Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 5,165	$ 4,968	$ 14,988	$ 14,392
Other comprehensive income:
Unrealized loss on securities (net of tax benefit of $100 and $386 in 2014 and $1,498 and $4,859 in 2013)	(144)	(2,169)	(558)	(7,035)
Accretion of unrealized loss on securities reclassified to held-to-maturity (net of tax expense of $142 and $375 in 2014)	206		542
Reclassification adjustment for gains included in net income (net of tax expense of $241 and $383 in 2014 and $17 in 2013)	(349)		(554)	(25)
Total comprehensive income	$ 4,878	$ 2,799	$ 14,418	$ 7,332