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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Dividends declared per share (in dollars per share)	$ 0.47	$ 0.40
Retained Earnings
Dividends declared per share (in dollars per share)	$ 0.47	$ 0.40
Treasury stock issued for restricted awards, net of forfeitures (in shares)	75,608	89,351
Forfeitures of restricted stock (in shares)	37,592	22,094

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