Current and Noncurrent Accrued and Other Liabilities - Summary of Current and Noncurrent Accrued and Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Payables And Accruals [Abstract]
Accrued interest	$ 8,669	$ 7,091
Current portion of operating lease liabilities	$ 6,706	$ 4,066
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherCurrentLiabilitiesMember	us-gaap:OtherCurrentLiabilitiesMember
Accrued payroll and benefits	$ 5,837	$ 5,385
Accrued death and other executive benefits	2,539	2,564
Deferred revenue	1,890	3,443
Other	10,816	9,149
Total current and noncurrent accrued liabilities	36,457	31,698
Less noncurrent portion	6,090	6,214
Current portion of accrued and other liabilities	$ 30,367	$ 25,484