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Consolidated Statements of Changes in Shareholders’ Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Dividends per share (in usd per share)	$ 0.15	$ 0.13	$ 0.45	$ 0.38
Issuance of stock to acquire Hamilton Bancorp, Inc. (in shares)			1,765,704
Common shares issued during the period (in shares)	48,694	30,321	15,845	45,302
Issuance of treasury stock (in shares)		15,251
Treasury stock, shares acquired (in shares)	45,505		36,474	6,714
Compensation expense, issuance of stock	$ 475	$ 188	$ 1,154	$ 1,112

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