Consolidated Statements of Changes in Shareholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Restricted Stock	Restricted Stock Treasury Stock	Performance Based Restricted Stock Awards	Performance Based Restricted Stock Awards Treasury Stock
Beginning balance at Dec. 31, 2019	$ 304,966	$ 0	$ 99,335	$ 201,503	$ (2,811)	$ 6,939
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,059			17,059
Other comprehensive loss (income)	9,659					9,659
Restricted stock award grants	0		(892)		892
Performance based restricted stock award grants	0		(217)		217
Stock-based compensation expense	835		835
Issuance of common stock, net of issuance costs	3,313		3,313
Purchase of treasury stock							$ (212)	$ (212)	$ (113)	$ (113)
Cash dividends declared	(5,235)			(5,235)
Ending balance at Jun. 30, 2020	330,272	0	102,374	213,327	(2,027)	16,598
Beginning balance at Mar. 31, 2020	324,802	0	102,128	207,698	(2,026)	17,002
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,246			8,246
Other comprehensive loss (income)	(404)					(404)
Stock-based compensation expense	286		286
Issuance of common stock, net of issuance costs	(40)		(40)
Purchase of treasury stock							(1)	(1)
Cash dividends declared	(2,617)			(2,617)
Ending balance at Jun. 30, 2020	330,272	0	102,374	213,327	(2,027)	16,598
Beginning balance at Dec. 31, 2020	416,137	57,785	127,518	218,727	(2,967)	15,074
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,171			28,171
Other comprehensive loss (income)	(7,130)					(7,130)
Forfeiture of restricted stock award grants	0		35		(35)
Restricted stock award grants	0		(1,228)		1,228
Performance based restricted stock award grants	0		(262)		262
Stock-based compensation expense	812		812
Purchase of treasury stock							(140)	(140)	$ (20)	$ (20)
Preferred cash dividend declared	(2,150)			(2,150)
Cash dividends declared	(5,731)			(5,731)
Ending balance at Jun. 30, 2021	429,949	57,785	126,875	239,017	(1,672)	7,944
Beginning balance at Mar. 31, 2021	417,603	57,785	126,572	228,973	(1,671)	5,944
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,990			13,990
Other comprehensive loss (income)	2,000					2,000
Stock-based compensation expense	303		303
Purchase of treasury stock							$ (1)	$ (1)
Preferred cash dividend declared	(1,075)			(1,075)
Cash dividends declared	(2,871)			(2,871)
Ending balance at Jun. 30, 2021	$ 429,949	$ 57,785	$ 126,875	$ 239,017	$ (1,672)	$ 7,944