Long-Term Debt - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2021	Mar. 31, 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		146,860,000	200,000,000		$ 200,000,000
Proceeds from Debt, Net of Issuance Costs		187,800,000
Debt Instrument, Unamortized Discount		1,096,000	1,604,000		4,000,000.0
Unamortized Debt Issuance Expense		$ 3,602,000	$ 3,299,000		$ 8,200,000
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		3.11%
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		102.00%
Line of Credit [Member] | Year 2 [Domain]
Debt Disclosure [Line Items]
Prepayment Premium		101.00%
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		825.00%	9.25%
Debt Instrument, Interest Rate Floor		1.00%
Payment for Debt Extinguishment or Debt Prepayment Cost	50,000,000
Repayments of Debt	$ 1,300,000
Asset Coverage Ratio	1.25
Write off Deferred Debt Issuance and Original Issuance Costs	$ 1,200,000
Second Lien Facility Interest Rate		9.25%
Second Lien Facility [Member] | Year 1 [Domain]
Debt Disclosure [Line Items]
Prepayment Premium		102.00%
Year 2 [Domain] | Year 1 [Domain]
Debt Disclosure [Line Items]
Prepayment Premium		101.00%