Subsequent Events (Details) (USD $)			9 Months Ended	0 Months Ended
	Sep. 30, 2014	Oct. 28, 2014 Subsequent Event	Sep. 30, 2014 Line of Credit	Oct. 28, 2014 Line of Credit Subsequent Event
Subsequent Event [Line Items]
Revolving credit facility borrowing capacity	$ 500,000,000	$ 650,000,000
Debt instrument, description of variable rate basis			LIBOR plus 107.5 basis points	LIBOR plus 92.5 basis points
Basis spread on variable rate			1.075%	0.925%