Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (in dollars per share)	$ 0.22	$ 0.20
Treasury stock issued for restricted awards, net of forfeitures (in shares)	66,615	74,903
Forfeitures of restricted stock (in shares)	37,592	7,370