Quarterly Results of Operations and Selected Cash Flow Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Results of Operations

	2014
(Dollars in thousands, except per share data)	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	137,276		$	133,793		$	119,514		$	114,232
Total interest expense		12,596			12,042			10,241			9,824
Net interest income		124,680			121,751			109,273			104,408
Provision for loan losses		6,495			5,714			4,748			2,103
Net interest income after provision for loan losses		118,185			116,037			104,525			102,305
Gain on sale of investments, net		164			582			8			19
Other noninterest income		46,908			46,530			43,753			35,662
Noninterest expense		119,382			120,360			127,309			107,428
Income before income taxes		45,875			42,789			20,977			30,558
Income tax expense		9,939			11,897			4,750			8,163
Net income	$	35,936		$	30,892		$	16,227		$	22,395
Preferred stock dividends		—			—			—			—
Income available to common shareholders		35,936			30,892			16,227			22,395
Earnings allocated to unvested restricted stock		(530	)		(465	)		(258	)		(405	)
Earnings available to common shareholders - Diluted	$	35,406		$	30,427		$	15,969		$	21,990
Earnings per share - Basic	$	1.08		$	0.93		$	0.53		$	0.75
Earnings per share - Diluted		1.07			0.92			0.53			0.75
Cash dividends declared per common share		0.34			0.34			0.34			0.34
	2013
	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	114,092		$	108,512		$	108,177		$	106,416
Total interest expense		10,654			11,060			11,695			13,545
Net interest income		103,438			97,452			96,482			92,871
(Reversal of) Provision for loan losses		4,700			2,014			1,807			(3,377	)
Net interest income after (reversal of) provision for loan losses		98,738			95,438			94,675			96,248
Gain (loss) on sale of investments, net		19			13			(57	)		2,359
Other noninterest income		38,696			43,250			42,546			42,132
Noninterest expense		102,674			108,152			117,361			144,898
Income (loss) before income taxes		34,779			30,549			19,803			(4,159	)
Income tax expense (benefit)		9,175			7,357			4,213			(4,876	)
Net income	$	25,604		$	23,192		$	15,590		$	717
Preferred stock dividends		—			—			—			—
Income available to common shareholders		25,604			23,192			15,590			717
Earnings allocated to unvested restricted stock		(456	)		(425	)		(293	)		(20	)
Earnings available to common shareholders - Diluted	$	25,148		$	22,767		$	15,297		$	697
Earnings per share - Basic	$	0.86		$	0.78		$	0.53		$	0.02
Earnings per share - Diluted		0.86			0.78			0.53			0.02
Cash dividends declared per common share		0.34			0.34			0.34			0.34

Schedule of Error Corrections and Prior Period Adjustments Effect on Statements of Comprehensive Income

The following table presents the effect this error correction and purchase accounting adjustments had on the reported consolidated statements of comprehensive income for the periods indicated:

			Adjustment
(Dollars in thousand, except per share data)	As Previously Reported		Error Correction			Purchase Accounting			As Adjusted
Three Months Ended June 30, 2014
Net interest income	$	108,979	$	—		$	294		$	109,273
Non-interest income		47,963		(4,189	)		(13	)		43,761
Non-interest expense		127,375		(170	)		104			127,309
Income tax expense		6,271		(1,656	)		135			4,750
Net income		18,548		(2,363	)		42			16,227
Earnings per share - basic		0.60		(0.07	)		—			0.53
Earnings per share - diluted		0.60		(0.07	)		—			0.53
Three Months Ended September 30, 2014
Net interest income	$	121,041	$	—		$	710		$	121,751
Non-interest income		45,663		1,487			(38	)		47,112
Non-interest expense		120,060		170			130			120,360
Income tax expense		11,186		521			190			11,897
Net income		29,744		796			352			30,892
Earnings per share - basic		0.89		0.03			0.01			0.93
Earnings per share - diluted		0.89		0.02			0.01			0.92