Debt instrument covenant minimum percentage drawn.

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- Definition

Debt instrument current face amount.

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No definition available.

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- Definition

Debt instrument floor rate.

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- Definition

Debt instrument frequency of choosing the method of interest.

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- Definition

Debt instrument interest payment terms.

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- Definition

Debt instrument mandatory principal prepayment paid year and month.

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Debt instrument mandatory principal prepayment to be paid.

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Line of credit facility available sublimit.

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Number of office space under leases.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Discussion of whether the debt instrument is secured or unsecured, and, if secured, a description of the collateral and guarantees required or provided.

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States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

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Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

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Description of reference rate used for variable rate of debt instrument.

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No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Latest date the outstanding debt instruments are required to be repaid, in YYYY-MM-DD format.

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Earliest date the outstanding debt instruments are required to be repaid, in YYYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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- Definition

Discussion of the facts and amounts pertaining to each failure to comply with an affirmative or negative covenant of a long-term debt instrument, including violating payment terms or an inability to meet certain minimum financial requirements or achieve or maintain certain financial ratios. The discussion would generally be expected to also include whether or not the failure can and will be overcome and a description of the terms of any waivers, including the amount of the waiver and the period of time covered by the waiver, and if reclassification of long-term debt to current has been made in the current balance sheet.

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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Period Type:	instant

- Definition

Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate.

+ References

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

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- Definition

Maturity date of long-term debt, in YYYY-MM-DD format.

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- Definition

Indebtedness divided by net capital.

+ References

No definition available.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Debt - Additional Information (Detail) $ in Millions		9 Months Ended
Debt - Additional Information (Detail) $ in Millions	Nov. 01, 2021 USD ($)	Sep. 30, 2021 USD ($) Office	Sep. 23, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)
Debt Instrument [Line Items]
Number of office space under leases \| Office		2
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, Interest rate description		Amounts outstanding under the Revolver bear interest at a tiered floating interest rate based on the net leverage ratio of the borrower. The rate may be chosen monthly in advance at the election of the borrower
Debt instrument, Maturity date range, Start		Aug. 11, 2026
Debt instrument, Maturity date range, End		Dec. 31, 2023
Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, Unused capacity, Commitment fee percentage		0.375%
Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, Unused capacity, Commitment fee percentage		0.50%
Revolving Credit Facility [Member] \| Option Number One [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate, Stated percentage		2.50%
Debt instrument, Floor rate		2.00%
Revolving Credit Facility [Member] \| Option Number Two [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate, Stated percentage		3.50%
Revolving Credit Facility [Member] \| Fed Funds Effective Rate Overnight Index Swap Rate [Member] \| Option Number One [Member]
Debt Instrument [Line Items]
Debt instrument, Basis spread on variable rate		0.50%
Debt instrument, Description of variable rate basis		the federal funds
Revolving Credit Facility [Member] \| LIBOR [Member] \| Option Number One [Member]
Debt Instrument [Line Items]
Debt instrument, Basis spread on variable rate		1.00%
Debt instrument, Description of variable rate basis		one-month LIBOR
Revolving Credit Facility [Member] \| LIBOR [Member] \| Option Number Two [Member]
Debt Instrument [Line Items]
Debt instrument, Description of variable rate basis		one-month LIBOR
Revolving Credit Facility Net Letters of Credits [Member]
Debt Instrument [Line Items]
Line of credit facility, Remaining borrowing capacity		$ 139.3		$ 84.0
Letters of Credit under the Revolver [Member]
Debt Instrument [Line Items]
Line of credit facility, Maximum borrowing capacity		0.7			$ 1.0
Line of credit facility, Remaining borrowing capacity		19.3			$ 19.0
Line of credit facility, Available sublimit		$ 20.0
First Lien Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate terms		the First Lien Term Loan bear interest using either of the following two options which are chosen quarterly in advance at the election of the borrower
Debt instrument, Frequency of choosing the method of interest		The Company chooses the method of interest for a period of either one month, two months, three months or six months.
Debt instrument, Interest payment terms		Interest is payable on the last business day of the period selected except for the six-month period, where it is payable on the last day of the third and sixth month.
Debt instrument, Periodic payment, Principal		$ 1.6
Debt instrument, Frequency of periodic payment		last business day of each March, June, September and December.
Debt instrument, Maturity date range, Start		Feb. 11, 2027
First Lien Term Loan [Member] \| Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value		$ 612.0		609.5
First Lien Term Loan [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 100.0
First Lien Term Loan [Member] \| Option Number One [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate, Stated percentage		2.50%
Debt instrument, Floor rate		2.00%
First Lien Term Loan [Member] \| Option Number Two [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate, Stated percentage		3.50%
Debt instrument, Floor rate		1.00%
First Lien Term Loan [Member] \| Fed Funds Effective Rate Overnight Index Swap Rate [Member] \| Option Number One [Member]
Debt Instrument [Line Items]
Debt instrument, Basis spread on variable rate		0.50%
Debt instrument, Description of variable rate basis		the federal funds rate
First Lien Term Loan [Member] \| LIBOR [Member] \| Option Number One [Member]
Debt Instrument [Line Items]
Debt instrument, Basis spread on variable rate		1.00%
Debt instrument, Description of variable rate basis		one-month London Interbank Offered Rate (“LIBOR”)
First Lien Term Loan [Member] \| LIBOR [Member] \| Option Number Two [Member]
Debt Instrument [Line Items]
Debt instrument, Description of variable rate basis		one-month LIBOR
First Lien Term Loan Due June 19, 2024 [Member]
Debt Instrument [Line Items]
Long-term debt, Maturity date		Jun. 19, 2024
The Credit Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, Face amount				740.0
Debt instrument, Current face amount			$ 795.0
Debt instrument, Collateral		Outstanding borrowings under the Credit Agreement are collateralized by a first-priority security interest in substantially all of the equity interests of the Company.
Debt instrument, Covenant description		The Company’s Credit Agreement contains financial covenants and covenants that, among other things, restrict the Company’s ability to: incur certain additional indebtedness; transfer money between its various subsidiaries; pay dividends on, repurchase or make distributions with respect to its subsidiaries’ capital stock or make other restricted payments; issue stock of subsidiaries; make certain investments, loans or advances; transfer and sell certain assets; create or permit liens on assets; consolidate, merge, sell or otherwise dispose of all or substantially all of its assets; enter into certain transactions with its affiliates; and amend certain documents. The financial covenants also require that the Company remains within a specified leverage ratio of 6.75:1.00 once it draws down on 35% or more of the Revolver.
Ratio of indebtedness to net capital		6.75
Debt instrument, Covenant compliance		The Company was in compliance with all financial covenants under the Credit Agreement
Debt instrument, Debt default, Description of event of default		The Company’s Credit Agreement also contains various events of default with respect to the indebtedness, including, without limitation, the failure to pay interest or principal when the same is due, cross default and cross acceleration provisions, the failure of representations and warranties contained in the agreements to be true and certain insolvency events. If an event of default occurs and is continuing, the principal amounts outstanding thereunder, together with all accrued and unpaid interest and other amounts owed thereunder, may be declared immediately due and payable by the lenders.
The Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, Maximum borrowing capacity				85.0
Debt instrument, Covenant, Minimum percentage drawn		35
The Credit Agreement [Member] \| First Lien Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, Face amount				655.0
Debt instrument, Mandatory principal prepayment to be paid				$ 6.7
Debt instrument, Mandatory principal prepayment paid, Year and month		2021-04
The Sixth Amendment [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, Current borrowing capacity			$ 140.0