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, 2019	$ 557,608	$ 2,005	$ 139,694	$ 492,055	$ (7,501)	$ (68,645)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	12,181	0	0	12,181	0	0
Other comprehensive income (loss)	13,502	0	0	0	13,502	0
Omnibus Equity Incentive Plan	204	0	204	0	0	0
Payments for Repurchase of Common Stock	(1,724)
Balance at Mar. 31, 2020	581,771	2,005	139,898	504,236	6,001	(70,369)
Balance at Dec. 31, 2020	596,992	2,007	140,820	521,103	9,764	(76,702)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	12,877	0	0	12,877	0	0
Other comprehensive income (loss)	(10,596)	0	0	0	(10,596)	0
Omnibus Equity Incentive Plan	205	1	204	0	0	0
Payments for Repurchase of Common Stock	(1,366)
Balance at Mar. 31, 2021	$ 598,112	$ 2,008	$ 141,024	$ 533,980	$ (832)	$ (78,068)