Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash dividends per share (in dollars per share)	$ 0.52	$ 0.52	$ 0.52
Retained Earnings [Member]
Cash dividends per share (in dollars per share)	$ 0.52	$ 0.52	$ 0.52