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, 2016	$ 414,395	$ 1,820	$ 74,525	$ 421,826	$ (14,164)	$ (69,612)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,369	0	0	9,369	0	0
Other comprehensive income (loss)	3,371	0	0	0	3,371	0
Omnibus Equity Incentive Plan	176	0	176	0	0	0
Payments for Repurchase of Common Stock	(503)	0	0	0	0
Dividends, Common Stock, Cash	0	0	0	0	0	0
Balance at Mar. 31, 2017	426,808	1,820	74,701	431,195	(10,793)	(70,115)
Balance at Dec. 31, 2017	413,569	1,822	75,624	420,275	(14,704)	(69,448)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,953	0	0	8,953	0	0
Other comprehensive income (loss)	(7,418)	0	0	0	(7,418)	0
Omnibus Equity Incentive Plan	187	1	186	0	0	0
Payments for Repurchase of Common Stock	(391)	0	0	0	0
Dividends, Common Stock, Cash	0	0	0	0	0	0
Balance at Mar. 31, 2018	$ 414,900	$ 1,823	$ 75,810	$ 431,594	$ (24,488)	$ (69,839)