Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Principal Amount	$ 670,000	$ 550,000
Deferred Loan Fees	(4,164)	(4,406)
Carrying Value	665,836	545,594
Senior unsecured notes payable
Debt Instrument [Line Items]
Principal Amount	300,000	300,000
Deferred Loan Fees	(3,142)	(3,331)
Carrying Value	296,858	296,669
Senior unsecured term loan
Debt Instrument [Line Items]
Principal Amount	200,000	200,000
Deferred Loan Fees	(1,022)	(1,075)
Carrying Value	198,978	198,925
Unsecured revolving credit facility
Debt Instrument [Line Items]
Principal Amount	170,000	50,000
Deferred Loan Fees	0	0
Carrying Value	$ 170,000	$ 50,000