CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2014	$ 394,214	$ 1,815	$ 72,405	$ 377,970	$ (14,529)	$ (43,447)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,684	0	0	14,684	0	0
Other comprehensive income (loss)	481	0	0	0	481	0
Omnibus Equity Incentive Plan	342	1	341	0	0	0
Payments for Repurchase of Common Stock	(4,372)		0	0	0
Dividends, Common Stock, Cash	(6,291)	0	0	(6,291)	0	0
Balance at Jun. 30, 2015	399,058	1,816	72,746	386,363	(14,048)	(47,819)
Balance at Mar. 31, 2015	409,027	1,815	72,576	385,731	(7,303)	(43,792)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,923	0	0	6,923	0	0
Other comprehensive income (loss)	(6,745)	0	0	0	(6,745)	0
Omnibus Equity Incentive Plan	171	1	170	0	0	0
Payments for Repurchase of Common Stock	(4,027)	0	0	0	0
Dividends, Common Stock, Cash	(6,291)			(6,291)
Balance at Jun. 30, 2015	399,058	1,816	72,746	386,363	(14,048)	(47,819)
Balance at Dec. 31, 2015	410,316	1,817	73,396	395,633	(9,401)	(51,129)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,907	0	0	21,907	0	0
Other comprehensive income (loss)	5,908	0	0	0	5,908	0
Omnibus Equity Incentive Plan	342	1	341	0	0	0
Payments for Repurchase of Common Stock	(19,132)		0	0	0
Dividends, Common Stock, Cash	(6,117)	0	0	(6,117)	0	0
Balance at Jun. 30, 2016	413,224	1,818	73,737	411,423	(3,493)	(70,261)
Balance at Mar. 31, 2016	411,912	1,818	73,566	409,308	(5,059)	(67,721)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,232	0	0	8,232	0	0
Other comprehensive income (loss)	1,566	0	0	0	1,566	0
Omnibus Equity Incentive Plan	171	0	171	0	0	0
Payments for Repurchase of Common Stock	(2,540)	0	0	0	0
Dividends, Common Stock, Cash	(6,117)			(6,117)
Balance at Jun. 30, 2016	$ 413,224	$ 1,818	$ 73,737	$ 411,423	$ (3,493)	$ (70,261)