Credit Facilities - Term Loan Facilities - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Nov. 26, 2019
Line of Credit Facility [Line Items]
Borrowings under revolving credit facility	$ 200,000,000.0			$ 69,000,000	$ 119,000,000
Total deferred finance costs, net		$ 2,500,000		2,500,000		$ 3,800,000
Interest expense recorded from amortization of deferred financing costs		200,000	$ 400,000	$ 300,000	1,000,000.0
Annual interest rate				1.43%		3.00%
Interest Rate Swaps
Line of Credit Facility [Line Items]
Annual interest rate				1.68%		3.22%
November 2019 Term Loan
Line of Credit Facility [Line Items]
Borrowings under revolving credit facility				$ 430,000,000.0		$ 250,000,000.0
Credit facility		430,000,000.0		430,000,000.0			$ 430,000,000
Term Loan Facility | Interest Expense
Line of Credit Facility [Line Items]
Interest expense including delayed draw ticking fees		3,100,000	3,100,000	6,500,000	1,000,000.0
Term Loan Facility | Unsecured Term Loan
Line of Credit Facility [Line Items]
Total deferred finance costs, net		4,100,000		4,100,000		$ 4,400,000
Interest expense recorded from amortization of deferred financing costs		$ 200,000	$ 41,000	$ 400,000	$ 41,000