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, 2017	$ 413,569	$ 1,822	$ 75,624	$ 420,275	$ (14,704)	$ (69,448)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,214	0	0	24,214	0	0
Other comprehensive income (loss)	(11,819)	0	0	0	(11,819)	0
Omnibus Equity Incentive Plan	372	1	371	0	0	0
Payments for Repurchase of Common Stock	(391)		0	0	0
Dividends, Common Stock, Cash	(6,250)	0	0	(6,250)	0	0
Balance at Jun. 30, 2018	419,695	1,823	75,995	440,605	(28,889)	(69,839)
Balance at Mar. 31, 2018	414,900	1,823	75,810	431,594	(24,488)	(69,839)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,261	0	0	15,261	0	0
Other comprehensive income (loss)	(4,401)	0	0	0	(4,401)	0
Omnibus Equity Incentive Plan	185	0	185	0	0	0
Dividends, Common Stock, Cash	(6,250)			(6,250)
Balance at Jun. 30, 2018	419,695	1,823	75,995	440,605	(28,889)	(69,839)
Balance at Dec. 31, 2018	442,701	1,824	76,774	456,716	(23,454)	(69,159)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,251	0	0	22,251	0	0
Other comprehensive income (loss)	19,172	0	0	0	19,172	0
Omnibus Equity Incentive Plan	401	2	399	0	0	0
Payments for Repurchase of Common Stock	(315)		0	0	0
Dividends, Common Stock, Cash	(6,390)	0	0	(6,390)	0	0
Balance at Jun. 30, 2019	477,820	1,826	77,173	472,577	(4,282)	(69,474)
Balance at Mar. 31, 2019	462,796	1,825	76,974	466,398	(12,927)	(69,474)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,569	0	0	12,569	0	0
Other comprehensive income (loss)	8,645	0	0	0	8,645	0
Omnibus Equity Incentive Plan	200	1	199	0	0	0
Dividends, Common Stock, Cash	(6,390)			(6,390)
Balance at Jun. 30, 2019	$ 477,820	$ 1,826	$ 77,173	$ 472,577	$ (4,282)	$ (69,474)