Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (in dollars per share)	$ 0.4	$ 0.38
Treasury stock issued for restricted awards, net of forfeitures (in shares)	89,351	110,643
Forfeitures of restricted stock (in shares)	22,094	4,659