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Note 25 - Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

		2015
(dollars in thousands except per share data)		Fourth Quarter				Third Quarter				Second Quarter				First Quarter
Total interest income		$	67,311			$	63,981			$	62,423			$	59,465
Total interest expense			4,735				4,896				4,873				4,734
Net interest income			62,576				59,085				57,550				54,731
Provision for credit losses			4,595				3,262				3,471				3,310
Net interest income after provision for credit losses			57,981				55,823				54,079				51,421
Noninterest income			6,492				6,099				6,233				7,804
Noninterest expense			28,640				27,405				26,598				28,073
Income before income tax expense			35,833				34,517				33,714				31,152
Income tax expense			13,485				13,054				12,776				11,734
Net income			22,348				21,463				20,938				19,418
Preferred stock dividends and discount accretion			62				180				179				180
Net income available to common shareholders		$	22,286			$	21,283			$	20,759			$	19,238
Earnings per common share
Basic (1)		$	0.67			$	0.64			$	0.62			$	0.62
Diluted (1)		$	0.65			$	0.63			$	0.61			$	0.61

		2014
(dollars in thousands except per share data)		Fourth Quarter				Third Quarter				Second Quarter				First Quarter
Total interest income		$	56,091			$	47,886			$	44,759			$	42,837
Total interest expense			4,275				3,251				2,739				2,830
Net interest income			51,816				44,635				42,020				40,007
Provision for credit losses			3,700				2,111				3,134				1,934
Net interest income after provision for credit losses			48,116				42,524				38,886				38,073
Noninterest income			5,310				4,761				3,811				4,463
Noninterest expense			29,352				25,143				22,135				23,098
Income before income tax expense			24,074				22,142				20,562				19,438
Income tax expense			9,347				8,054				7,618				6,939
Net income			14,727				14,088				12,944				12,499
Preferred stock dividends and discount accretion			180				151				142				141
Net income available to common shareholders		$	14,547			$	13,937			$	12,802			$	12,358
Earnings per common share
Basic (1)		$	0.51			$	0.54			$	0.49			$	0.48
Diluted (1)		$	0.49			$	0.52			$	0.48			$	0.47

		2013
(dollars in thousands except per share data)		Fourth Quarter				Third Quarter				Second Quarter				First Quarter
Total interest income		$	41,652			$	39,724			$	37,985			$	37,933
Total interest expense			2,938				3,021				3,121				3,424
Net interest income			38,714				36,703				34,864				34,509
Provision for credit losses			2,508				1,372				2,357				3,365
Net interest income after provision for credit losses			36,206				35,331				32,507				31,144
Noninterest income			4,304				5,236				7,065				8,111
Noninterest expense			21,524				21,673				20,685				20,697
Income before income tax expense			18,986				18,894				18,887				18,558
Income tax expense			6,983				7,137				7,212				6,986
Net income			12,003				11,757				11,675				11,572
Preferred stock dividends and discount accretion			141				142				142				141
Net income available to common shareholders		$	11,862			$	11,615			$	11,533			$	11,431
Earnings per common share
Basic (1 & 2)		$	0.46			$	0.45			$	0.45			$	0.45
Diluted (1 & 2)		$	0.45			$	0.44			$	0.44			$	0.44