Debt - Summary of Amounts Outstanding under the Credit Facility (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Net	$ 3,881	$ 4,806
Tranche A-1 and A-2 Loans [Member]
Line of Credit Facility [Line Items]
Debt, gross	300,000	300,000
Unamortized deferred financing costs, net	(3,048)	(2,871)
Mortgages payable, net	$ 296,952	297,129
Line of credit | Revolving credit facility
Line of Credit Facility [Line Items]
Interest Rate (1)	3.50%
Mortgages payable, net	$ 0	0
Letters of Credit Outstanding, Amount	$ 5,800	5,700
Line of Credit Facility, Commitment Fee Percentage	0.15%
Line of credit | Tranche A-1 Term Loan
Line of Credit Facility [Line Items]
Interest Rate (1)	3.32%
Debt, gross	$ 100,000	100,000
Derivative, Notional Amount	$ 100,000
Line of credit | Tranche A-2 Term Loan
Line of Credit Facility [Line Items]
Interest Rate (1)	4.34%
Debt, gross	$ 200,000	$ 200,000
Derivative, Notional Amount	$ 137,600