Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Treasury Stock	Additional paid in capital	Retained earnings	Accumulated other comprehensive income (loss)
Balance at Dec. 31, 2012	$ 235,745	$ 0	$ 181	$ (1,743)	$ 173,299	$ 56,218	$ 7,790
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,104	0	0	0	0	33,104	0
Other comprehensive income	(12,170)	0	0	0	0	0	(12,170)
Cash dividends paid on common shares, $0.21 per share	3,946	0	0	0	0	(3,946)	0
Repurchase of preferred stock	1,006	0	0	0	(1,006)	0	0
Issuance under equity compensation plans, net	2,265	0	1	0	2,264	0	0
Trust preferred securities conversion	20,443	0	12	0	20,431	0	0
Share-based compensation	5,048	0	0	0	5,048	0	0
Excess tax benefit related to equity compensation plans	222	0	0	0	222	0	0
Balance at Dec. 31, 2013	279,705	0	194	(1,743)	200,258	85,376	(4,380)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,173	0	0	0	0	27,173	0
Other comprehensive income	6,061	0	0	0	0	0	6,061
Cash dividends paid on common shares, $0.21 per share	4,176	0	0	0	0	4,176	0
Issuance under equity compensation plans, net	(679)	0	2	0	(681)	0	0
Trust preferred securities conversion	5,002	0	3	0	4,999	0	0
Share-based compensation	2,950	0	0	0	2,950	0	0
Excess tax benefit related to equity compensation plans	205	0	0	0	205	0	0
Balance at Dec. 31, 2014	316,241	0	199	(1,743)	207,731	108,373	1,681
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,450	0	0	0	0	38,450	0
Other comprehensive income	(1,463)
Reclassification adjustment for realized gain on sale of securities included in net income, net of tax	(1,463)	0	0	0	0	0	1,463
Cash dividends paid on common shares, $0.21 per share	5,259	0	0	0	0	(5,259)	0
Issuance under equity compensation plans, net	(1,190)	0	2	0	(1,192)	0	0
Share-based compensation	3,601	0	0	0	3,601	0	0
Excess tax benefit related to equity compensation plans	449	0	0	0	449	0	0
Balance at Dec. 31, 2015	$ 350,829	$ 0	$ 201	$ (1,743)	$ 210,589	$ 141,564	$ 218