Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 19,920	$ 16,330	$ 20,020
Other comprehensive income:
Unrealized (loss) gain on securities (net of tax benefit of $415 in 2014 and $4,674 in 2013 and tax expense of $1,831 in 2012)	(601)	(6,768)	2,651
Reclassification adjustment for gains included in net income (net of tax expense of $421, $19 and $92 in 2014, 2013 and 2012, respectively)	(610)	(27)	(134)
Accretion of unrealized loss on securities reclassified to held-to-maturity (net of tax expense of $497 and $88 in 2014 and 2013, respectively)	721	127
Total other comprehensive (loss) income	(490)	(6,668)	2,517
Total comprehensive income	$ 19,430	$ 9,662	$ 22,537