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Long-Term Debt (New Credit Facility) - Additional Information (Detail) - USD ($) |  | 9 Months Ended |
--- | --- | --- | ---
Mar. 17, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Nov. 13, 2020
Debt Instrument [Line Items] |  |  |  |
Repayments of revolving facility |  | $ 330,000,000 | $ 100,000,000 |
Term Loan A- Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit outstanding principal amount |  |  |  | $ 352,400,000
New Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Date entered into an agreement | Mar. 17, 2021 |  |  |
Repayments of revolving facility |  | $ 60,000,000.0 |  |
Term loan remaining balance due date |  | Mar. 17, 2026 |  |
Maximum incremental debt amount |  | $ 480,000,000.0 |  |
Incremental debt amount maximum percentage of consolidated EBITDA |  | 100.00% |  |
Consolidated senior secured net leverage ratio |  | 350.00% |  |
Maximum consolidated net leverage ratio |  | 500.00% |  |
Minimum interest coverage ratio |  | 300.00% |  |
New Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate |  | 1.75% |  |
New Credit Facility [Member] | Base Rate Loans [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate |  | 0.75% |  |
New Credit Facility [Member] | December 31, 2021 to March 31, 2022 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term loan principal repayments |  | $ 2,700,000 |  |
New Credit Facility [Member] | June 30, 2022 to March 31, 2024 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term loan principal repayments |  | 5,300,000 |  |
New Credit Facility [Member] | June 30, 2024 to March 31, 2025 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term loan principal repayments |  | 8,000,000.0 |  |
New Credit Facility [Member] | June 30, 2025 to December 31, 2025 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term loan principal repayments |  | 10,600,000 |  |
New Credit Facility [Member] | Senior Secured Revolving Line of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit outstanding principal amount | $ 600,000,000.0 | 100,000,000 |  |
Debt instrument maturity date | Mar. 17, 2026 |  |  |
Amount available under revolving line of credit |  | $ 496,600,000 |  |
Unused fee payable percentage |  | 0.25% |  |
New Credit Facility [Member] | Term Loan A- Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit outstanding principal amount | $ 425,000,000.0 | $ 419,687,000 |  |
Debt instrument maturity date | Mar. 17, 2026 |  |  |
New Credit Facility [Member] | Letters of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit outstanding principal amount | $ 20,000,000.0 |  |  |
New Credit Facility [Member] | Swingline Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit outstanding principal amount | $ 20,000,000.0 |  |  |
New Credit Facility [Member] | Standby Letters of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit outstanding principal amount |  | $ 3,400,000 |  |
Amended and Restated Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Agreement termination date | Mar. 17, 2021 |  |  |

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- Definition Incremental debt amount maximum percentage of consolidated EBITDA. + References No definition available. + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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