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, 2013	$ 386,195	$ 1,811	$ 71,074	$ 357,083	$ (13,969)	$ (29,804)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,591	0	0	24,591	0	0
Other comprehensive income (loss)	11,644	0	0	0	11,644	0
Omnibus Equity Incentive Plan	843	3	840	0	0	0
Payments for Repurchase of Common Stock	(12,856)		0	0	0
Dividends, Common Stock, Cash	(6,544)	0	0	(6,544)	0	0
Balance at Sep. 30, 2014	403,873	1,814	71,914	375,130	(2,325)	(42,660)
Balance at Jun. 30, 2014	405,746	1,812	71,557	366,858	(4,320)	(30,161)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,272	0	0	8,272	0	0
Other comprehensive income (loss)	1,995	0	0	0	1,995	0
Omnibus Equity Incentive Plan	359	2	357	0	0	0
Payments for Repurchase of Common Stock	(12,499)	0	0	0	0
Balance at Sep. 30, 2014	403,873	1,814	71,914	375,130	(2,325)	(42,660)
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
Balance at Sep. 30, 2015	$ 408,591	$ 1,817	$ 72,916	$ 394,761	$ (8,758)	$ (52,145)