Estimated Fair Values (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Estimated Fair Values For Certain Financial Assets And Financial Liabilities

For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of June 30, 2013, December 31, 2012, and June 30, 2012. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk relating to them that would cause the fair value to differ from the carrying value.

	June 30, 2013				December 31, 2012				June 30, 2012
	Carrying value		Fair value		Carrying value		Fair value		Carrying value		Fair value
	(dollars in thousands)
Cash and due from banks	$	542,645	$	542,645	$	639,730	$	639,730	$	571,004	$	571,004
Overnight investments	1,039,925		1,039,925		443,180		443,180		984,536		984,536
Investment securities available for sale	5,184,976		5,184,976		5,226,228		5,226,228		4,634,248		4,634,248
Investment securities held to maturity	1,130		1,200		1,342		1,448		1,578		1,714
Loans held for sale	62,497		64,262		86,333		87,654		76,374		78,139
Acquired loans, net of allowance for loan and lease losses	1,366,802		1,339,466		1,669,263		1,635,878		1,911,554		1,873,323
Originated loans, net of allowance for loan and lease losses	11,473,687		11,317,282		11,397,069		11,238,597		11,277,326		11,200,523
Receivable from the FDIC for loss share agreements (1)	158,013		71,353		270,192		100,161		405,626		297,963
Income earned not collected	45,567		45,567		47,666		47,666		49,743		49,743
Stock issued by:
Federal Home Loan Bank of Atlanta	28,788		28,788		36,139		36,139		38,105		38,105
Federal Home Loan Bank of San Francisco	8,061		8,061		10,107		10,107		11,746		11,746
Federal Home Loan Bank of Seattle	4,330		4,330		4,410		4,410		4,490		4,490
Preferred stock	41,665		42,898		40,768		40,793		—		—
Deposits	18,018,015		18,049,241		18,086,025		18,126,893		17,801,646		17,854,346
Short-term borrowings	581,937		581,937		568,505		568,505		700,299		700,299
Long-term obligations	443,313		463,244		444,921		472,642		644,682		677,372
Payable to the FDIC for loss share agreements	101,652		117,891		101,641		125,065		91,648		110,373
Accrued interest payable	9,208		9,208		9,353		9,353		23,093		23,093
Interest rate swap	8,196		8,196		10,398		10,398		11,020		11,020

⁽¹⁾ The fair value of the FDIC receivable excludes receivable related to accretable yield to be amortized in prospective periods.

Assets And Liabilities Carried At Fair Value On A Recurring Basis

For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of June 30, 2013, December 31, 2012, and June 30, 2012:

			Fair value measurements using:
Description	Fair value		Level 1		Level 2		Level 3
	(dollars in thousands)
June 30, 2013
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	598,666	$	598,666	$	—	$	—
Government agency	2,721,379		2,721,379		—		—
Mortgage-backed securities	1,843,323		—		1,843,323		—
Equity securities	20,593		20,593		—		—
State, county, municipal	187		—		187		—
Other	828		828		—		—
Total	$	5,184,976	$	3,340,638	$	1,843,510	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	8,196	$	—	$	8,196	$	—
December 31, 2012
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	823,632	$	823,632	$	—	$	—
Government agency	3,055,204		3,055,204		—		—
Mortgage-backed securities	1,329,657		—		1,329,657		—
Equity securities	16,365		16,365		—		—
State, county, municipal	550		—		550		—
Other	820		820		—		—
Total	$	5,226,228	$	3,895,201	$	1,330,207	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	10,398	$	—	$	10,398	$	—
June 30, 2012
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	878,685	$	878,685	$	—	$	—
Government agency	2,978,198		2,978,198		—		—
Corporate bonds	50,446		50,446		—		—
Mortgage-backed securities	707,645		—		707,645		—
Equity securities	18,238		18,238		—		—
State, county, municipal	1,036		—		1,036		—
Total	$	4,634,248	$	3,925,567	$	708,681	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	11,020	$	—	$	11,020	$	—

Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis

For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of June 30, 2013, December 31, 2012, and June 30, 2012.

			Fair value measurements using:
Description	Fair value		Level 1		Level 2		Level 3
	(dollars in thousands)
June 30, 2013
Loans held for sale	$	42,084	$	—	$	42,084	$	—
Originated impaired loans	42,940		—		—		42,940
Other real estate not covered under loss share agreements remeasured during current year	534		—		—		534
December 31, 2012
Loans held for sale	65,244		—		65,244		—
Originated impaired loans	51,644		—		—		51,644
Other real estate not covered under loss share agreements remeasured during current year	21,113		—		—		21,113
June 30, 2012
Loans held for sale	49,277		—		49,277		—
Originated impaired loans	82,865		—		—		82,865
Other real estate not covered under loss share agreements remeasured during current year	12,893		—		—		12,893

Schedule of Fair Value Measurements Of Other Real Estate Opportunities

OREO is measured and reported at fair value using level 3 inputs for valuations based on unobservable criteria. The values of OREO are determined by collateral valuations. Collateral values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 10 and 14 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Changes to the value of the assets between scheduled valuation dates are monitored through continued communication with brokers and monthly reviews by the asset manager assigned to each asset. The asset manager uses the information gathered from brokers and other market sources to identify any significant changes in the market or the subject property as they occur. Valuations are then adjusted or new appraisals are ordered to ensure the reported values reflect the most current information.

No financial liabilities were carried at fair value on a nonrecurring basis as of June 30, 2013, December 31, 2012, or June 30, 2012.