Derivative Financial Instruments Narrative (Details) $ / shares in Units, shares in Millions		3 Months Ended
	Feb. 28, 2020 USD ($)	Mar. 31, 2021 USD ($) contracts $ / shares shares	Mar. 17, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Apr. 30, 2018 USD ($)	Oct. 31, 2015 USD ($)
Net unrealized loss on hedging instruments		$ 150,309,000		$ 138,526,000
Total debt		921,094,000
Derivative, notional amount		84,100,000
Deferred tax assets, derivative instruments		$ 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
Convertible Debt Securities
Common stock, conversion price (in dollars per share) | $ / shares		$ 126.00
Secured Debt
Total debt		$ 921,094,000		$ 936,094,000
Net Unrealized Gain (Loss) on Nonderivative Instruments
Net unrealized loss on hedging instruments		$ 14,400,000			$ 14,400,000
Number of Counterparties [Member]
Derivative counterparties		6		6
Interest Rate Swap [Member]
Number of interest rate derivatives held					1		1
Derivative, notional amount					$ 240,000,000		$ 214,000,000
Derivative, fixed interest rate					0.617%		1.42%
Derivative, termination fee			$ 1,700,000
Currency Swap [Member]
Number of interest rate derivatives held						1
Derivative, notional amount						$ 56,000,000.0
Derivative, fixed interest rate						1.38%
Foreign currency cash flow hedge gain (loss) to be reclassified during next 12 months		$ 1,800,000
Foreign Exchange Option [Member]
Derivative, notional amount	$ 77,000,000
Derivative purchase price	$ 1,100,000
Forward Contracts [Member]
Number of foreign exchange contracts | contracts		40
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Minimum [Member]
Derivative, notional amount		$ 93,300
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Maximum [Member]
Derivative, notional amount		26,400,000
London Interbank Offered Rate (LIBOR) [Member] | Secured Debt
Total debt		$ 61,100,000