Subsequent Events - Narrative (Details) - $ / shares				3 Months Ended			6 Months Ended
	Aug. 25, 2017	Aug. 11, 2017	Jul. 28, 2017	Jun. 30, 2017	Jun. 30, 2016	[1]	Jun. 30, 2017	Jun. 30, 2016	[1]
Subsequent Event [Line Items]
Dividends declared per share (in dollars per share)				$ 0.11	$ 0.11		$ 0.22	$ 0.22
Subsequent Event
Subsequent Event [Line Items]
Date of announcement of dividend			Jul. 28, 2017
Dividends declared per share (in dollars per share)			$ 0.11
Date of payment of dividend	Aug. 25, 2017
Date of record of dividend		Aug. 11, 2017

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