Fair Value Information (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The tables below presents the balances of assets and liabilities measured at fair value on a recurring basis as of March 31, 2013 and December 31, 2012.

Assets and Liabilities Measured at Fair Value on a Recurring Basis
	Carrying Value at March 31, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(Dollars in thousands)
Description of assets
Investment securities - AFS:
Government agency	$	390,638	$	—	$	390,638	$	—
Residential mortgage-backed securities		892,637		—		892,637		—
CMO’s / REMIC’s - residential		477,577		—		477,577		—
Municipal bonds		624,799		—		624,799		—
Other securities		5,022				5,022
Total investment securities - AFS		2,390,673		—		2,390,673		—
Interest rate swaps		21,358		—		21,358		—
Total assets	$	2,412,031	$	—	$	2,412,031	$	—
Description of liability
Interest rate swaps	$	21,358	$	—	$	21,358	$	—
Total liabilities	$	21,358	$	—	$	21,358	$	—

	Carrying Value at December 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(Dollars in thousands)
Description of assets
Investment securities - AFS:
Government agency	$	359,300	$	—	$	359,300	$	—
Residential mortgage-backed securities		887,598		—		887,598		—
CMO’s / REMIC’s - residential		571,960		—		571,960		—
Municipal bonds		625,429		—		625,429		—
Other securities		5,100				5,100
Total investment securities - AFS		2,449,387		—		2,449,387		—
Interest rate swaps		23,966		—		23,966		—
Total assets	$	2,473,353	$	—	$	2,473,353	$	—
Description of liability
Interest rate swaps	$	23,966	$	—	$	23,966	$	—
Total liabilities	$	23,966	$	—	$	23,966	$	—

Assets and Liabilities Measured at Fair Value on Non-Recurring Basis

For assets measured at fair value on a non-recurring basis that were still held on the balance sheet at March 31, 2013 and December 31, 2012, respectively, the following tables provide the level of valuation assumptions used to determine each adjustment and the carrying value of the related assets for investments with losses during the period.

	Carrying Value at March 31, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Losses for the Three Months Ended March 31, 2013
	(Dollars in thousands)
Description of assets
Impaired loans-non-covered	$	4,169	$	—	$	—	$	4,169	$	(2,164	)
OREO-non-covered		828		—		—		828		(73	)
OREO-covered		—		—		—		—		—
Total assets	$	4,997	$	—	$	—	$	4,997	$	(2,237	)

	Carrying Value at December 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Losses for the Year Ended December 31, 2012
	(Dollars in thousands)
Description of assets
Impaired loans-non-covered	$	12,460	$	—	$	—	$	12,460	$	(3,930	)
OREO-non-covered		3,008		—		—		3,008		(336	)
OREO-covered		1,067		—		—		1,067		(467	)
Total assets	$	16,535	$	—	$	—	$	16,535	$	(4,733	)

Estimated Fair Value of Financial Instruments

The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

	March 31, 2013
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets
Total cash and cash equivalents	$	135,278	$	135,278	$	—	$	—	$	135,278
Interest-earning balances due from depository institutions		70,000		—		70,000		—		70,000
FHLB stock		50,981		—		50,981		—		50,981
Investment securities available-for-sale		2,390,673		—		2,390,673		—		2,390,673
Investment securities held-to-maturity		1,975		—		—		2,425		2,425
Total loans, net of allowance for credit losses		3,275,990		—		—		3,394,235		3,394,235
Accrued interest receivable		22,985		—		22,985		—		22,985
Swaps		21,358		—		21,358		—		21,358
Liabilities
Deposits:
Noninterest-bearing	$	2,366,719	$	2,366,719	$	—	$	—	$	2,366,719
Interest-bearing		2,319,442		—		2,320,514		—		2,320,514
Borrowings		699,117		—		727,065		—		727,065
Junior subordinated debentures		46,393		—		46,649		—		46,649
Accrued interest payable		1,306		—		1,306		—		1,306
Swaps		21,358		—		21,358		—		21,358

	December 31, 2012
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets
Total cash and cash equivalents	$	98,431	$	98,431	$	—	$	—	$	98,431
Interest-earning balances due from depository institutions		70,000		—		70,000		—		70,000
FHLB stock		56,651		—		56,651		—		56,651
Investment securities available-for-sale		2,449,387		—		2,449,387		—		2,449,387
Investment securities held-to-maturity		2,050		—		—		2,515		2,515
Total loans, net of allowance for credit losses		3,355,087		—		—		3,503,332		3,503,332
Accrued interest receivable		22,355		—		22,355		—		22,355
Swaps		23,966		—		23,966		—		23,966
Liabilities
Deposits:
Noninterest-bearing	$	2,420,993	$	2,420,993	$	—	$	—	$	2,420,993
Interest-bearing		2,352,994		—		2,354,126		—		2,354,126
Borrowings		698,178		—		727,512		—		727,512
Junior subordinated debentures		67,012		—		67,415		—		67,415
Accrued interest payable		1,493		—		1,493		—		1,493
Swaps		23,966		—		23,966		—		23,966