Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Retained Earnings [Member]
Cash dividend per share	$ 0.39	$ 0.39
Treasury Stock [Member]
Issued treasury shares to finance acquisition	8,282,296	660,998
Purchase of common stock, shares		373,594