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, 2014		$ 0	$ 199	$ (1,743)	$ 207,731	$ 108,373	$ 1,681	$ 316,241
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 18,062	0	0	0	0	18,062	0	18,062
Other comprehensive income	(432)	0	0	0	0	0	(432)	(432)
Cash dividends paid on common shares, $0.19 per share	2,252	0	0	0	0	(2,252)	0	(2,252)
Issuance under equity compensation plans, net	1,080	0	1	0	(1,081)	0	0	(1,080)
Share-based Compensation	1,738	0	0	0	1,738	0	0	1,738
Excess tax benefit related to equity compensation plans	(153)	0	0	0	153	0	0	153
Balance at Jun. 30, 2015		0	200	(1,743)	208,541	124,183	1,249	332,430
Balance at Dec. 31, 2015	350,829	0	201	(1,743)	210,589	141,564	218
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,377	0	0	0	0	23,377	0	23,377
Other comprehensive income	5,299	0	0	0	0	0	5,299	5,299
Cash dividends paid on common shares, $0.19 per share	3,804	0	0	0	0			(3,804)
Adjustments To Additional Paid In Capital, Repurchase Of Common Stock Warrants		0	0	(4,711)	0	0	0	(4,711)
Issuance under equity compensation plans, net	1,811	0	1	0	(1,812)	0	0
Share-based Compensation	1,626	0	0	0		0	0	1,626
Excess tax benefit related to equity compensation plans	(824)	0	0	0		0	0	824
Balance at Jun. 30, 2016	$ 371,629	$ 0	$ 202	$ (6,454)	$ 211,227	$ 161,137	$ 5,517	$ 371,629