Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash dividend per share (unaudited)	$ 0.46	$ 0.41
Percentage of stock dividend (unaudited)		100.00%
Common Stock [Member]
Percentage of stock dividend (unaudited)		100.00%
Retained Earnings [Member]
Cash dividend per share (unaudited)	$ 0.46	$ 0.41
Percentage of stock dividend (unaudited)		100.00%