Current and Noncurrent Accrued and Other Liabilities - Summary of Current and Noncurrent Accrued and Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Accrued interest	$ 19,145	$ 8,669
Accrued payroll and benefits	15,775	5,837
Current portion of operating lease liabilities	7,720	6,706
Accrued death and other executive benefits	2,521	2,539
Deferred revenue	474	1,890
Series E Redeemable Preferred - embedded derivative		1,029
Other	9,177	9,787
Total current and noncurrent accrued liabilities	54,812	36,457
Less noncurrent portion	4,040	6,090
Current portion of accrued and other liabilities	$ 50,772	$ 30,367