Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
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