Fair Value Information (Tables)

12 Months Ended

Dec. 31, 2014

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 December 31, 2014 and 2013.

	Carrying Value at December 31, 2014		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	$	330,843	$	—	$	330,843	$	—
Residential mortgage-backed securities		1,917,496		—		1,917,496		—
CMO’s / REMIC’s —residential		304,091		—		304,091		—
Municipal bonds		579,641		—		579,641		—
Other securities		5,087		—		5,087		—
Total investment securities — AFS		3,137,158		—		3,137,158		—
Interest rate swaps		10,080		—		10,080		—
Total assets	$	3,147,238	$	—	$	3,147,238	$	—
Description of liability
Interest rate swaps	$	10,080	$	—	$	10,080	$	—
Total liabilities	$	10,080	$	—	$	10,080	$	—

	Carrying Value at December 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	$	326,525	$	—	$	326,525	$	—
Residential mortgage-backed securities		1,379,943		—		1,379,943		—
CMO’s / REMIC’s — residential		366,175		—		366,175		—
Municipal bonds		586,091		—		586,091		—
Other securities		4,908		—		4,908		—
Total investment securities —AFS		2,663,642		—		2,663,642		—
Interest rate swaps		10,846		—		10,846		—
Total assets	$	2,674,488	$	—	$	2,674,488	$	—
Description of liability
Interest rate swaps	$	10,846	$	—	$	10,846	$	—
Total liabilities	$	10,846	$	—	$	10,846	$	—

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

the following tables provide the level of valuation assumptions used to determine each adjustment and the carrying value of the related assets that had losses during the period.

	Carrying Value  at December 31, 2014		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, 2014
	(Dollars in thousands)
Description of assets
Impaired loans, excluding PCI loans:
Commercial and industrial	$	1,911	$	—	$	—	$	1,911	$	771
SBA		1,327		—		—		1,327		296
Real estate:
Commercial real estate		2,500		—		—		2,500		271
Construction		—		—		—		—		—
SFR mortgage		—		—		—		—		—
Dairy & livestock and agribusiness		103		—		—		103		1,061
Consumer and other loans		482		—		—		482		447
Other real estate owned		—		—		—		—		—
Total assets	$	6,323	$	—	$	—	$	6,323	$	2,846

	Carrying Value  at December 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 Year Ended December 31, 2013
	(Dollars in thousands)
Description of assets
Impaired loans, excluding PCI loans:
Commercial and industrial	$	529	$	—	$	—	$	529	$	627
Real estate:
Commercial real estate		—		—		—		—		—
Construction		—		—		—		—		—
SFR mortgage		—		—		—		—		—
Dairy & livestock and agribusiness		11,899		—		—		11,899		2,096
Consumer and other loans		2		—		—		2		2
Other real estate owned		504		—		—		504		434
Total assets	$	12,934	$	—	$	—	$	12,934	$	3,159

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.

	December 31, 2014
	Carrying Amount		Estimated Fair Value
			Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets
Total cash and cash equivalents	$	105,768	$	105,768	$	—	$	—	$	105,768
Interest-earning balances due from depository institutions		27,118		—		27,118		—		27,118
FHLB stock		25,338		—		25,338		—		25,338
Investment securities available-for-sale		3,137,158		—		3,137,158		—		3,137,158
Investment securities held-to-maturity		1,528		—		—		2,177		2,177
Loans held-for-sale		—		—		—		—		—
Total loans, net of allowance for loan losses		3,757,242		—		—		3,794,454		3,794,454
Accrued interest receivable		23,194		—		23,194		—		23,194
Swaps		10,080		—		10,080		—		10,080
Liabilities
Deposits:
Noninterest-bearing	$	2,866,365	$	2,866,365	$	—	$	—	$	2,866,365
Interest-bearing		2,738,293		—		2,739,221		—		2,739,221
Borrowings		809,106		—		822,607		—		822,607
Junior subordinated debentures		25,774		—		26,005		—		26,005
Accrued interest payable		1,161		—		1,161		—		1,161
Swaps		10,080		—		10,080		—		10,080

	December 31, 2013
	Carrying Amount		Estimated Fair Value
			Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets
Total cash and cash equivalents	$	94,693	$	94,693	$	—	$	—	$	94,693
Interest-earning balances due from depository institutions		70,000		—		70,000		—		70,000
FHLB stock		32,331		—		32,331		—		32,331
Investment securities available-for-sale		2,663,642		—		2,663,642		—		2,663,642
Investment securities held-to-maturity		1,777		—		—		2,296		2,296
Loans held-for-sale		3,667		—		—		8,897		8,897
Total loans, net of allowance for loan losses		3,470,996		—		—		3,527,725		3,527,725
Accrued interest receivable		22,051		—		22,051		—		22,051
Swaps		10,846		—		10,846		—		10,846
Liabilities
Deposits:
Noninterest-bearing	$	2,562,980	$	2,562,980	$	—	$	—	$	2,562,980
Interest-bearing		2,327,651		—		2,328,488		—		2,328,488
Borrowings		911,457		—		932,408		—		932,408
Junior subordinated debentures		25,774		—		25,819		—		25,819
Accrued interest payable		1,111		—		1,111		—		1,111
Swaps		10,846		—		10,846		—		10,846