CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Surplus [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2019	$ 503,652	$ 16,733	$ 319,375	$ (29,990)	$ 199,029	$ (1,495)
Net income	1,373				1,373
Other comprehensive loss	(2,164)					(2,164)
Restricted stock units issued		125	(125)
Restricted stock units/awards repurchased on vesting to pay taxes	(601)	(31)	(570)
Amortization of restricted stock awards/units	1,541		1,541
Cash dividends declared on common stock	(949)				(949)
Share repurchase	(6,487)			(6,487)
Common stock options exercised	75	4	71
Exercise of warrants		6	(6)
Issuance of common stock for acquisition		17	(17)
Balance at Mar. 31, 2020	496,440	16,854	320,269	(36,477)	199,453	(3,659)
Balance at Dec. 31, 2020	527,122	16,958	326,592	(36,477)	221,441	(1,392)
Net income	13,178				13,178
Other comprehensive loss	(12,372)					(12,372)
Restricted stock units issued		223	(223)
Restricted stock units/awards repurchased on vesting to pay taxes	(2,002)	(54)	(1,948)
Amortization of restricted stock awards/units	1,615		1,615
Cash dividends declared on common stock	(949)				(949)
Share repurchase	(4,379)			(4,379)
Common stock options exercised	10	1	9
Exercise of warrants		5	(5)
Issuance of shares for Employee Stock Purchase Plan	218	7	211
Balance at Mar. 31, 2021	$ 522,441	$ 17,140	$ 326,251	$ (40,856)	$ 233,670	$ (13,764)

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