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Indebtedness - Additional Information (Detail) - USD ($)			3 Months Ended			5 Months Ended	6 Months Ended	12 Months Ended
	Apr. 22, 2020	Jun. 30, 2017	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2019	Sep. 30, 2020	Jun. 30, 2017	Dec. 31, 2019	Mar. 31, 2020	Dec. 31, 2018
Debt Instrument [Line Items]
Short term debt					$ 0					$ 0
Proposed acquisition of consideration								$ 60,904,000
Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Senior secured credit facility, maturity date							Jun. 30, 2022
Credit agreement, covenant description					The agreement contains two key financial covenants; namely, borrowers are required to maintain a Consolidated Funded Debt Ratio (the “CFD Ratio”) of no more than 3.25-to-1 and a Consolidated Fixed Charge Covenant Ratio of at least 1.25-to-1.
Credit agreement, variable rate description					Under the agreement, revolving loans bear interest at a variable rate based, at borrower’s election with proper notice, on either (i) LIBOR plus the “Applicable Rate” which is based upon the Consolidated Funded Debt Ratio (“Eurocurrency Rate Loan”) or (ii) the greater of (x) the Prime Rate, (y) the Federal Funds Rate plus 0.5%, and (z) the Daily One-Month LIBOR Rate plus 1.00%, plus, in the case of (x), (y) or (z) the Applicable Rate (“Alternate Base Rate Loan”).
Federal Funds Rate | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Credit agreement, variable rate basis		0.50%
One-Month LIBOR Rate | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Credit agreement, variable rate basis		1.00%
Eurocurrency Rate | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Credit agreement, interest payment period, description					last day of each interest period (either one, two, three or six months, as selected by the borrower)
Alternate Base Rate | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Credit agreement, interest payment period, description					last business day of each month
Credit Agreement | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Available borrowings capacity under credit agreement					$ 56,707,000
Consolidated funded debt ratio	325.00%
Consolidated funded debt thereafter ratio	325.00%
Proposed acquisition of consideration	$ 15,000,000
Business combination consideration term	90 days
Credit Agreement | Senior Secured Revolving Line of Credit | Forecast
Debt Instrument [Line Items]
Consolidated funded debt ratio			350.00%	375.00%		400.00%
Maximum | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Available borrowings capacity under credit agreement		$ 250,000,000					$ 250,000,000
Consolidated funded debt ratio		325.00%
Maximum | Term Loan
Debt Instrument [Line Items]
Accordion feature		$ 100,000,000					$ 100,000,000
Maximum | Credit Agreement | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Consolidated funded debt ratio	425.00%
Proposed acquisition of consideration	$ 50,000,000
Capacity to increase borrowings under credit agreement									$ 39,552,000
Minimum
Debt Instrument [Line Items]
Consolidated fixed charge covenant ratio		125.00%
Minimum | Credit Agreement | Senior Secured Revolving Line of Credit
Debt Instrument [Line Items]
Consolidated funded debt ratio	50.00%
Proposed acquisition of consideration	$ 30,000,000

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