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	23,082	0	0	23,082	0	0
Other comprehensive income (loss)	5,771	0	0	0	5,771	0
Omnibus Equity Incentive Plan	513	2	511	0	0	0
Payments for Repurchase of Common Stock	(8,698)		0	0	0
Dividends, Common Stock, Cash	(6,291)	0	0	(6,291)	0	0
Balance at Sep. 30, 2015	408,591	1,817	72,916	394,761	(8,758)	(52,145)
Balance at Jun. 30, 2015	399,058	1,816	72,746	386,363	(14,048)	(47,819)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,398	0	0	8,398	0	0
Other comprehensive income (loss)	5,290	0	0	0	5,290	0
Omnibus Equity Incentive Plan	171	1	170	0	0	0
Payments for Repurchase of Common Stock	(4,326)	0	0	0	0
Dividends, Common Stock, Cash	0			0
Balance at Sep. 30, 2015	408,591	1,817	72,916	394,761	(8,758)	(52,145)
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	30,069	0	0	30,069	0	0
Other comprehensive income (loss)	6,989	0	0	0	6,989	0
Omnibus Equity Incentive Plan	513	2	511	0	0	0
Payments for Repurchase of Common Stock	(19,396)		0	0	0
Dividends, Common Stock, Cash	(6,117)	0	0	(6,117)	0	0
Balance at Sep. 30, 2016	422,374	1,819	73,907	419,585	(2,412)	(70,525)
Balance at Jun. 30, 2016	413,224	1,818	73,737	411,423	(3,493)	(70,261)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,162	0	0	8,162	0	0
Other comprehensive income (loss)	1,081	0	0	0	1,081	0
Omnibus Equity Incentive Plan	171	1	170	0	0	0
Payments for Repurchase of Common Stock	(264)	0	0	0	0
Dividends, Common Stock, Cash	0			0
Balance at Sep. 30, 2016	$ 422,374	$ 1,819	$ 73,907	$ 419,585	$ (2,412)	$ (70,525)