CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2013	$ 175,074	$ 174,719	$ 81,515	$ (41,665)	$ (39,495)
Balance, shares at Dec. 31, 2013		50,339,089
Net income	44,498		44,498
Comprehensive income (loss)	15,764			15,764
Stock option exercises, net value	162		(662)		824
Stock option exercises, net shares		80,000
Stock option expenses, net	13	$ 13
Restricted stock grants, value		$ (932)	(1,576)		2,508
Restricted stock grants, shares		241,969
Restricted stock forfeitures, value	(100)	$ 140	118		(358)
Restricted stock forfeitures, shares		(52,475)
Restricted stock amortization	236	$ 236
Treasury stock purchases	(598)				(598)
Treasury stock purchases, shares		(156,500)
Balance at Jun. 30, 2014	235,049	$ 174,176	123,893	(25,901)	(37,119)
Balance, shares at Jun. 30, 2014		50,452,083
Balance at Dec. 31, 2014	240,135	$ 174,385	128,512	(19,998)	(42,764)
Balance, shares at Dec. 31, 2014		49,239,004
Net income	7,811		7,811
Comprehensive income (loss)	(2,047)			(2,047)
Stock option exercises, net value	$ 26		(87)		113
Stock option exercises, net shares	13,000	13,000
Stock option expenses, net	$ 13	$ 13
Restricted stock grants, value		$ (694)	(444)		1,138
Restricted stock grants, shares		130,458
Restricted stock forfeitures, value	(34)	$ 6	12		(52)
Restricted stock forfeitures, shares		(8,091)
Restricted stock amortization	366	$ 366
Cash dividend payments	(984)		(984)
Treasury stock purchases	(8,824)				(8,824)
Treasury stock purchases, shares		(1,611,217)
Balance at Jun. 30, 2015	$ 236,462	$ 174,076	$ 134,820	$ (22,045)	$ (50,389)
Balance, shares at Jun. 30, 2015		47,763,154