Long-Term Debt - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Jan. 31, 2021	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	May 03, 2019	Sep. 29, 2017
Debt Disclosure [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Gross			$ 400,000
Letters of credit outstanding			$ 400,000	$ 400,000
Current Ratio			1.00
Debt To E B I T D Ratio Maximum			3.50
Anti-hording provision, Max cash			$ 25,000,000
Second Lien Facility			144,985,000	200,000,000		$ 200,000,000
Debt Instrument, Unamortized Discount			1,012,000	1,604,000
Unamortized Debt Issuance Expense			$ 3,324,000	$ 3,299,000
First Lien Debt To E B I T D Ratio Maximum			2.50
Amortization Payment	$ 1,875,000
Revolving Credit Facility
Debt Disclosure [Line Items]
Commitment fee			0.50%
Minimum [Member] | Revolving Credit Facility
Debt Disclosure [Line Items]
Interest rate			1.50%
Minimum [Member] | LIBOR | Revolving Credit Facility
Debt Disclosure [Line Items]
Applicable margin			2.50%
Maximum [Member] | Revolving Credit Facility
Debt Disclosure [Line Items]
Interest rate			2.50%
Maximum [Member] | LIBOR | Revolving Credit Facility
Debt Disclosure [Line Items]
Applicable margin			3.50%
Revolving Credit Facility
Debt Disclosure [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 375,000,000		$ 1,000,000,000.0
Line of Credit Facility, Current Borrowing Capacity			$ 350,000,000
Interest Rate at Period End			3.08%
Revolving Credit Facility | Interest Payable One [Member]
Debt Disclosure [Line Items]
Debt Instrument, Interest Payable Period			1 month
Revolving Credit Facility | Interest Payable Two [Member]
Debt Disclosure [Line Items]
Debt Instrument, Interest Payable Period			3 months
Revolving Credit Facility | Interest Payable Three [Member]
Debt Disclosure [Line Items]
Debt Instrument, Interest Payable Period			6 months
Line of Credit [Member] | Year 1 [Domain]
Debt Disclosure [Line Items]
Prepayment Premium			10200.00%
Line of Credit [Member] | Year 2 [Domain]
Debt Disclosure [Line Items]
Prepayment Premium			10100.00%
Line of Credit [Member] | Letter of Credit
Debt Disclosure [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 25,000,000
Second Lien Facility [Member]
Debt Disclosure [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Gross	1,400,000
Interest rate option two, applicable margin rate			8.25%	7.25%
Interest rate option one, applicable margin rate over Adjusted LIBOR		9.25%	825.00%
Debt Instrument, Interest Rate Floor			1.00%
Payment for Debt Extinguishment or Debt Prepayment Cost	50,000,000.0
Repayments of Debt	$ 1,300,000
Asset Coverage Ratio	1.25
Second Lien Facility Interest Rate			9.25%
Second Lien Facility [Member] | Year 1 [Domain]
Debt Disclosure [Line Items]
Prepayment Premium			10200.00%
Year 2 [Domain] | Year 1 [Domain]
Debt Disclosure [Line Items]
Prepayment Premium			10100.00%