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Financing Arrangements - Additional Information (Detail) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Dec. 31, 2017 | Dec. 31, 2014 | Sep. 30, 2021 | Sep. 30, 2020 | May 31, 2020 | Mar. 31, 2020 | Dec. 31, 2011
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit and bank guarantees |  |  |  |  |  | $ 78,084 |  |  |  |
Short-term borrowing |  |  |  |  |  | 0 | $ 100,000 |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 650,000 |  |  |  |  |  |  |
Debt Interest rate |  |  | 2.538% |  |  |  |  |  |  |
Debt issue cost |  |  | $ 6,121 |  |  |  |  |  |  |
Interest Expense Debt |  |  |  |  |  | 17,034 |  |  |  |
Long Term Debt Fair Value |  |  |  |  |  | 651,112 |  |  |  |
Senior Notes [Member] | Accrued Liabilities [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |
Accrued Interest Current |  |  |  |  |  | 4,815 |  |  |  |
Senior Notes [Member] | Long-term Debt [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |
Noncurrent outstanding principal portion |  |  |  |  |  | $ 650,000 |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |
Five-year revolving credit facility |  |  |  |  |  |  |  |  |  | $ 500,000
Revolving credit facility, maturity term |  |  |  |  |  | 5 years |  |  |  |
Revolving credit facility, maturity period |  | 2026-03 |  | 2022-12 | 2019-12 |  |  |  |  |
Borrowings under the revolving credit facility |  |  |  |  |  |  |  |  | $ 300,000 |
Repayments of revolving credit facility |  |  | 300,000 |  |  |  |  |  |  |
Repayments of short term loans | $ 100,000 |  | $ 50,000 |  |  |  |  |  |  |
Outstanding borrowings |  |  |  |  |  | $ 0 |  |  |  |
Short-term borrowing |  |  |  |  |  |  |  | $ 100,000 | $ 50,000 |

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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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