Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Repurchased common stock shares		3,305	2,120
Common stock issued in public stock offering, Shares	6,325
Retained Earnings [Member]
Cash dividends declared, per common share	$ 0.96	$ 0.96	$ 0.96