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Note 23 - Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

		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

		2012
(dollars in thousands except per share data)		Fourth Quarter				Third Quarter				Second Quarter				First Quarter
Total interest income		$	38,164			$	36,636			$	34,575			$	32,568
Total interest expense			3,427				3,328				3,561				4,098
Net interest income			34,737				33,308				31,014				28,470
Provision for credit losses			4,139				3,638				4,443				3,970
Net interest income after provision for credit losses			30,598				29,670				26,571				24,500
Noninterest income			6,060				4,851				4,441				6,012
Noninterest expense			20,325				19,107				18,537				18,562
Income before income tax expense			16,333				15,414				12,475				11,950
Income tax expense			6,135				5,739				4,692				4,317
Net income			10,198				9,675				7,783				7,633
Preferred stock dividends and discount accretion			141				142				142				141
Net income available to common shareholders		$	10,057			$	9,533			$	7,641			$	7,492
Earnings per common share
Basic (1 & 2)		$	0.40			$	0.41			$	0.34			$	0.34
Diluted (1 & 2)		$	0.39			$	0.40			$	0.33			$	0.33