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)
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
Other comprehensive income	1,292	0	0	0	0	0	1,292
Cash dividends paid on common shares	(3,654)	0	0	0	0	3,654	0
Issuance under equity compensation plans, net	(831)	0	(1)	0	832	0	0
Share-based Compensation	2,588	0	0	0	2,588	0	0
Excess tax benefit related to equity compensation plans	156	0	0	0	156	0	0
Balance at Sep. 30, 2015	343,563	0	200	(1,743)	209,643	132,490	2,973
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	35,209	0	0	0	0	35,209	0
Other comprehensive income	4,450	0	0	0	0	0	4,450
Cash dividends paid on common shares	(6,005)	0	0	0	0	6,005	0
Adjustments To Additional Paid In Capital, Repurchase Of Common Stock Warrants	(4,889)	0	0	(4,889)	0	0	0
Issuance under equity compensation plans, net	(1,650)	0	(2)	0	1,652	0	0
Share-based Compensation	2,410	0	0	0	2,410	0	0
Excess tax benefit related to equity compensation plans	744	0	0	0	744	0	0
Balance at Sep. 30, 2016	$ 381,098	$ 0	$ 203	$ (6,632)	$ 212,091	$ 170,768	$ 4,668