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Derivative Instruments and Hedging Activities - Additional Information (Details) | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2020 EUR (€) | Aug. 31, 2020 | Mar. 31, 2020 EUR (€) | Aug. 31, 2019 USD ($) | Aug. 31, 2019 EUR (€) | Jul. 31, 2019 USD ($)
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Euro Notes |  |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 3.00% |  |  |  |
Net Investment Hedges |  |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |  |
Cumulative net gains | $ (1,082,000) |  |  |  |  |  |  |  |
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 Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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