Debt - Summary of Future Estimated Amortization of Deferred Financing Fees (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Estimated Future Amortization Of Deferred Financing Fee Disclosure [Line Items]
Deferred financing fees	$ 13,262	$ 12,302
2021
Estimated Future Amortization Of Deferred Financing Fee Disclosure [Line Items]
Deferred financing fees	1,532
2022
Estimated Future Amortization Of Deferred Financing Fee Disclosure [Line Items]
Deferred financing fees	6,346
2023
Estimated Future Amortization Of Deferred Financing Fee Disclosure [Line Items]
Deferred financing fees	4,990
2024
Estimated Future Amortization Of Deferred Financing Fee Disclosure [Line Items]
Deferred financing fees	$ 394