Subsequent Events (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Subsequent Event [Line Items]
Dividends declared per share (usd per share)	$ 0.28	$ 0.27	$ 0.83	$ 0.79