Consolidated Statement of Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Dividends, per share (in dollars per share)	$ 0.13	$ 0.12	$ 0.26	$ 0.24