Consolidated Statements of Changes in Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Forfeiture of restricted stock award grants (in shares)			1,578
Contribution of treasury stocks (in shares)	3,000		3,000
Restricted stock award grants (in shares)	2,203	1,808	52,309	36,968
Performance-based restricted stock award (in shares)			10,587	8,351
Issuance of common stock, net of issuance costs (in shares)		0		115,790
Purchase of treasury stock (in shares)		66,000		66,000
Cash dividends declared (in dollars per share)	$ 0.17	$ 0.17	$ 0.51	$ 0.51
Restricted Stock
Purchase of treasury stock (in shares)	28		6,691	7,267
Performance Based Restricted Stock Awards
Purchase of treasury stock (in shares)			941	3,458

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