Condensed 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)	Parent [Member]
Balance at Dec. 31, 2013		$ 0	$ 194	$ (1,743)	$ 200,258	$ 85,376	$ (4,380)	$ 279,705
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 21,206	0	0	0	0	21,206	0	21,206
Other comprehensive loss	4,147	0	0	0	0	0	4,147	4,147
Cash dividends paid on common shares, $0.183 per share		0	0	0	0	(3,130)	0	(3,130)
Payments of Ordinary Dividends, Common Stock	3,130
Issuance under equity compensation plans, net		0	2	0	(484)	0	0	(482)
Issuance of common stock, net	(482)
Trust preferred securities conversion		0	3	0	4,999	0	0	5,002
Share-based compensation		0	0	0	2,205	0	0	2,205
Share-based compensation	2,205
Excess tax benefit related to equity compensation plans		0	0	0	101	0	0	101
Excess tax benefit of share-based compensation	101
Balance at Sep. 30, 2014		0	199	(1,743)	207,079	103,452	(233)	308,754
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	27,771	0	0	0	0	27,771	0	27,771
Other comprehensive loss	1,292	0	0	0	0	0	1,292	1,292
Cash dividends paid on common shares, $0.183 per share		0	0	0	0		0	(3,654)
Payments of Ordinary Dividends, Common Stock	3,654
Issuance under equity compensation plans, net		0	1	0	(832)	0	0
Issuance of common stock, net	(831)
Share-based compensation		0	0	0		0	0	2,588
Share-based compensation	2,588
Excess tax benefit related to equity compensation plans		0	0	0		0	0	156
Excess tax benefit of share-based compensation	156
Balance at Sep. 30, 2015	$ 343,563	$ 0	$ 200	$ (1,743)	$ 209,643	$ 132,490	$ 2,973	$ 343,563