Secured Notes Payable and Revolving Credit Facility, Net - Loan Costs and Accumulated Amortization (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Loan Costs Included In Interest Expense
Loan premium amortized and written off			$ (344)	$ (2,158)
Deferred loan costs amortized and written off			8,131	5,813
Interest Expense
Loan Costs Included In Interest Expense
Loan premium amortized and written off	$ (116)	$ (116)	(344)	(2,158)
Deferred loan costs amortized and written off	3,939	2,022	8,131	5,813
Loan costs expensed	173	24	208	989
Total	$ 3,996	$ 1,930	$ 7,995	$ 4,644

Loan Costs, Amortization Of Discount (Premium), Debt Issuance Cost, Write-offs, And Expense

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Loan Costs Included In Interest Expense [Abstract]

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Represents the charge against earnings during the period for commitment fees and debt issuance expenses.

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