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Derivative Instruments and Hedging Activities - Additional Information (Details) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2020 EUR (€) | Aug. 31, 2020 EUR (€) | Aug. 31, 2019 USD ($) | Aug. 31, 2019 EUR (€) | Jul. 31, 2019 USD ($)
--- | --- | --- | --- | --- | --- | --- | --- | ---
Net Investment Hedges |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Cumulative net gains | $ (17,636,000) |  |  |  |  |  |  |
Net Investment Hedges | Designated as Hedging Instrument | Euro Notes |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Hedged notes | € |  |  |  |  | € 300,000,000 |  |  |
Cumulative net gains | 3,256,000 |  |  |  |  |  |  |
Interest Rate Swap Agreements |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Notional amount | $ 350,000,000 | $ 350,000,000 |  |  |  |  |  | $ 350,000,000
Cross-currency Swap Agreements | Net Investment Hedges |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |
Notional amount |  |  | $ 359,200,000 | € 300,000,000 |  | $ 110,000,000 | € 99,055,000 |
Interest rate |  |  | 4.50% | 4.50% |  | 6.00% | 6.00% |
Weighted average interest rate |  |  | 3.40% | 3.40% |  | 3.65% | 3.65% |

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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