,003
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,551		2,993
AAA [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	287,530	[1]	248,245	[2]
AAA [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AAA [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AAA [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AAA [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AAA [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	15,445
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	7,853		7,949
AAA [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AAA [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	3,721		4,691
AAA [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	275,956		235,605
AAA [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Securities measured at fair value	0		0
AAA [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AAA [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0
AAA [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	1,271,349	[1]	1,192,328	[2]
Split-rated AAA/AA Plus [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	27,050		19,114
Split-rated AAA/AA Plus [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	0
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	1,207,745		1,170,221
Securities measured at fair value	1,326		1,481
Split-rated AAA/AA Plus [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Split-rated AAA/AA Plus [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	34,003
Split-rated AAA/AA Plus [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,551		2,993
AA Plus to AA- [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	238,133	[1]	183,221	[2]
AA Plus to AA- [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AA Plus to AA- [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AA Plus to AA- [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,701		2,721
AA Plus to AA- [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AA Plus to AA- [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	0
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	200,699		180,460
AA Plus to AA- [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AA Plus to AA- [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AA Plus to AA- [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	34,733		40
AA Plus to AA- [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Securities measured at fair value	0		0
AA Plus to AA- [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
AA Plus to AA- [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0
AA Plus to AA- [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
A Plus to A- [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	140,215	[1]	139,785	[2]
A Plus to A- [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
A Plus to A- [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
A Plus to A- [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	5,661		5,489
A Plus to A- [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
A Plus to A- [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	0
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	131,929		131,110
A Plus to A- [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
A Plus to A- [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
A Plus to A- [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,625		3,186
A Plus to A- [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Securities measured at fair value	0		0
A Plus to A- [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
A Plus to A- [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0
A Plus to A- [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BBB Plus to BBB- [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	102,867	[1]	117,303	[2]
BBB Plus to BBB- [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BBB Plus to BBB- [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BBB Plus to BBB- [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		5,041
BBB Plus to BBB- [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BBB Plus to BBB- [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	0
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	6,109		6,243
BBB Plus to BBB- [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	71,814		79,955
BBB Plus to BBB- [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BBB Plus to BBB- [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	1,243		1,750
BBB Plus to BBB- [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Securities measured at fair value	0		0
BBB Plus to BBB- [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	23,701		24,314
BBB Plus to BBB- [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0
BBB Plus to BBB- [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BB Plus and below [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	32,541	[1]	36,600	[2]
BB Plus and below [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	10,183		10,060
BB Plus and below [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BB Plus and below [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BB Plus and below [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BB Plus and below [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	0
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	170		180
BB Plus and below [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	19,330		23,655
BB Plus and below [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BB Plus and below [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,858		2,705
BB Plus and below [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Securities measured at fair value	0		0
BB Plus and below [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
BB Plus and below [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0
BB Plus and below [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Corporate Credit Quality Indicator Unrated [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	92,904	[1]	65,041	[2]
Corporate Credit Quality Indicator Unrated [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Corporate Credit Quality Indicator Unrated [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	17,448		0
Corporate Credit Quality Indicator Unrated [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Corporate Credit Quality Indicator Unrated [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	35,383		34,685
Corporate Credit Quality Indicator Unrated [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	21,484
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	1		8,888
Corporate Credit Quality Indicator Unrated [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	18,132		7,626
Corporate Credit Quality Indicator Unrated [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Corporate Credit Quality Indicator Unrated [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	21,940		13,842
Corporate Credit Quality Indicator Unrated [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Securities measured at fair value	0		0
Corporate Credit Quality Indicator Unrated [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Corporate Credit Quality Indicator Unrated [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0
Corporate Credit Quality Indicator Unrated [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	0		0
Rated Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	2,165,539	[1]	1,982,523	[2]
Rated Securities [Member] | Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	10,183		10,060
Rated Securities [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	44,498		19,114
Rated Securities [Member] | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	8,362		13,251
Rated Securities [Member] | CRA investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	35,383		34,685
Rated Securities [Member] | Municipal obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - HTM, at amortized cost	36,929
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	346,761		334,830
Rated Securities [Member] | Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	109,276		111,236
Rated Securities [Member] | Private label commercial mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	3,721		4,691
Rated Securities [Member] | Private label residential mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	339,355		257,128
Rated Securities [Member] | Residential mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	1,207,745		1,170,221
Securities measured at fair value	1,326		1,481
Rated Securities [Member] | Trust preferred securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	23,701		24,314
Rated Securities [Member] | US Government-sponsored Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	34,003
Rated Securities [Member] | US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities - AFS, at fair value; amortized cost of $2,111,418 at June 30, 2016 and $1,966,034 at December 31, 2015	$ 2,551		$ 2,993

[1] Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch

[2] Where ratings differ, the Company uses the average of the ratings by S&P, Moody’s, and Fitch.

XML

Investment Securities - Gross Gains and (Losses) on Sales of Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Gross gains	$ 0	$ 55	$ 2,057	$ 1,103
Gross losses	0	0	(1,056)	(459)
Net gains on sales of investment securities	$ 0	$ 55	$ 1,001	$ 644

XML

Loans, Leases and Allowance for Credit Losses - Schedule of Held for Investment Loan Portfolio Composition of Loans, Leases and Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	$ 12,855,511	$ 11,112,854
Allowance for credit losses	(122,104)	(119,068)
Loans, net	12,733,407	10,993,786
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	5,454,939	5,114,257
Commercial Real Estate Non Owner Occupied Multi Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	3,601,331	2,283,536
Owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	2,008,261	2,083,285
Allowance for credit losses	(12,002)	(11,811)
Construction and land development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	1,333,537	1,133,439
Allowance for credit losses	(21,386)	(18,976)
Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	293,020	322,939
Allowance for credit losses	(4,546)	(5,278)
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	122,668	148,493
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans - HFI, net of deferred loan fees and costs	41,755	26,905
Allowance for credit losses	$ (758)	$ (473)

XML

Loans, Leases and Allowance for Credit Losses - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Net deferred loan fees and costs		$ 19,800,000		$ 19,800,000		$ 19,200,000
Receivable with Imputed Interest, Discount		7,500,000		7,500,000		8,200,000
Interest rate and credit marks on acquired loans		84,700,000		84,700,000		40,500,000
Loans - HFS		22,336,000		22,336,000		23,809,000
Reduction in interest income due to nonaccrual loans			$ 0		$ 0
Aggregate carrying amount of impaired loans	[1]	20,695,000		20,695,000		24,287,000
Impaired loans with no allowance recorded	[2]	95,771,000		95,771,000		104,587,000
Impaired loans with an allowance recorded	[3]	6,395,000		6,395,000		4,658,000
Total average investment in impaired loans		109,833,000	155,943,000	116,173,000	159,186,000
Non-accrual TDR loans	[4]	39,685,000		39,685,000		48,381,000
Purchased loans		64,600,000	7,700,000	98,300,000	26,100,000
Carrying value of loans sold				23,800,000	56,300,000
Gains recognized on loans sold				2,500,000	300,000
Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Reduction in interest income due to nonaccrual loans		500,000	700,000	900,000	1,400,000
Non-accrual TDR loans						48,381,000
Troubled Debt Restructured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aggregate carrying amount of impaired loans		600,000		600,000		3,000,000
Impaired loans with no allowance recorded		68,600,000		68,600,000		85,900,000
Impaired loans with an allowance recorded		200,000		200,000		300,000
Total average investment in impaired loans		72,100,000	121,200,000	75,100,000	123,600,000
Non-accrual TDR loans		4,200,000		4,200,000		18,200,000
Loan commitments outstanding		0		0		135,000
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aggregate carrying amount of impaired loans		13,857,000		13,857,000		18,230,000
Impaired loans with no allowance recorded		18,185,000		18,185,000		8,283,000
Impaired loans with an allowance recorded		$ 5,060,000		$ 5,060,000		$ 3,518,000
Purchased loans			2,000,000		13,000,000
Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Purchased loans			$ 5,700,000		11,700,000
Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Purchased loans					$ 1,400,000

[1] Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

[2] Includes TDR loans of $68.6 million and $85.9 million at June 30, 2016 and December 31, 2015, respectively.

[3] Includes valuation allowance related to TDR loans of $0.2 million and $0.3 million at June 30, 2016 and December 31, 2015, respectively.

[4] Includes non-accrual TDR loans of $4.2 million and $18.2 million at June 30, 2016 and December 31, 2015, respectively.

XML

Loans, Leases and Allowance for Credit Losses - Contractual Aging of Loan Portfolio by Class of Loans Including Loans Held for Sale and Excluding Deferred Fees/Costs (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 12,829,107	$ 11,046,589
Total Past Due	26,404	66,265
Total	12,855,511	11,112,854
Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,002,907	2,078,968
Total Past Due	5,354	4,317
Total	2,008,261	2,083,285
Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,408,792	2,099,274
Total Past Due	1,610	5,303
Total	3,410,402	2,104,577
Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	190,929	178,959
Total Past Due	0	0
Total	190,929	178,959
Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,441,453	5,066,197
Total Past Due	13,486	48,060
Total	5,454,939	5,114,257
Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	122,560	145,905
Total Past Due	108	2,588
Total	122,668	148,493
Construction and land development [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	850,558	694,527
Total Past Due	0	0
Total	850,558	694,527
Construction and land development [Member] | Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	481,695	438,495
Total Past Due	1,284	417
Total	482,979	438,912
Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	288,640	317,677
Total Past Due	4,380	5,262
Total	293,020	322,939
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	41,573	26,587
Total Past Due	182	318
Total	41,755	26,905
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,169	30,184
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	130	445
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,610	2,481
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	150	26,358
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	70	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	205	888
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4	12
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,292	14,736
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	362
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,598	14,124
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	38	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	641	159
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15	91
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	21,943	21,345
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,224	3,510
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	2,822
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,738	7,578
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	2,588
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,284	417
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,534	4,215
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 163	$ 215

XML

Loans, Leases and Allowance for Credit Losses - Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due 90 Days Still Accruing Interest by Loan Class (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		$ 12,829,107	$ 11,046,589
Total Past Due		26,404	66,265
Total Non-accrual	[1]	39,685	48,381
Loans past due 90 days or more and still accruing		6,991	3,028
Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		23,630	19,590
Total Past Due		16,055	28,791
Total Non-accrual			48,381
Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		2,002,907	2,078,968
Total Past Due		5,354	4,317
Loans past due 90 days or more and still accruing		3,526	339
Commercial real estate [Member] | Owner occupied [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		1,069	749
Total Past Due		1,698	3,253
Total Non-accrual		2,767	4,002
Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		3,408,792	2,099,274
Total Past Due		1,610	5,303
Loans past due 90 days or more and still accruing		0	0
Commercial real estate [Member] | Non-owner occupied [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		8,129	11,851
Total Past Due		0	2,822
Total Non-accrual		8,129	14,673
Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		190,929	178,959
Total Past Due		0	0
Loans past due 90 days or more and still accruing		0	0
Commercial real estate [Member] | Multi-family [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		0	0
Total Past Due		0	0
Total Non-accrual		0	0
Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		5,441,453	5,066,197
Total Past Due		13,486	48,060
Loans past due 90 days or more and still accruing		3,461	2,671
Commercial and industrial [Member] | Commercial [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		13,032	3,263
Total Past Due		9,380	15,026
Total Non-accrual		22,412	18,289
Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		122,560	145,905
Total Past Due		108	2,588
Loans past due 90 days or more and still accruing		0	0
Commercial and industrial [Member] | Leases [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		0	0
Total Past Due		0	2,588
Total Non-accrual		0	2,588
Construction and land development [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		850,558	694,527
Total Past Due		0	0
Loans past due 90 days or more and still accruing		0	0
Construction and land development [Member] | Construction [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		0	0
Total Past Due		0	0
Total Non-accrual		0	0
Construction and land development [Member] | Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		481,695	438,495
Total Past Due		1,284	417
Loans past due 90 days or more and still accruing		0	0
Construction and land development [Member] | Land [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		0	1,892
Total Past Due		1,284	417
Total Non-accrual		1,284	2,309
Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		288,640	317,677
Total Past Due		4,380	5,262
Loans past due 90 days or more and still accruing		4	0
Residential real estate [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		1,400	1,835
Total Past Due		3,534	4,489
Total Non-accrual		4,934	6,324
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		41,573	26,587
Total Past Due		182	318
Loans past due 90 days or more and still accruing		0	18
Consumer [Member] | Non-accrual loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		0	0
Total Past Due		159	196
Total Non-accrual		$ 159	$ 196

[1] Includes non-accrual TDR loans of $4.2 million and $18.2 million at June 30, 2016 and December 31, 2015, respectively.

XML

Loans, Leases and Allowance for Credit Losses - Loans by Risk Rating (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	$ 12,829,107	$ 11,046,589
Financing Receivable, Recorded Investment, Past Due	26,404	66,265
Total	12,855,511	11,112,854
Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	293,020	322,939
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	41,755	26,905
Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,008,261	2,083,285
Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,410,402	2,104,577
Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	190,929	178,959
Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	5,454,939	5,114,257
Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	122,668	148,493
Construction and land development [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	850,558	694,527
Construction and land development [Member] | Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	482,979	438,912
Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	12,542,844	10,799,558
Total	12,544,753	10,805,542
Pass [Member] | Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	282,079	310,067
Pass [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	41,392	26,438
Pass [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,965,474	2,032,932
Pass [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,316,897	2,054,428
Pass [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	190,929	178,959
Pass [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	5,330,572	4,962,930
Pass [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	122,136	140,531
Pass [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	825,983	678,438
Pass [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	469,291	420,819
Watch [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	150,510	140,932
Total	153,823	141,588
Watch [Member] | Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	349	776
Watch [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	62	209
Watch [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	28,077	28,422
Watch [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	44,045	14,867
Watch [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Watch [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	72,170	76,283
Watch [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	201	4,580
Watch [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	8,420	16,089
Watch [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	499	362
Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	133,830	104,232
Total	155,012	161,269
Substandard [Member] | Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	10,592	12,096
Substandard [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	301	258
Substandard [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	12,787	20,814
Substandard [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	49,460	35,282
Substandard [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Substandard [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	52,197	74,294
Substandard [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	331	794
Substandard [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	16,155	0
Substandard [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	13,189	17,731
Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	1,923	1,867
Total	1,923	4,455
Doubtful [Member] | Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Doubtful [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Doubtful [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,923	1,117
Doubtful [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Doubtful [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Doubtful [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	750
Doubtful [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	2,588
Doubtful [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Doubtful [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	0	0
Total	0	0
Loss [Member] | Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Construction and land development [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Loss [Member] | Construction and land development [Member] | Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	0	0
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,169	30,184
Financing Receivables, 30 to 59 Days Past Due [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,894	1,907
Financing Receivables, 30 to 59 Days Past Due [Member] | Watch [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	129	271
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	146	28,006
Financing Receivables, 30 to 59 Days Past Due [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,292	14,736
Financing Receivables, 60 to 89 Days Past Due [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	4,077
Financing Receivables, 60 to 89 Days Past Due [Member] | Watch [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	229	385
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,063	10,274
Financing Receivables, 60 to 89 Days Past Due [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	21,943	21,345
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	15	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Watch [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,955	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	18,973	18,757
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	2,588
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 0	$ 0

XML

Loans, Leases and Allowance for Credit Losses - Recorded Investment in Loans Classified as Impaired (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Impaired loans with an allowance recorded	[1]	$ 20,695	$ 24,287
Impaired loans with no allowance recorded	[2]	95,771	104,587
Total impaired loans		116,466	128,874
Valuation allowance related to impaired loans	[3]	$ (6,395)	$ (4,658)

[1] Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

[2] Includes TDR loans of $68.6 million and $85.9 million at June 30, 2016 and December 31, 2015, respectively.

[3] Includes valuation allowance related to TDR loans of $0.2 million and $0.3 million at June 30, 2016 and December 31, 2015, respectively.

XML

Loans, Leases and Allowance for Credit Losses - Impaired Loans by Loan Class (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	$ 116,466	$ 128,874
Residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	15,667	16,575
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	263	334
Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	18,142	23,153
Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	32,485	41,081
Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	0	0
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	32,042	26,513
Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	32,042	26,513
Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	332	2,896
Construction and land development [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	4	0
Construction and land development [Member] | Land [Member]
Financing Receivable, Impaired [Line Items]
Total impaired loans by class	$ 17,531	$ 18,322

XML

Loans, Leases and Allowance for Credit Losses - Schedule of Average Investment in Impaired Loans and Income Recognized on Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Receivables [Abstract]
Total average investment in impaired loans	$ 109,833	$ 155,943	$ 116,173	$ 159,186
Interest income recognized on impaired loans	1,050	1,126	2,163	2,310
Interest recognized on nonaccrual loans, cash basis	$ 225	$ 548	$ 397	$ 1,201

XML

Loans, Leases and Allowance for Credit Losses - Average Investment in Impaired Loans by Loan Class (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	$ 109,833	$ 155,943	$ 116,173	$ 159,186
Residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	15,635	19,838	15,700	19,375
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	298	368	313	360
Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	19,075	38,750	20,406	40,839
Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	31,894	59,873	32,463	62,636
Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	0	0	0	0
Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	24,299	12,401	28,001	12,835
Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	333	4,879	1,191	2,618
Construction and land development [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	0	0	0	0
Construction and land development [Member] | Land [Member]
Financing Receivable, Impaired [Line Items]
Total average investment in impaired loans by loan class	$ 18,299	$ 19,834	$ 18,099	$ 20,523

XML

Loans, Leases and Allowance for Credit Losses - Interest Income on Impaired Loans by Loan Class (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	$ 1,050	$ 1,126	$ 2,163	$ 2,310
Residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	125	102	256	259
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	1	1	3	3
Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	247	406	542	827
Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	313	360	651	690
Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	0	0	0	0
Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	121	60	229	139
Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	4	0	36	0
Construction and land development [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	0	0	0	0
Construction and land development [Member] | Land [Member]
Financing Receivable, Impaired [Line Items]
Total interest income on impaired loans by class	$ 239	$ 197	$ 446	$ 392

XML

Loans, Leases and Allowance for Credit Losses - Tabular Disclosure of Nonperforming Assets (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Non-accrual TDR loans	[1]	$ 39,685		$ 48,381
Loans past due 90 days or more on accrual status		6,991		3,028
Troubled debt restructured loans		65,008		70,707
Total nonperforming loans		111,684		122,116
Other assets acquired through foreclosure, net		49,842	$ 52,776	43,942	$ 59,335	$ 63,759	$ 57,150
Total nonperforming assets		$ 161,526		$ 166,058

[1] Includes non-accrual TDR loans of $4.2 million and $18.2 million at June 30, 2016 and December 31, 2015, respectively.

XML

Loans, Leases and Allowance for Credit Losses - Acquired Loans (Details) - GE Capital US Holdings, Inc. [Member] $ in Thousands	Apr. 20, 2016 USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	$ 1,842,800
Cash flows expected to be collected	1,516,097
Fair value of loans acquired	1,280,997
PCI [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	159,822
Cash flows expected to be collected	119,619
Fair value of loans acquired	93,267
Non-PCI [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	1,682,978
Cash flows expected to be collected	1,396,478
Fair value of loans acquired	1,187,730
Commercial real estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	1,722,798
Cash flows expected to be collected	1,423,388
Fair value of loans acquired	1,207,748
Commercial real estate [Member] | PCI [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	143,734
Cash flows expected to be collected	107,865
Fair value of loans acquired	85,329
Commercial real estate [Member] | Non-PCI [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	1,579,064
Cash flows expected to be collected	1,315,523
Fair value of loans acquired	1,122,419
Construction and land development [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	120,002
Cash flows expected to be collected	92,709
Fair value of loans acquired	73,249
Construction and land development [Member] | PCI [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	16,088
Cash flows expected to be collected	11,754
Fair value of loans acquired	7,938
Construction and land development [Member] | Non-PCI [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest payments	103,914
Cash flows expected to be collected	80,955
Fair value of loans acquired	$ 65,311

XML

Loans, Leases and Allowance for Credit Losses - Changes in Accretable Discount for Loans Purchased with Credit Quality Deterioration (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period		$ 13,541	$ 17,956	$ 15,925	$ 19,156
Additions due to acquisition		4,301	857	4,301	857
Reclassifications from non-accretable to accretable yield (1)	[1]	0	265	0	695
Accretion to interest income		(887)	(1,012)	(1,669)	(2,090)
Reversal of fair value adjustments upon disposition of loans		(1,092)	(876)	(2,694)	(1,428)
Balance at end of period		$ 15,863	$ 17,190	$ 15,863	$ 17,190

[1] The primary drivers of reclassification from non-accretable to accretable yield resulted from changes in estimated cash flows.

XML

Loans, Leases and Allowance for Credit Losses - Allowances for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 119,227	$ 112,098	$ 119,068	$ 110,216
Charge-offs	1,451	2,042	9,452	2,889
Recoveries	(1,828)	(5,000)	(7,488)	(7,029)
Provision for credit losses	2,500	0	5,000	700
Ending balance	122,104	115,056	122,104	115,056
Construction and land development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	19,425	17,999	18,976	18,558
Charge-offs	0	0	0	0
Recoveries	(58)	(1,373)	(153)	(1,530)
Provision for credit losses	1,903	165	2,257	(551)
Ending balance	21,386	19,537	21,386	19,537
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	23,104	28,111	23,160	28,783
Charge-offs	244	0	654	0
Recoveries	(770)	(1,738)	(4,435)	(2,121)
Provision for credit losses	1,237	(903)	(2,074)	(1,958)
Ending balance	24,867	28,946	24,867	28,946
Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,938	6,666	5,278	7,456
Charge-offs	0	218	26	618
Recoveries	(153)	(1,184)	(410)	(1,717)
Provision for credit losses	(545)	(1,233)	(1,116)	(2,156)
Ending balance	4,546	6,399	4,546	6,399
Commercial and industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	71,156	58,651	71,181	54,566
Charge-offs	1,161	1,771	8,652	2,164
Recoveries	(804)	(681)	(2,380)	(1,597)
Provision for credit losses	(252)	2,028	5,638	5,590
Ending balance	70,547	59,589	70,547	59,589
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	604	671	473	853
Charge-offs	46	53	120	107
Recoveries	(43)	(24)	(110)	(64)
Provision for credit losses	157	(57)	295	(225)
Ending balance	$ 758	$ 585	$ 758	$ 585

XML

Loans, Leases and Allowance for Credit Losses - Summary of Impairment Method Information Related to Loans and Allowance for Credit Losses (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded	[1]	$ 20,695	$ 24,287
Impaired loans with no allowance recorded	[2]	95,771	104,587
Total loans individually evaluated for impairment		116,466	128,874
Loans collectively evaluated for impairment		12,573,363	10,901,140
Loans acquired with deteriorated credit quality		116,466	128,874
Total recorded investment		12,855,511	11,112,854
Impaired loans with an allowance recorded		21,002	25,345
Impaired loans with no allowance recorded		335,030	333,268
Total loans individually evaluated for impairment		356,032	358,613
Loans collectively evaluated for impairment		12,573,363	10,901,140
Total unpaid principal balance		13,143,171	11,379,517
Impaired loans with an allowance recorded	[3]	6,395	4,658
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		6,395	4,658
Loans collectively evaluated for impairment		115,319	114,374
Total loans held for investment		122,104	119,068
Owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded		777	2,778
Impaired loans with no allowance recorded		17,365	20,375
Total loans individually evaluated for impairment		18,142	23,153
Loans collectively evaluated for impairment		1,976,526	2,044,934
Total recorded investment		2,008,261	2,083,285
Impaired loans with an allowance recorded		777	2,778
Impaired loans with no allowance recorded		60,891	63,709
Total loans individually evaluated for impairment		61,668	66,487
Loans collectively evaluated for impairment		1,976,526	2,044,934
Total unpaid principal balance		2,056,072	2,131,648
Impaired loans with an allowance recorded		777	858
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		777	858
Loans collectively evaluated for impairment		11,225	10,953
Total loans held for investment		12,002	11,811
Non-owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded		5,331	2,344
Impaired loans with no allowance recorded		27,154	38,737
Total loans individually evaluated for impairment		32,485	41,081
Loans collectively evaluated for impairment		3,439,886	2,180,250
Total recorded investment		3,601,331	2,283,536
Impaired loans with an allowance recorded		5,331	2,344
Impaired loans with no allowance recorded		53,045	61,692
Total loans individually evaluated for impairment		58,376	64,036
Loans collectively evaluated for impairment		3,439,886	2,180,250
Total unpaid principal balance		3,661,945	2,332,467
Impaired loans with an allowance recorded		430	11
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		430	11
Loans collectively evaluated for impairment		12,387	11,302
Total loans held for investment		12,865	11,349
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded		13,857	18,230
Impaired loans with no allowance recorded		18,185	8,283
Total loans individually evaluated for impairment		32,042	26,513
Loans collectively evaluated for impairment		5,421,189	5,085,299
Total recorded investment		5,454,939	5,114,257
Impaired loans with an allowance recorded		14,109	19,233
Impaired loans with no allowance recorded		89,584	71,773
Total loans individually evaluated for impairment		103,693	91,006
Loans collectively evaluated for impairment		5,421,189	5,085,299
Total unpaid principal balance		5,533,716	5,184,125
Impaired loans with an allowance recorded		5,060	3,518
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		5,060	3,518
Loans collectively evaluated for impairment		63,885	65,806
Total loans held for investment		69,287	69,324
Residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded		711	914
Impaired loans with no allowance recorded		14,956	15,661
Total loans individually evaluated for impairment		15,667	16,575
Loans collectively evaluated for impairment		274,548	303,372
Total recorded investment		293,020	322,939
Impaired loans with an allowance recorded		766	969
Impaired loans with no allowance recorded		42,458	44,142
Total loans individually evaluated for impairment		43,224	45,111
Loans collectively evaluated for impairment		274,548	303,372
Total unpaid principal balance		321,098	352,019
Impaired loans with an allowance recorded		127	270
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		127	270
Loans collectively evaluated for impairment		4,419	5,008
Total loans held for investment		4,546	5,278
Construction and land development [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded		17,535	18,322
Total loans individually evaluated for impairment		17,535	18,322
Loans collectively evaluated for impairment		1,297,386	1,115,117
Total recorded investment		1,333,537	1,133,439
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded		84,600	82,800
Total loans individually evaluated for impairment		84,600	82,800
Loans collectively evaluated for impairment		1,297,386	1,115,117
Total unpaid principal balance		1,402,041	1,197,917
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		0	0
Loans collectively evaluated for impairment		21,386	18,976
Total loans held for investment		21,386	18,976
Commercial leases [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded		332	2,896
Total loans individually evaluated for impairment		332	2,896
Loans collectively evaluated for impairment		122,336	145,597
Total recorded investment		122,668	148,493
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded		484	5,229
Total loans individually evaluated for impairment		484	5,229
Loans collectively evaluated for impairment		122,336	145,597
Total unpaid principal balance		122,820	150,826
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		0	0
Loans collectively evaluated for impairment		1,260	1,857
Total loans held for investment		1,260	1,857
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance recorded		19	21
Impaired loans with no allowance recorded		244	313
Total loans individually evaluated for impairment		263	334
Loans collectively evaluated for impairment		41,492	26,571
Total recorded investment		41,755	26,905
Impaired loans with an allowance recorded		19	21
Impaired loans with no allowance recorded		3,968	3,923
Total loans individually evaluated for impairment		3,987	3,944
Loans collectively evaluated for impairment		41,492	26,571
Total unpaid principal balance		45,479	30,515
Impaired loans with an allowance recorded		1	1
Impaired loans with no allowance recorded		0	0
Total loans individually evaluated for impairment		1	1
Loans collectively evaluated for impairment		757	472
Total loans held for investment		758	473
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		165,682	82,840
Loans acquired with deteriorated credit quality		213,776	119,764
Impaired loans with an allowance recorded		390	36
Receivables Acquired with Deteriorated Credit Quality [Member] | Owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		13,593	15,198
Loans acquired with deteriorated credit quality		17,878	20,227
Impaired loans with an allowance recorded		0	0
Receivables Acquired with Deteriorated Credit Quality [Member] | Non-owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		128,960	62,205
Loans acquired with deteriorated credit quality		163,683	88,181
Impaired loans with an allowance recorded		48	36
Receivables Acquired with Deteriorated Credit Quality [Member] | Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		1,708	2,445
Loans acquired with deteriorated credit quality		8,834	7,820
Impaired loans with an allowance recorded		342	0
Receivables Acquired with Deteriorated Credit Quality [Member] | Residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		2,805	2,992
Loans acquired with deteriorated credit quality		3,326	3,536
Impaired loans with an allowance recorded		0	0
Receivables Acquired with Deteriorated Credit Quality [Member] | Construction and land development [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		18,616	0
Loans acquired with deteriorated credit quality		20,055	0
Impaired loans with an allowance recorded		0	0
Receivables Acquired with Deteriorated Credit Quality [Member] | Commercial leases [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		0	0
Loans acquired with deteriorated credit quality		0	0
Impaired loans with an allowance recorded		0	0
Receivables Acquired with Deteriorated Credit Quality [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans acquired with deteriorated credit quality		0	0
Loans acquired with deteriorated credit quality		0	0
Impaired loans with an allowance recorded		$ 0	$ 0

[1] Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

[2] Includes TDR loans of $68.6 million and $85.9 million at June 30, 2016 and December 31, 2015, respectively.

[3] Includes valuation allowance related to TDR loans of $0.2 million and $0.3 million at June 30, 2016 and December 31, 2015, respectively.

XML

Loans, Leases and Allowance for Credit Losses - Troubled Debt Restructured Loans by Loan Class (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015 USD ($) SecurityLoan	Jun. 30, 2015 USD ($) SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	1
Pre-Modification Outstanding Recorded Investment	$ 256	$ 256
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	256	256
Waived Fees and Other Expenses	$ 0	$ 0
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0
Owner occupied [Member] | Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0
Non-owner occupied [Member] | Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0
Multi-family [Member] | Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0
Commercial [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	1
Pre-Modification Outstanding Recorded Investment	$ 256	$ 256
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	256	256
Waived Fees and Other Expenses	$ 0	$ 0
Leases [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0
Construction [Member] | Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0
Land [Member] | Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Forgiven Principal Balance	0	0
Lost Interest Income	0	0
Post-Modification Outstanding Recorded Investment	0	0
Waived Fees and Other Expenses	$ 0	$ 0

XML

Loans, Leases and Allowance for Credit Losses - Troubled Debt Restructured Loans by Class for Which There was Payment Default (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) SecurityLoan	Jun. 30, 2015 USD ($) SecurityLoan	Jun. 30, 2016 USD ($) SecurityLoan	Jun. 30, 2015 USD ($) SecurityLoan
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	1	1	2	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 333	$ 202	$ 5,714	$ 339
Commercial real estate [Member] | Owner occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Commercial real estate [Member] | Non-owner occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 5,381	$ 0
Commercial real estate [Member] | Multi-family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Commercial and industrial [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Commercial and industrial [Member] | Leases [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Construction and land development [Member] | Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 137
Construction and land development [Member] | Land [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	1	1	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 333	$ 202	$ 333	$ 202
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | SecurityLoan	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0

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Other Assets Acquired through Foreclosure - Changes in Other Assets Acquired through Foreclosure (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance, beginning of the period, Gross Balance	$ 61,346		$ 77,968		$ 52,984		$ 71,421
Additions from acquisitions			1,550				1,550
Transfers to other assets acquired through foreclosure, net, Gross Balance	88		5,739		10,726		13,459
Proceeds from sale of other real estate owned and repossessed assets, net, Gross Balance	(4,480)		(15,415)		(6,916)		(17,703)
Gains (losses), net, Gross Balance	(489)	[1]	1,940	[1]	(329)	[2]	3,055	[2]
Balance, end of period, Gross Balance	56,465		71,782		56,465		71,782
Balance, beginning of the period, Valuation Allowance	(8,570)		(14,209)		(9,042)		(14,271)
Proceeds from sale of other real estate owned and repossessed assets, net, Valuation Allowance	1,813		2,480		2,108		3,328
Valuation adjustments, net, Valuation Allowance	134		(718)		311		(1,504)
Balance, end of period, Valuation Allowance	(6,623)		(12,447)		(6,623)		(12,447)
Balance, beginning of the period, Net Balance	52,776		63,759		43,942		57,150
Transfers to other assets acquired through foreclosure, net, Net Balance	88		5,739		10,726		13,459
Proceeds from sale of other real estate owned and repossessed assets, net, Net Balance	(2,667)		(12,935)		(4,808)		(14,375)
Valuation adjustments of other repossessed assets, net	134		(718)		311		(1,504)
Gains (losses), net, Net Balance	(489)	[1]	1,940	[1]	(329)	[2]	3,055	[2]
Balance, end of period, Net Balance	$ 49,842		$ 59,335		$ 49,842		$ 59,335

[1] There were no net gains related to initial transfers to other assets during each of the three months ended June 30, 2016 and 2015, respectively, pursuant to accounting guidance.

[2] Includes net gains related to initial transfers to other assets of zero and $0.6 million during the six months ended June 30, 2016 and 2015, respectively, pursuant to accounting guidance.

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Other Assets Acquired through Foreclosure - Changes in Other Assets Acquired through Foreclosure Narrative (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) Property	Jun. 30, 2015 USD ($) Property	Jun. 30, 2016 USD ($) Property	Jun. 30, 2015 USD ($) Property	Dec. 31, 2015 Property
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Gains related to initial transfer to other assets | $	$ 0	$ 0	$ 0	$ 600,000
Number of properties held | Property	34	56	34	56	39

XML

Other Borrowings - Company's Borrowings (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Short Term
Federal Funds Purchased	$ 0	$ 0
FHLB advances	0	150,000
Short-term Debt	$ 0	$ 150,000

XML

Other Borrowings - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Debt [Line Items]
Federal Funds Purchased	$ 0	$ 0
FHLB advances	0	$ 150,000,000
Weighted average interest rate of FHLB and FRB Short-term advances		0.36%
FRB [Member]
Debt [Line Items]
Additional available credit with the entity	1,080,000,000	$ 1,210,000,000
FHLB [Member]
Debt [Line Items]
Additional available credit with the entity	1,550,000,000	1,540,000,000
Lines of Credit with Correspondent Banks [Member]
Debt [Line Items]
Secured borrowing credit line	170,000,000
Outstanding balances on lines of credit	0	$ 0
Secured Credit Facility [Member]
Debt [Line Items]
Secured borrowing credit line	$ 25,000,000
Secured Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt [Line Items]
Spread on variable rate (percent)	1.50%
Unsecured Credit Facility [Member]
Debt [Line Items]
Secured borrowing credit line	$ 145,000,000

XML

Qualifying Debt - Subordinated Debt Details (Details) - USD ($)	Jun. 30, 2016	Jun. 16, 2016
Debt Instrument [Line Items]
Carrying value of subordinated debt	$ 325,800,000
Subordinated Debt [Member] | Subordinated Debentures Maturing July 2056 [Member]
Debt Instrument [Line Items]
Face amount of debt instrument		$ 175,000,000
Debt issuance cost		$ 5,500,000
Debt instrument interest rate (percent)		6.25%

XML

Qualifying Debt - Junior Subordinated Debt (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) Trust	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Number of statutory businesses formed or acquired | Trust	8
Carrying value of junior subordinated debt | $	$ 56.3	$ 58.4
Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Weighted average interest rate (percent)	2.99%	2.95%
London Interbank Offered Rate (LIBOR) [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Spread on variable rate (percent)	2.34%

XML

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015		Jun. 04, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from issuance of stock in offerings, net			$ 55,785	$ 0
Treasury stock acquired (shares)	2,735.000	1,888.000	293,167.000	254,781.000
Weighted average share price (in dollars per share)	$ 35.20	$ 31.11	$ 31.09	$ 27.27
Bridge Capital Holdings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period (shares)	0	0	0	0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (shares)	38,845		352,510
Value of shares granted	$ 1,500		$ 13,300
Compensation expense	$ 3,700	$ 2,600	$ 7,500	$ 5,100
Restricted Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (shares)	63,000		63,000
Restricted Stock [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (shares)			54,329
Value of shares granted			$ 1,700
Compensation expense	$ 100	100	$ 300	200
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (shares)			308,400
Performance Shares [Member] | 2014 and 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of shares granted			$ 10,400
Number of shares expected to pay out (shares)	409,800		409,800
Performance Shares [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of shares granted			$ 3,400
Compensation expense	$ 1,200	$ 1,000	$ 2,300	$ 2,000
Number of shares expected to pay out (shares)	109,704		109,704
Employee Stock Option [Member] | Bridge Capital Holdings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 200		$ 400
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued (shares)			1,550,000	12,997,000	[1]
Treasury stock acquired (shares)			293,000	255,000
Common Stock [Member] | Credit Suisse Securities (USA) LLC [Member] | Public Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate offering price (up to)	$ 100,000		$ 100,000			$ 100,000
Percent of gross offering proceeds (percent)						2.00%
Common stock, shares issued (shares)		0	1,600,000	0
Weighted average selling price (in dollars per share)	$ 36.63		$ 36.63
Proceeds from issuance of stock in offerings, net			$ 56,800
Total offering costs	$ 1,000		1,000
Payments of compensation costs	$ 900		$ 900

[1] Includes value of certain share-based awards replaced in connection with the acquisition.

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Accumulated Other Comprehensive Income - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 33,333	$ 39,538	$ 22,260	$ 32,948
SERP assumed in Bridge acquisition		337		337
Other comprehensive income before reclassifications	13,293	(13,134)	25,077	(6,175)
Amounts reclassified from accumulated other comprehensive income	0	(34)	(711)	(403)
Net other comprehensive income (loss)	13,293	(12,831)	24,366	(6,241)
Ending balance	46,626	26,707	46,626	26,707
Unrealized holding gains (losses) on AFS [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	20,301	23,279	9,993	16,495
SERP assumed in Bridge acquisition		0		0
Other comprehensive income before reclassifications	12,712	(8,378)	23,731	(1,225)
Amounts reclassified from accumulated other comprehensive income	0	(34)	(711)	(403)
Net other comprehensive income (loss)	12,712	(8,412)	23,020	(1,628)
Ending balance	33,013	14,867	33,013	14,867
Financial Liability Instruments, Fair Value Option [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	12,792	16,115	12,033	16,309
SERP assumed in Bridge acquisition		0		0
Other comprehensive income before reclassifications	575	(4,756)	1,334	(4,950)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive income (loss)	575	(4,756)	1,334	(4,950)
Ending balance	13,367	11,359	13,367	11,359
Impairment loss on securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	144	144	144	144
SERP assumed in Bridge acquisition		0		0
Other comprehensive income before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive income (loss)	0	0	0	0
Ending balance	144	144	144	144
Supplemental Employee Retirement Plan [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	96	0	90	0
SERP assumed in Bridge acquisition		337		337
Other comprehensive income before reclassifications	6	0	12	0
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive income (loss)	6	337	12	337
Ending balance	$ 102	$ 337	$ 102	$ 337

XML

Accumulated Other Comprehensive Income - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income	$ 0	$ 21	$ 290	$ 241
Amount reclassified from accumulated other comprehensive income	0	34	711	403
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income	0	34	711	403
Reclassification out of Accumulated Other Comprehensive Income [Member] | Realized Gain Loss On Sale Of Investment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized gains on sales of investment securities	0	55	1,001	644
Reclassification out of Accumulated Other Comprehensive Income [Member] | Income Tax Expense [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income	$ 0	$ (21)	$ (290)	$ (241)

XML

Derivatives and Hedging Activities Additional Information (Detail) - USD ($)	Jun. 30, 2016	Jun. 16, 2016	Dec. 31, 2015	Jun. 30, 2015
Derivative [Line Items]
Collateral netted against derivative liabilities	$ 107,100,000		$ 61,700,000	$ 46,700,000
Positive NPVs	107,097,000		64,785,000	49,037,000
Over collateralization net position	28,700,000		$ 15,500,000	$ 18,000,000
Additional collateral held in securities	135,800,000
Subordinated Debt [Member] | Fixed Rate Subordinated Debt [Member]
Derivative [Line Items]
Face amount of debt instrument	$ 150,000,000.0
Subordinated Debt [Member] | Fixed Rate Subordinated Debt [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative fixed interest rate (percent)	5.00%
Subordinated Debt [Member] | Fixed Rate Subordinated Debt [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative [Line Items]
Derivative spread on variable rate (percent)	3.16%
Subordinated Debt [Member] | Subordinated Debentures Maturing July 2056 [Member]
Derivative [Line Items]
Face amount of debt instrument		$ 175,000,000
Subordinated Debt [Member] | Subordinated Debentures Maturing July 2056 [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative fixed interest rate (percent)	6.25%
Subordinated Debt [Member] | Subordinated Debentures Maturing July 2056 [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative [Line Items]
Derivative spread on variable rate (percent)	3.25%

XML

Derivatives and Hedging Activities Fair Value of Derivative Contracts (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Derivatives, Fair Value [Line Items]
Notional Amount		$ 970,382	$ 800,478	$ 828,036
Derivative Asset, Fair Value		7,757	3,569	198
Derivative Liability, Fair Value		107,097	64,785	49,037
Notional Amount, Netting Adjustments	[1]	0	0	0
Derivative Netting Adjustments	[1]	0	0	0
Positive NPVs			3,569	198
Positive NPVs		107,097	64,785	49,037
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		970,382	800,478	828,036
Derivative Asset, Fair Value		7,757	3,569	198
Derivative Liability, Fair Value		$ 107,097	$ 64,785	$ 49,037

[1] Netting adjustments represent the amounts recorded to convert derivative balances from a gross basis to a net basis in accordance with the applicable accounting guidance.

XML

Derivatives and Hedging Activities Pre-Tax Net Gains (Losses) on Fair Value Hedges (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fixed Rate Loans [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	[1]	$ 7	$ 15	$ 7	$ 21
Fixed Rate Loans [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net Gain (Loss) on Derivatives	[1]	(18,115)	24,003	(42,312)	8,773
Increase (Decrease) to Basis of Hedged Assets	[1]	18,122	(23,988)	42,319	(8,752)
Fixed Rate Subordinated Debt [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net Gain (Loss) on Derivatives	[1]	3,024	198	4,189	198
Increase (Decrease) to Basis of Hedged Assets	[1]	(3,024)	(198)	(4,189)	(198)
Derivative, Net Hedge Ineffectiveness Gain (Loss)	[1]	$ 0	$ 0	$ 0	$ 0

[1] The fair value of derivatives contracts are carried as other assets and other liabilities in the Consolidated Balance Sheets. The effective portion of hedging gains (losses) is recorded as basis adjustments to the underlying hedged asset or liability. Gains and losses on both the hedging derivative and hedged item are recorded through non-interest income with a resulting net income impact for the amount of ineffectiveness.

XML

Derivatives and Hedging Activities Largest Exposure to Individual Counterparty (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Largest gross exposure (positive derivative NPV) to an individual counterparty		$ 3,569	$ 198
Largest individual counterparty [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Largest gross exposure (positive derivative NPV) to an individual counterparty	$ 7,556	3,569	198
Collateral posted by this counterparty	7,680	4,680	0
Negative derivative NPV with this counterparty	0	0	0
Collateral pledged to this counterparty	0	1,340	0
Net exposure after netting adjustments and collateral	$ 0	$ 229	$ 198

XML

Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Basic (shares)	102,688,000	88,177,000	102,294,000	88,059,000
Dilutive effect of stock awards (shares)	784,000	505,000	713,000	508,000
Weighted average shares diluted (shares)	103,472,000	88,682,000	103,007,000	88,567,000
Net income available to common shareholders	$ 61,614	$ 39,228	$ 122,946	$ 79,435
Earnings (loss) per share - basic (in dollars per share)	$ 0.60	$ 0.44	$ 1.20	$ 0.90
Earnings (loss) per share - diluted (in dollars per share)	$ 0.60	$ 0.44	$ 1.19	$ 0.90
Anti-dilutive stock options outstanding that were not included in computation of diluted earnings per common share (shares)	0	0	0	0

XML

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Effective income tax rate (percent)	29.94%	25.59%	27.16%	25.83%
Decreased deferred tax assets net			$ 21,100,000
Recognized net deferred tax asset	$ 65,275,000		65,275,000		$ 86,352,000
Deferred tax valuation allowance	0		0		0
Tax benefits related to federal NOLs	9,200,000		9,200,000		9,300,000
Unrecognized tax benefit that would impact effective tax rate , if recognized	700,000		700,000		700,000
Penalties recognized associated with unrecognized tax benefits	0	$ 0	0	$ 0
Interest recognized associated with unrecognized tax benefits	0	0	0	0
Accrued amounts for penalties	100,000		100,000		100,000
Accrued amounts for interest	100,000		100,000		100,000
Investment in Low Income Housing Tax Credit	171,500,000		171,500,000		152,700,000
Unfunded Low Income Housing Tax Credit Obligations	70,400,000		70,400,000		61,200,000
Amortization of Low Income Housing Tax Credits	3,800,000	$ 2,200,000	8,200,000	$ 5,600,000
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax asset related to federal and state NOL carryovers	$ 9,200,000		$ 9,200,000		$ 9,300,000

XML

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Loss Contingencies [Line Items]
Letters of credit expiration period			1 year
Percentage of first liens initial loan to value ratio (percent)			75.00%
Percent of commercial real estate loans owner occupied (percent)	36.00%		36.00%		48.00%
Rent expense	$ 2.8	$ 1.6	$ 5.3	$ 3.2
Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Credit Concentration Risk [Member]
Loss Contingencies [Line Items]
Percent of commercial real estate related loans (percent)			54.00%	49.00%
Unfunded Loan Commitment [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	10.8		$ 10.8		$ 3.3
GE Capital US Holdings, Inc. [Member] | Unfunded Loan Commitment [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	$ 7.0		$ 7.0

XML

Commitments and Contingencies - Summary of Contractual Amounts for Unfunded Commitments and Letters of Credit (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Commitments [Line Items]
Total contractual amount	$ 4,003,603	$ 3,733,203
Commitments to extend credit [Member]
Other Commitments [Line Items]
Total contractual amount	3,895,885	3,624,578
Unsecured loan commitments	353,644	341,374
Credit card guarantees [Member]
Other Commitments [Line Items]
Total contractual amount	54,270	57,966
Standby letters of credit [Member]
Other Commitments [Line Items]
Total contractual amount	53,448	50,659
Unsecured letters of credit	$ 10,380	$ 4,257

XML

Fair Value Accounting - Gains and Losses from Fair Value Changes Included in Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 1,005	$ (7,745)	$ 2,212	$ (8,059)
Interest Income on Securities	0	1	0	1
Interest Expense on Junior Subordinated Debt	693	451	1,373	892
Total Changes Included in Current-Period Earnings	692	443	1,367	879
Change in unrealized gain (loss) on TRUP securities, net of tax	575	(4,756)	1,334	(4,950)
Securities measured at fair value [Member]
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(1)	(9)	(6)	(14)
Interest Income on Securities	0	1	0	1
Interest Expense on Junior Subordinated Debt	0	0	0	0
Total Changes Included in Current-Period Earnings	(1)	(8)	(6)	(13)
Junior Subordinated Debt [Member]
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) in OCI	1,006	(7,736)	2,218	(8,045)
Interest Income on Securities	0	0	0	0
Interest Expense on Junior Subordinated Debt	693	451	1,373	892
Total Changes Included in Current-Period Earnings	693	451	1,373	892
Change in unrealized gain (loss) on TRUP securities, net of tax	$ 575	$ (4,756)	$ 1,334	$ (4,950)

XML

Fair Value Accounting - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended			12 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015	Dec. 31, 2015		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Positive NPVs		$ 107,097		$ 49,037	$ 107,097		$ 49,037	$ 64,785
Derivative assets				198			198	3,569
Balances of impaired financing receivables with charge-offs		33,900			33,900			37,800
Aggregate carrying amount of impaired loans		116,466			116,466			128,874
Impaired loans with an allowance recorded	[1]	20,695			20,695			24,287
Impaired loans with an allowance recorded	[2]	6,395			6,395			4,658
Repossessed Assets		49,842		$ 59,335	49,842		$ 59,335	43,942		$ 52,776	$ 63,759	$ 57,150
Other assets acquired through foreclosure		$ 49,800			$ 49,800			43,900
Collateralized debt obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities contained credit losses		0		0	0		0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate carrying amount of impaired loans	[3]	$ 76,200			$ 76,200			86,400
Impaired loans with an allowance recorded		20,700			20,700			24,300
Impaired loans with an allowance recorded		6,400			6,400			4,700
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Positive NPVs		107,097	[4]		107,097	[4]		64,785	[5]
Derivative assets		7,757	[4]		7,757	[4]		3,569	[5]
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Positive NPVs		107,097	[4]		107,097	[4]		64,785	[5]
Derivative assets	[4]	7,757			7,757
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Positive NPVs		0	[4]		0	[4]		0	[5]
Derivative assets		0	[4]		0	[4]		0	[5]
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded		14,300			14,300			19,629
Repossessed Assets		49,800			49,800
Other assets acquired through foreclosure		49,842			49,842			43,942
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded		0			0			0
Other assets acquired through foreclosure		0			0			0
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate carrying amount of impaired loans		76,169			76,169			86,383
Impaired loans with an allowance recorded		14,300			14,300			19,629
Other assets acquired through foreclosure		49,842			$ 49,842			$ 43,942
Junior Subordinated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period of basis point spread					5.51%			5.06%
Percentage of LIBOR					0.65%			0.61%
Carrying Amount [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Positive NPVs		107,097			$ 107,097			$ 64,785
Derivative assets		7,757			7,757			3,569
Carrying Amount [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Positive NPVs		106,503	[4]		106,503	[4]		64,184	[5]
Derivative assets		$ 7,757			$ 7,757			$ 3,569	[5]

[1] Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

[2] Includes valuation allowance related to TDR loans of $0.2 million and $0.3 million at June 30, 2016 and December 31, 2015, respectively.

[3] Excludes loan balances with charge-offs of $33.9 million and $37.8 million as of June 30, 2016 and December 31, 2015, respectively.

[4] Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a net positive value of $106,503 and the net carrying value of subordinated debt includes a net negative value of $7,757 as of June 30, 2016, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

[5] Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a positive value of $64,184 and the net carrying value of subordinated debt includes a net negative value of $3,569 as of December 31, 2015, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

XML

Fair Value Accounting - Fair Value of Assets and Liabilities (Detail) - USD ($) $ in Thousands		Jun. 30, 2016		Dec. 31, 2015		Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		$ 2,165,539		$ 1,982,523
Derivative assets				3,569		$ 198
Junior subordinated debt	[1]			46,928
Derivative liabilities		107,097		64,785		$ 49,037
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		2,165,539		1,982,523
Loans held-for-sale		22,336		23,809
Derivative assets		7,757	[2]	3,569	[3]
Junior subordinated debt		44,710
Derivative liabilities		107,097	[2]	64,785	[3]
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		147,210		148,914
Loans held-for-sale		0		0
Derivative assets		0	[2]	0	[3]
Junior subordinated debt		0		0	[1]
Derivative liabilities		0	[2]	0	[3]
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		2,008,146		1,823,549
Loans held-for-sale		22,336		23,809
Derivative assets	[2]	7,757
Junior subordinated debt		0		0	[1]
Derivative liabilities		107,097	[2]	64,785	[3]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		10,183		10,060
Loans held-for-sale		0		0
Derivative assets		0	[2]	0	[3]
Junior subordinated debt		44,710		46,928	[1]
Derivative liabilities		0	[2]	0	[3]
Fair Value, Measurements, Recurring [Member] | Residential mortgage-backed securities issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities measured at fair value		1,326		1,481
Securities available for sale		1,207,745		1,170,221
Fair Value, Measurements, Recurring [Member] | Residential mortgage-backed securities issued by GSEs | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities measured at fair value		0		0
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Residential mortgage-backed securities issued by GSEs | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities measured at fair value		1,326		1,481
Securities available for sale		1,207,745		1,170,221
Fair Value, Measurements, Recurring [Member] | Residential mortgage-backed securities issued by GSEs | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities measured at fair value		0		0
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Collateralized debt obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		10,183		10,060
Fair Value, Measurements, Recurring [Member] | Collateralized debt obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Collateralized debt obligations [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Collateralized debt obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		10,183		10,060
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		44,498		19,114
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		44,498		19,114
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		8,362		13,251
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		8,362		13,251
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | CRA investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		35,383		34,685
Fair Value, Measurements, Recurring [Member] | CRA investments [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		35,383		34,685
Fair Value, Measurements, Recurring [Member] | CRA investments [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | CRA investments [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		346,761		334,830
Fair Value, Measurements, Recurring [Member] | Municipal obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Municipal obligations [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		346,761		334,830
Fair Value, Measurements, Recurring [Member] | Municipal obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		109,276		111,236
Fair Value, Measurements, Recurring [Member] | Preferred Stock [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		109,276		111,236
Fair Value, Measurements, Recurring [Member] | Preferred Stock [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Preferred Stock [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Private label commercial mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		3,721		4,691
Fair Value, Measurements, Recurring [Member] | Private label commercial mortgage-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Private label commercial mortgage-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		3,721		4,691
Fair Value, Measurements, Recurring [Member] | Private label commercial mortgage-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Private label residential mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		339,355		257,128
Fair Value, Measurements, Recurring [Member] | Private label residential mortgage-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Private label residential mortgage-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		339,355		257,128
Fair Value, Measurements, Recurring [Member] | Private label residential mortgage-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Trust preferred securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		23,701		24,314
Fair Value, Measurements, Recurring [Member] | Trust preferred securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | Trust preferred securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		23,701		24,314
Fair Value, Measurements, Recurring [Member] | Trust preferred securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		34,003
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Agency Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Agency Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		34,003
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Agency Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		2,551		2,993
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		2,551		2,993
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0		0
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		$ 0		$ 0

[1] Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

[2] Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a net positive value of $106,503 and the net carrying value of subordinated debt includes a net negative value of $7,757 as of June 30, 2016, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

[3] Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a positive value of $64,184 and the net carrying value of subordinated debt includes a net negative value of $3,569 as of December 31, 2015, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

XML

Fair Value Accounting - Change in Level 3 Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		$ 0	$ 0	$ 0	$ 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		1,107	284	123	(641)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Junior subordinated debt	[1]					$ 46,928
Securities available for sale		2,165,539		2,165,539		1,982,523
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Junior subordinated debt		44,710		44,710
Securities available for sale		2,165,539		2,165,539		1,982,523
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Junior subordinated debt		44,710		44,710		46,928	[1]
Securities available for sale		10,183		10,183		10,060
Available-for-sale Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Securities available for sale		10,183		$ 10,183		$ 10,060
Junior subordinated debt, Valuation Technique				S&P Model		S&P Model
Junior subordinated debt, Significant Unobservable Inputs				Pricing indications from comparable securities		Pricing indications from comparable securities
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		9,076	10,520	$ 10,060	11,445	$ 11,445
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		10,183	10,804	10,183	10,804	$ 10,060
Junior Subordinated Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) in OCI		1,006	(7,736)	$ 2,218	(8,045)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Junior subordinated debt, Input Value				6.16%		5.67%
Junior Subordinated Debt [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Junior subordinated debt		44,710		$ 44,710		$ 46,928
Junior subordinated debt, Valuation Technique				Discounted cash flow		Discounted cash flow
Junior subordinated debt, Significant Unobservable Inputs				Implied credit rating of the Company		Adjusted Corporate Bond over Treasury Index with comparable credit spread
Junior Subordinated Debt [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance		(45,716)	(40,746)	$ (46,928)	(40,437)	$ (40,437)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	0	0
Closing balance		$ (44,710)	$ (48,482)	$ (44,710)	$ (48,482)	$ (46,928)

[1] Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

XML

Fair Value Accounting - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded	[1]	$ 20,695	$ 24,287
Impaired loans with no allowance recorded	[2]	95,771	104,587
Other assets acquired through foreclosure		49,800	43,900
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Aggregate carrying amount of impaired loans		116,466	128,874
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded		20,700	24,300
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Aggregate carrying amount of impaired loans	[3]	76,200	86,400
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded		14,300	19,629
Impaired loans with no allowance recorded	[3]	61,869	66,754
Other assets acquired through foreclosure		49,842	43,942
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded	[3]	0	0
Other assets acquired through foreclosure		0	0
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded		0	0
Impaired loans with no allowance recorded	[3]	0	0
Other assets acquired through foreclosure		0	0
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded		14,300	19,629
Impaired loans with no allowance recorded	[3]	61,869	66,754
Other assets acquired through foreclosure		49,842	43,942
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Aggregate carrying amount of impaired loans		$ 76,169	$ 86,383
Loans and Finance Receivables [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Discounted cash flow method	Discounted cash flow method
Loans and Finance Receivables [Member] | Collateral Method [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Collateral method	Collateral method
Loans and Finance Receivables [Member] | Third Party Appraisal [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Third party appraisal	Third party appraisal
Fair Value Measurements, Significant Assumptions		Costs to sell	Costs to sell
Loans and Finance Receivables [Member] | Third Party Appraisal [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, cost to sell (percent)		4.00%	4.00%
Loans and Finance Receivables [Member] | Third Party Appraisal [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, cost to sell (percent)		10.00%	10.00%
Loans and Finance Receivables [Member] | Discount Rate [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Discount rate	Discount rate
Fair Value Measurements, Significant Assumptions		Contractual loan rate	Contractual loan rate
Loans and Finance Receivables [Member] | Discount Rate [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, contractual loan rate (percent)		4.00%	4.00%
Loans and Finance Receivables [Member] | Discount Rate [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, contractual loan rate (percent)		7.00%	7.00%
Loans and Finance Receivables [Member] | Scheduled Cash Collections [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Scheduled cash collections	Scheduled cash collections
Fair Value Measurements, Significant Assumptions		Loss given default	Loss given default
Loans and Finance Receivables [Member] | Scheduled Cash Collections [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, loss given default (percent)		0.00%	0.00%
Loans and Finance Receivables [Member] | Scheduled Cash Collections [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, loss given default (percent)		20.00%	20.00%
Loans and Finance Receivables [Member] | Proceeds from Non-Real Estate Collateral [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Proceeds from non-real estate collateral	Proceeds from non-real estate collateral
Fair Value Measurements, Significant Assumptions		Loss given default	Loss given default
Loans and Finance Receivables [Member] | Proceeds from Non-Real Estate Collateral [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, loss given default (percent)		0.00%	0.00%
Loans and Finance Receivables [Member] | Proceeds from Non-Real Estate Collateral [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, loss given default (percent)		70.00%	70.00%
Other Assets [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Collateral method	Collateral method
Other Assets [Member] | Third Party Appraisal [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Junior subordinated debt, Valuation Technique		Third party appraisal	Third party appraisal
Fair Value Measurements, Significant Assumptions		Costs to sell	Costs to sell
Other Assets [Member] | Third Party Appraisal [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, cost to sell (percent)		4.00%	4.00%
Other Assets [Member] | Third Party Appraisal [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Measurements, Nonrecurring Value Measurement [Abstract]
Fair value assumptions, cost to sell (percent)		10.00%	10.00%

[1] Includes TDR loans of $0.6 million and $3.0 million at June 30, 2016 and December 31, 2015, respectively.

[2] Includes TDR loans of $68.6 million and $85.9 million at June 30, 2016 and December 31, 2015, respectively.

[3] Excludes loan balances with charge-offs of $33.9 million and $37.8 million as of June 30, 2016 and December 31, 2015, respectively.

XML

Fair Value Accounting - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands		Jun. 30, 2016		Dec. 31, 2015		Jun. 30, 2015
Financial assets
Investment securities - HTM, at amortized cost		$ 36,929		$ 0
Securities available for sale		2,165,539		1,982,523
Securities measured at fair value		1,326		1,481
Derivative assets				3,569		$ 198
Loans, net		12,733,407		10,993,786
Financial liabilities
Deposits		14,201,357		12,030,624
Customer repurchases		38,492		38,155
FHLB and FRB advances		0		150,000
Junior subordinated debt	[1]			46,928
Derivative liabilities		107,097		64,785		$ 49,037
Fair Value, Measurements, Recurring [Member]
Financial assets
Securities available for sale		2,165,539		1,982,523
Derivative assets		7,757	[2]	3,569	[3]
Financial liabilities
Junior subordinated debt		44,710
Derivative liabilities		107,097	[2]	64,785	[3]
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Financial assets
Securities available for sale		147,210		148,914
Derivative assets		0	[2]	0	[3]
Financial liabilities
Junior subordinated debt		0		0	[1]
Derivative liabilities		0	[2]	0	[3]
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Financial assets
Securities available for sale		2,008,146		1,823,549
Derivative assets	[2]	7,757
Financial liabilities
Junior subordinated debt		0		0	[1]
Derivative liabilities		107,097	[2]	64,785	[3]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Financial assets
Securities available for sale		10,183		10,060
Derivative assets		0	[2]	0	[3]
Financial liabilities
Junior subordinated debt		44,710		46,928	[1]
Derivative liabilities		0	[2]	0	[3]
Fair Value, Measurements, Recurring [Member] | Carrying Amount [Member]
Financial assets
Investment securities - HTM, at amortized cost		36,929
Securities available for sale		2,165,539		1,982,523
Securities measured at fair value		1,326		1,481
Derivative assets		7,757		3,569
Loans, net		12,755,743		11,017,595
Accrued interest receivable		60,432		54,445
Financial liabilities
Deposits		14,201,357		12,030,624
Customer repurchases		38,492		38,155
FHLB advances				150,000
Junior subordinated debt		382,103		210,328
Derivative liabilities		107,097		64,785
Accrued interest payable		14,368		13,626
Fair Value, Measurements, Recurring [Member] | Carrying Amount [Member] | Level 2 [Member]
Financial assets
Derivative assets		7,757		3,569	[3]
Financial liabilities
Derivative liabilities		106,503	[2]	64,184	[3]
Fair Value, Measurements, Recurring [Member] | Fair Value [Member]
Financial assets
Investment securities - HTM, at amortized cost		41,162
Securities available for sale		2,165,539		1,982,523
Securities measured at fair value		1,326		1,481
Derivative assets		7,757		3,569
Loans, net		12,612,616		10,853,209
Accrued interest receivable		60,432		54,445
Financial liabilities
Deposits		14,205,415		12,034,199
Customer repurchases		38,492		38,155
FHLB advances				150,000
Junior subordinated debt		372,447		207,437
Derivative liabilities		107,097		64,785
Accrued interest payable		14,368		13,626
Fair Value, Measurements, Recurring [Member] | Fair Value [Member] | Level 1 [Member]
Financial assets
Investment securities - HTM, at amortized cost		0
Securities available for sale		147,210		148,914
Securities measured at fair value		0		0
Derivative assets		0		0
Loans, net		0		0
Accrued interest receivable		0		0
Financial liabilities
Deposits		0		0
Customer repurchases		0		0
FHLB advances				0
Junior subordinated debt		0		0
Derivative liabilities		0		0
Accrued interest payable		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value [Member] | Level 2 [Member]
Financial assets
Investment securities - HTM, at amortized cost		41,162
Securities available for sale		2,008,146		1,823,549
Securities measured at fair value		1,326		1,481
Derivative assets		7,757		3,569
Loans, net		12,536,447		10,766,826
Accrued interest receivable		60,432		54,445
Financial liabilities
Deposits		14,205,415		12,034,199
Customer repurchases		38,492		38,155
FHLB advances				150,000
Junior subordinated debt		0		0
Derivative liabilities		107,097		64,785
Accrued interest payable		14,368		13,626
Fair Value, Measurements, Recurring [Member] | Fair Value [Member] | Level 3 [Member]
Financial assets
Investment securities - HTM, at amortized cost		0
Securities available for sale		10,183		10,060
Securities measured at fair value		0		0
Derivative assets		0		0
Loans, net		76,169		86,383
Accrued interest receivable		0		0
Financial liabilities
Deposits		0		0
Customer repurchases		0		0
FHLB advances				0
Junior subordinated debt		372,447		207,437
Derivative liabilities		0		0
Accrued interest payable		$ 0		$ 0

[1] Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.

[2] Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a net positive value of $106,503 and the net carrying value of subordinated debt includes a net negative value of $7,757 as of June 30, 2016, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

[3] Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans includes a positive value of $64,184 and the net carrying value of subordinated debt includes a net negative value of $3,569 as of December 31, 2015, which relates to the effective portion of the hedges put in place to mitigate against fluctuations in interest rates.

XML

Segments - Operating Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	[1]
Operating Statistics [Line Items]
Assets	$ 16,728,767		$ 16,728,767		$ 14,275,089
Cash, Cash Equivalents and Investment Securities	2,958,800		2,958,800		2,266,800
Loans, net of deferred loan fees and costs	12,877,800		12,877,800		11,136,700
Less: allowance for credit losses	(122,104)		(122,104)		(119,068)
Total loans held for investment	12,755,700		12,755,700		11,017,600
Intangible Assets, Net (Including Goodwill)	304,300		304,300		305,400
Other Assets Segment	660,200		660,200		641,400
Deposits	14,201,357		14,201,357		12,030,624
Other borrowings	382,100		382,100		360,300
Stockholders' equity	1,796,210	$ 1,514,743	1,796,210	$ 1,514,743	1,591,502	$ 1,000,928
Net interest income	163,686	108,718	309,397	211,826
Provision for credit losses	2,500	0	5,000	700
Net interest income after provision for credit losses	161,186	108,718	304,397	211,126
Non-interest income	8,559	5,545	21,692	11,787
Non-interest expense	(81,804)	(61,209)	(157,297)	(115,242)
Income before provision for income taxes	87,941	53,054	168,792	107,671
Income tax expense (benefit)	26,327	13,579	45,846	27,813
Net income	61,614	39,475	122,946	79,858
Other Repossessed Assets	49,800		49,800		43,900
Other Liabilities Segment	349,100		349,100		292,700
Total liabilities	14,932,557		14,932,557		12,683,587
Liabilities and Equity	16,728,767		16,728,767		14,275,089
Excess Funds Provided (Used) Segment Basis	0		0		0
Reportable Geographical Components [Member] | ARIZONA
Operating Statistics [Line Items]
Assets	2,920,700		2,920,700		2,836,200
Cash, Cash Equivalents and Investment Securities	2,400		2,400		2,300
Loans, net of deferred loan fees and costs	2,897,600		2,897,600		2,811,700
Less: allowance for credit losses	(30,900)		(30,900)		(30,100)
Total loans held for investment	2,866,700		2,866,700		2,781,600
Intangible Assets, Net (Including Goodwill)	0		0		0
Other Assets Segment	44,300		44,300		43,900
Deposits	3,801,400		3,801,400		2,880,700
Other borrowings	0		0		0
Stockholders' equity	337,600		337,600		309,200
Net interest income	41,204	32,091	79,660	61,076
Provision for credit losses	1,703	826	8,476	158
Net interest income after provision for credit losses	39,501	31,265	71,184	60,918
Non-interest income	888	1,008	4,569	1,947
Non-interest expense	(14,550)	(14,600)	(29,006)	(29,361)
Income before provision for income taxes	25,839	17,673	46,747	33,504
Income tax expense (benefit)	10,137	6,934	18,339	13,144
Net income	15,702	10,739	28,408	20,360
Other Repossessed Assets	7,300		7,300		8,400
Other Liabilities Segment	11,700		11,700		12,200
Total liabilities	3,813,100		3,813,100		2,892,900
Liabilities and Equity	4,150,700		4,150,700		3,202,100
Excess Funds Provided (Used) Segment Basis	1,230,000		1,230,000		365,900
Reportable Geographical Components [Member] | NEVADA
Operating Statistics [Line Items]
Assets	1,822,300		1,822,300		1,836,000
Cash, Cash Equivalents and Investment Securities	9,700		9,700		9,500
Loans, net of deferred loan fees and costs	1,727,000		1,727,000		1,737,200
Less: allowance for credit losses	(19,900)		(19,900)		(18,600)
Total loans held for investment	1,707,100		1,707,100		1,718,600
Intangible Assets, Net (Including Goodwill)	24,200		24,200		24,800
Other Assets Segment	60,300		60,300		62,300
Deposits	3,623,000		3,623,000		3,382,800
Other borrowings	0		0		0
Stockholders' equity	248,300		248,300		244,400
Net interest income	33,464	29,946	66,039	59,155
Provision for credit losses	(1,704)	(3,148)	(2,517)	(2,799)
Net interest income after provision for credit losses	35,168	33,094	68,556	61,954
Non-interest income	2,097	2,370	4,156	4,653
Non-interest expense	(14,824)	(15,032)	(29,570)	(29,506)
Income before provision for income taxes	22,441	20,432	43,142	37,101
Income tax expense (benefit)	7,855	7,151	15,100	12,985
Net income	14,586	13,281	28,042	24,116
Other Repossessed Assets	21,000		21,000		20,800
Other Liabilities Segment	28,600		28,600		29,000
Total liabilities	3,651,600		3,651,600		3,411,800
Liabilities and Equity	3,899,900		3,899,900		3,656,200
Excess Funds Provided (Used) Segment Basis	2,077,600		2,077,600		1,820,200
Reportable Geographical Components [Member] | Southern California [Member]
Operating Statistics [Line Items]
Assets	1,800,100		1,800,100		1,761,200
Cash, Cash Equivalents and Investment Securities	2,000		2,000		2,400
Loans, net of deferred loan fees and costs	1,801,200		1,801,200		1,761,900
Less: allowance for credit losses	(19,500)		(19,500)		(18,800)
Total loans held for investment	1,781,700		1,781,700		1,743,100
Intangible Assets, Net (Including Goodwill)	0		0		0
Other Assets Segment	16,400		16,400		15,700
Deposits	2,404,000		2,404,000		1,902,500
Other borrowings	0		0		0
Stockholders' equity	205,800		205,800		191,300
Net interest income	25,803	24,070	50,231	46,560
Provision for credit losses	220	633	250	266
Net interest income after provision for credit losses	25,583	23,437	49,981	46,294
Non-interest income	561	850	1,221	1,515
Non-interest expense	(10,635)	(11,858)	(21,869)	(23,479)
Income before provision for income taxes	15,509	12,429	29,333	24,330
Income tax expense (benefit)	6,522	5,227	12,335	10,231
Net income	8,987	7,202	16,998	14,099
Other Repossessed Assets	0		0		0
Other Liabilities Segment	9,300		9,300		7,800
Total liabilities	2,413,300		2,413,300		1,910,300
Liabilities and Equity	2,619,100		2,619,100		2,101,600
Excess Funds Provided (Used) Segment Basis	819,000		819,000		340,400
Reportable Geographical Components [Member] | Northern California [Member]
Operating Statistics [Line Items]
Assets	1,304,900		1,304,900		1,352,700
Cash, Cash Equivalents and Investment Securities	1,900		1,900		2,400
Loans, net of deferred loan fees and costs	1,139,500		1,139,500		1,188,400
Less: allowance for credit losses	(8,400)		(8,400)		(12,700)
Total loans held for investment	1,131,100		1,131,100		1,175,700
Intangible Assets, Net (Including Goodwill)	157,500		157,500		158,200
Other Assets Segment	14,100		14,100		16,100
Deposits	1,510,900		1,510,900		1,541,100
Other borrowings	0		0		0
Stockholders' equity	287,200		287,200		293,200
Net interest income	21,896	5,216	45,091	9,669
Provision for credit losses	926	513	1,968	486
Net interest income after provision for credit losses	20,970	4,703	43,123	9,183
Non-interest income	2,516	271	4,942	322
Non-interest expense	(13,481)	(1,913)	(27,448)	(3,930)
Income before provision for income taxes	10,005	3,061	20,617	5,575
Income tax expense (benefit)	4,206	1,287	8,669	2,344
Net income	5,799	1,774	11,948	3,231
Other Repossessed Assets	300		300		300
Other Liabilities Segment	9,800		9,800		11,200
Total liabilities	1,520,700		1,520,700		1,552,300
Liabilities and Equity	1,807,900		1,807,900		1,845,500
Excess Funds Provided (Used) Segment Basis	503,000		503,000		492,800
Operating Segments [Member] | HOA Services [Member]
Operating Statistics [Line Items]
Assets	97,500		97,500		87,700
Cash, Cash Equivalents and Investment Securities	0		0		0
Loans, net of deferred loan fees and costs	98,300		98,300		88,400
Less: allowance for credit losses	(1,100)		(1,100)		(900)
Total loans held for investment	97,200		97,200		87,500
Intangible Assets, Net (Including Goodwill)	0		0		0
Other Assets Segment	300		300		200
Deposits	1,711,300		1,711,300		1,291,900
Other borrowings	0		0		0
Stockholders' equity	43,600		43,600		34,200
Net interest income	9,909	6,436	18,541	12,204
Provision for credit losses	10	71	88	141
Net interest income after provision for credit losses	9,899	6,365	18,453	12,063
Non-interest income	110	80	215	153
Non-interest expense	(5,820)	(4,100)	(11,361)	(8,470)
Income before provision for income taxes	4,189	2,345	7,307	3,746
Income tax expense (benefit)	1,571	880	2,740	1,405
Net income	2,618	1,465	4,567	2,341
Other Repossessed Assets	0		0		0
Other Liabilities Segment	1,400		1,400		500
Total liabilities	1,712,700		1,712,700		1,292,400
Liabilities and Equity	1,756,300		1,756,300		1,326,600
Excess Funds Provided (Used) Segment Basis	1,658,800		1,658,800		1,238,900
Operating Segments [Member] | HFF Loan Portfolio [Member]
Operating Statistics [Line Items]
Assets	1,282,900		1,282,900
Cash, Cash Equivalents and Investment Securities	0		0
Loans, net of deferred loan fees and costs	1,262,800		1,262,800
Less: allowance for credit losses	(100)		(100)
Total loans held for investment	1,262,700		1,262,700
Intangible Assets, Net (Including Goodwill)	200		200
Other Assets Segment	20,000		20,000
Deposits	0		0
Other borrowings	0		0
Stockholders' equity	104,900		104,900
Net interest income	12,068		12,068
Provision for credit losses	0		0
Net interest income after provision for credit losses	12,068		12,068
Non-interest income	0		0
Non-interest expense	(2,557)		(2,557)
Income before provision for income taxes	9,511		9,511
Income tax expense (benefit)	3,567		3,567
Net income	5,944		5,944
Other Repossessed Assets	0		0
Other Liabilities Segment	15,000		15,000
Total liabilities	15,000		15,000
Liabilities and Equity	119,900		119,900
Excess Funds Provided (Used) Segment Basis	(1,163,000)		(1,163,000)
Operating Segments [Member] | Public and Non-Profit Finance [Member]
Operating Statistics [Line Items]
Assets	1,479,400		1,479,400		1,457,300
Cash, Cash Equivalents and Investment Securities	0		0		0
Loans, net of deferred loan fees and costs	1,481,400		1,481,400		1,458,900
Less: allowance for credit losses	(16,100)		(16,100)		(15,600)
Total loans held for investment	1,465,300		1,465,300		1,443,300
Intangible Assets, Net (Including Goodwill)	0		0		0
Other Assets Segment	14,100		14,100		14,000
Deposits	0		0		0
Other borrowings	0		0		0
Stockholders' equity	89,300		89,300		87,800
Net interest income	5,026	4,903	10,247	9,484
Provision for credit losses	175	1,469	(194)	2,106
Net interest income after provision for credit losses	4,851	3,434	10,441	7,378
Non-interest income	7	433	3	639
Non-interest expense	(1,929)	(1,384)	(3,953)	(2,637)
Income before provision for income taxes	2,929	2,483	6,491	5,380
Income tax expense (benefit)	1,098	932	2,434	2,018
Net income	1,831	1,551	4,057	3,362
Other Repossessed Assets	0		0		0
Other Liabilities Segment	105,500		105,500		63,800
Total liabilities	105,500		105,500		63,800
Liabilities and Equity	194,800		194,800		151,600
Excess Funds Provided (Used) Segment Basis	(1,284,600)		(1,284,600)		(1,305,700)
Operating Segments [Member] | Technology and Innovation [Member]
Operating Statistics [Line Items]
Assets	1,060,000		1,060,000		887,200
Cash, Cash Equivalents and Investment Securities	0		0		0
Loans, net of deferred loan fees and costs	943,500		943,500		770,300
Less: allowance for credit losses	(9,600)		(9,600)		(8,200)
Total loans held for investment	933,900		933,900		762,100
Intangible Assets, Net (Including Goodwill)	122,400		122,400		122,400
Other Assets Segment	3,700		3,700		2,700
Deposits	963,000		963,000		842,500
Other borrowings	0		0		0
Stockholders' equity	217,400		217,400		200,900
Net interest income	16,631	0	32,940	0
Provision for credit losses	(614)	0	(1,779)	0
Net interest income after provision for credit losses	17,245	0	34,719	0
Non-interest income	1,115	0	2,752	0
Non-interest expense	(7,434)	0	(14,340)	0
Income before provision for income taxes	10,926	0	23,131	0
Income tax expense (benefit)	4,097	0	8,674	0
Net income	6,829	0	14,457	0
Other Repossessed Assets	0		0		0
Other Liabilities Segment	0		0		0
Total liabilities	963,000		963,000		842,500
Liabilities and Equity	1,180,400		1,180,400		1,043,400
Excess Funds Provided (Used) Segment Basis	120,400		120,400		156,200
Operating Segments [Member] | Other National Business Lines
Operating Statistics [Line Items]
Assets	1,493,700		1,493,700		1,278,000
Cash, Cash Equivalents and Investment Securities	0		0		0
Loans, net of deferred loan fees and costs	1,498,600		1,498,600		1,280,300
Less: allowance for credit losses	(16,200)		(16,200)		(13,800)
Total loans held for investment	1,482,400		1,482,400		1,266,500
Intangible Assets, Net (Including Goodwill)	0		0		0
Other Assets Segment	11,300		11,300		11,500
Deposits	0		0		0
Other borrowings	0		0		0
Stockholders' equity	124,100		124,100		105,700
Net interest income	12,523	13,093	23,160	26,054
Provision for credit losses	1,699	(288)	1,937	413
Net interest income after provision for credit losses	10,824	13,381	21,223	25,641
Non-interest income	235	(192)	870	245
Non-interest expense	(3,598)	(4,061)	(7,035)	(7,716)
Income before provision for income taxes	7,461	9,128	15,058	18,170
Income tax expense (benefit)	2,798	3,423	5,647	6,814
Net income	4,663	5,705	9,411	11,356
Other Repossessed Assets	0		0		0
Other Liabilities Segment	36,400		36,400		40,800
Total liabilities	36,400		36,400		40,800
Liabilities and Equity	160,500		160,500		146,500
Excess Funds Provided (Used) Segment Basis	(1,333,200)		(1,333,200)		(1,131,500)
Corporate & Other
Operating Statistics [Line Items]
Assets	3,467,300		3,467,300		2,778,800
Cash, Cash Equivalents and Investment Securities	2,942,800		2,942,800		2,250,200
Loans, net of deferred loan fees and costs	27,900		27,900		39,600
Less: allowance for credit losses	(300)		(300)		(400)
Total loans held for investment	27,600		27,600		39,200
Intangible Assets, Net (Including Goodwill)	0		0		0
Other Assets Segment	475,700		475,700		475,000
Deposits	187,800		187,800		189,100
Other borrowings	382,100		382,100		360,300
Stockholders' equity	138,000		138,000		124,800
Net interest income	(14,838)	(7,037)	(28,580)	(12,376)
Provision for credit losses	85	(76)	(3,229)	(71)
Net interest income after provision for credit losses	(14,923)	(6,961)	(25,351)	(12,305)
Non-interest income	1,030	725	2,964	2,313
Non-interest expense	(6,976)	(8,261)	(10,158)	(10,143)
Income before provision for income taxes	(20,869)	(14,497)	(32,545)	(20,135)
Income tax expense (benefit)	(15,524)	(12,255)	(31,659)	(21,128)
Net income	(5,345)	$ (2,242)	(886)	$ 993
Other Repossessed Assets	21,200		21,200		14,400
Other Liabilities Segment	131,400		131,400		127,400
Total liabilities	701,300		701,300		676,800
Liabilities and Equity	839,300		839,300		801,600
Excess Funds Provided (Used) Segment Basis	$ (2,628,000)		$ (2,628,000)		$ (1,977,200)
Minimum [Member]
Operating Statistics [Line Items]
Equity capital allocation weight (percent)	0.00%		0.00%
Maximum [Member]
Operating Statistics [Line Items]
Equity capital allocation weight (percent)	12.00%		12.00%
Goodwill [Member]
Operating Statistics [Line Items]
Equity capital allocation weight (percent)	100.00%		100.00%

[1] As adjusted, see Treasury Shares section in "Note 1. Summary of Significant Accounting Policies" for further discussion.

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Mergers and Acquisitions - Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Apr. 20, 2016	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Total liabilities		$ 12,559	$ 12,559		$ 1,761,951
Goodwill		289,967	289,967	$ 289,638
GE Capital US Holdings, Inc. [Member]
Business Acquisition [Line Items]
Acquisition / restructure expenses related to purchase		$ 1,900	$ 1,900
Loans	$ 1,280,997
Other assets	3,560
Total assets	1,284,557
Other liabilities	12,559
Total liabilities	12,559
Net assets acquired	1,271,998
Cash	1,272,187
Goodwill	$ 189

XML

Mergers and Acquisitions - Business Combination, Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
GE Capital US Holdings, Inc. [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Interest income		$ 172,779	$ 133,247	$ 343,664	$ 260,838
Non-interest income		8,559	5,545	21,692	11,787
Net income available to common stockholders	[1]	$ 61,749	$ 38,234	$ 130,240	$ 97,449
Earnings per share - basic (dollars per share)		$ 0.60	$ 0.43	$ 1.27	$ 1.11
Earnings per share - diluted (dollars per share)		$ 0.60	$ 0.43	$ 1.26	$ 1.10
Bridge Capital Holdings [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Interest income			$ 139,080		$ 271,502
Non-interest income			1,840		11,047
Net income available to common stockholders	[1]		$ 45,607		$ 90,372
Earnings per share - basic (dollars per share)			$ 0.45		$ 0.89
Earnings per share - diluted (dollars per share)			$ 0.44		$ 0.88

[1] Excludes acquisition / restructure related costs incurred by the Company and by Bridge of $7.8 million and $8.0 million for the three and six months ended June 30, 2015, respectively, and acquisition / restructure related costs incurred by Bridge of $5.6 million and $6.8 million for the three and six months ended June 30, 2015, respectively, and related tax effects.

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Mergers and Acquisitions - Summary of Operating Results of Discontinued Operations (Detail) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Apr. 20, 2016 USD ($)	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 USD ($) shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 USD ($) shares	Dec. 31, 2015 shares
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Common stock, shares issued (shares) | shares			106,372,182		106,372,182		104,082,230
Measurement period adjustments identified					$ 1,500
Acquisition / restructure expense			$ 3,662	$ 7,842	$ 3,662	$ 8,001
GE Capital US Holdings, Inc. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	$ 1,272,187
Bridge Capital Holdings [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stock exchange ratio		0.8145
Additional cash consideration on stock exchange (dollars per share) | $ / shares		$ 2.39
Cash		$ 36,500
Common stock, shares issued (shares) | shares		12,500,000		12,500,000		12,500,000
Acquisition / restructure expense				$ 5,600		$ 6,800