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Derivative Financial Instruments Narrative (Details) $ / shares in Units, shares in Millions |  | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2021 USD ($) | Sep. 30, 2021 USD ($) contracts $ / shares shares | Jun. 30, 2021 USD ($) $ / shares shares | Sep. 30, 2020 USD ($) shares | Sep. 30, 2021 USD ($) contracts shares | Sep. 30, 2020 USD ($) shares | Mar. 17, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Apr. 30, 2018 USD ($) | Oct. 31, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax |  | $ 151,739,000 |  |  | $ 151,739,000 |  |  | $ 138,526,000 |  |  |
Derivative, notional amount |  |  | $ 84,100,000 |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares |  | 0.4 |  | 0.8 | 0.5 | 0.8 |  |  |  |  |
Deferred tax assets, derivative instruments |  | $ 20,600,000 | $ 20,600,000 |  | $ 20,600,000 |  |  |  |  |  |
Treasury stock, shares, acquired | shares |  |  | 3.7 |  |  |  |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights | $ / shares |  |  | $ 180.00 |  |  |  |  |  |  |  |
Class of Warrant or Right, Premium, Percentage |  |  | 1 |  |  |  |  |  |  |  |
Class of Warrant or Right, Aggregate Proceeds From Transaction |  |  | $ 45,300,000 |  |  |  |  |  |  |  |
Number of Counterparties [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative counterparties |  | 4 |  |  | 4 |  |  | 6 |  |  |
Net Unrealized Gain (Loss) on Nonderivative Instruments |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax |  | $ 14,400,000 |  | $ 14,400,000 | $ 14,400,000 | $ 14,400,000 |  |  |  |  |
Convertible Debt Securities |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares |  | 3.7 | 3.7 |  | 3.7 |  |  |  |  |  |
Common stock, conversion price (in dollars per share) | $ / shares |  | $ 126.00 | $ 126.00 |  |  |  |  |  |  |  |
Forward Contracts [Member] |  |  |  |  |  |  |  |  |  |  |
Number of foreign exchange contracts | contracts |  | 37 |  |  | 37 |  |  |  |  |  |
Foreign Exchange Contract [Member] | Minimum | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  | $ 150,000 |  |  | $ 150,000 |  |  |  |  |  |
Foreign Exchange Contract [Member] | Maximum | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  | $ 56,400,000 |  |  | $ 56,400,000 |  |  |  |  |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  |  | $ 240,000,000 |  | $ 214,000,000
Number of interest rate derivatives held |  |  |  |  |  |  |  |  | 1 |  | 1
Derivative, fixed interest rate |  |  |  |  |  |  |  |  | 0.617% |  | 1.42%
Derivative, termination fee |  |  |  |  |  |  | $ 1,700,000 |  |  |  |
Currency Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  |  |  | $ 56,000,000 |
Number of interest rate derivatives held |  |  |  |  |  |  |  |  |  | 1 |
Derivative, fixed interest rate |  |  |  |  |  |  |  |  |  | 1.38% |
Foreign Exchange Option [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount | $ 77,000,000 |  |  |  |  |  |  |  |  |  |
Derivative purchase price | $ 1,100,000 |  |  |  |  |  |  |  |  |  |

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