Debt - Deferred Financing Costs, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Financing costs	$ 17,803		$ 17,803		$ 23,145
Less: accumulated amortization	(4,986)		(4,986)		(12,241)
Total deferred financing costs, net	12,817		12,817		10,904
Amortization of deferred financing costs	1,300	$ 1,100	2,600	$ 2,400
Unsecured term loan facility | Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Net deferred financing costs	$ 3,400		$ 3,400		$ 4,500