Fair Value Accounting and Measurement (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial Assets And Liabilities Accounted For Fair Value On Recurring Basis

The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at March 31, 2017 and December 31, 2016 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement:

	Fair value		Fair Value Measurements at Reporting Date Using
			Level 1		Level 2		Level 3
March 31, 2017	(in thousands)
Assets
Securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	1,486,498	$	—	$	1,486,498	$	—
State and municipal debt securities	487,355		—		487,355		—
U.S. government agency and government-sponsored enterprise securities	352,183		—		352,183		—
U.S. government securities	252		252		—		—
Other securities	5,071		—		5,071		—
Total securities available for sale	$	2,331,359	$	252	$	2,331,107	$	—
Other assets (Interest rate contracts)	$	8,598	$	—	$	8,598	$	—
Liabilities
Other liabilities (Interest rate contracts)	$	8,618	$	—	$	8,618	$	—

	Fair value		Fair Value Measurements at Reporting Date Using
			Level 1		Level 2		Level 3
December 31, 2016	(in thousands)
Assets
Securities available for sale:
U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations	$	1,465,732	$	—	$	1,465,732	$	—
State and municipal debt securities	475,060		—		475,060		—
U.S. government agency and government-sponsored enterprise securities	331,902		—		331,902		—
U.S. government securities	800		800		—		—
Other securities	5,083		—		5,083		—
Total securities available for sale	$	2,278,577	$	800	$	2,277,777	$	—
Other assets (Interest rate contracts)	$	9,012	$	—	$	9,012	$	—
Liabilities
Other liabilities (Interest rate contracts)	$	9,036	$	—	$	9,036	$	—

Financial Assets Accounted For Fair Value On Nonrecurring Basis

The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods:

	Fair value at March 31, 2017		Fair Value Measurements at Reporting Date Using						Losses During the Three Months Ended March 31, 2017
			Level 1		Level 2		Level 3
	(in thousands)
OREO	$	1,260	$	—	$	—	$	1,260	$	193
	$	1,260	$	—	$	—	$	1,260	$	193

	Fair value at March 31, 2016		Fair Value Measurements at Reporting Date Using						Losses During the Three Months Ended March 31, 2016
			Level 1		Level 2		Level 3
	(in thousands)
Impaired loans	$	10,681	$	—	$	—	$	10,681	$	2,676
OREO	2,553		—		—		2,553		137
	$	13,234	$	—	$	—	$	13,234	$	2,813

Fair Value, by Balance Sheet Grouping

The following tables summarize carrying amounts and estimated fair values of selected financial instruments as well as assumptions used by the Company in estimating fair value at March 31, 2017 and December 31, 2016:

	March 31, 2017
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	169,697	$	169,697	$	169,697	$	—	$	—
Interest-earning deposits with banks	13,124		13,124		13,124		—		—
Securities available for sale	2,331,359		2,331,359		252		2,331,107		—
FHLB stock	10,600		10,600		—		10,600		—
Loans held for sale	3,245		3,245		—		3,245		—
Loans	6,157,115		6,042,895		—		—		6,042,895
FDIC loss-sharing asset	3,239		921		—		—		921
Interest rate contracts	8,598		8,598		—		8,598		—
Liabilities
Deposits	$	8,088,827	$	8,084,550	$	7,699,879	$	384,671	$	—
FHLB advances	15,483		16,110		—		16,110		—
Repurchase agreements	46,914		47,099		—		47,099		—
Interest rate contracts	8,618		8,618		—		8,618		—

	December 31, 2016
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
	(in thousands)
Assets
Cash and due from banks	$	193,038	$	193,038	$	193,038	$	—	$	—
Interest-earning deposits with banks	31,200		31,200		31,200		—		—
Securities available for sale	2,278,577		2,278,577		800		2,277,777		—
FHLB stock	10,240		10,240		—		10,240		—
Loans held for sale	5,846		5,846		—		5,846		—
Loans	6,143,380		6,040,439		—		—		6,040,439
FDIC loss-sharing asset	3,535		867		—		—		867
Interest rate contracts	9,012		9,012		—		9,012		—
Liabilities
Deposits	$	8,059,415	$	8,055,168	$	7,653,122	$	402,046	$	—
FHLB advances	6,493		7,070		—		7,070		—
Repurchase agreements	80,822		81,131		—		81,131		—
Interest rate contracts	9,036		9,036		—		9,036		—

Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value Inputs, Assets, Quantitative Information

The range and weighted-average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets, along with the valuation techniques used, are shown in the following table:

	Fair value at March 31, 2017		Valuation Technique	Unobservable Input	Range (Weighted Average) (1)
	(dollars in thousands)
OREO	$	1,260	Fair Market Value of Collateral	Adjustment to Appraisal Value	N/A (2)
(1) Discount applied to appraisal value.
(2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values.

	Fair value at March 31, 2016		Valuation Technique	Unobservable Input	Range (Weighted Average) (1)
	(dollars in thousands)
Impaired loans	$	10,681	Fair Market Value of Collateral	Adjustment to Stated Value	0% - 7% (6%)
OREO	$	2,553	Fair Market Value of Collateral	Adjustment to Appraisal Value	N/A (2)
(1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable, inventory and equipment).
(2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values.