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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Forfeiture of restricted stock award grants (in shares)	361	2,482
Restricted stock award grants (in shares)	40,108	39,673	52,570
Issuance of common stock, net of issuance costs (in shares)		834,896
Purchase of treasury stock (in shares)	97,206	75,162	1,298
Reissue of treasury stock (in shares)			7,933
Cash dividends declared (in dollars per share)	$ 0.67	$ 0.66	$ 0.66

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