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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Debt Obligations (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Mar. 18, 2019	Oct. 17, 2018	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	May 22, 2019
Debt Instrument [Line Items]
Senior notes (in USD)			$ 663,900
Conversion price	$ 188.73
Debt instrument, convertible, carrying amount of equity component			99,700
Debt instrument, interest rate during period	100.00%
Line of credit facility, expiration date		Oct. 17, 2023
Line of credit, current			400		$ 900
Unamortized debt issuance costs			13,610		$ 13,729
Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			200,000
Unamortized debt issuance costs			2,100
Due 2049 [Member]
Debt Instrument [Line Items]
Sale of convertible senior notes	$ 525,000
Interest expense, debt			1,000	$ 1,000
Amortization of debt discount (premium)			3,900
Unamortized debt issuance costs			$ 6,400
Senior Notes, 1.375 Percent due 2026 [Member]
Debt Instrument [Line Items]
Senior notes (in USD)						$ 669,900
Long-term debt, percentage bearing fixed interest, percentage rate			1.375%
Unamortized debt issuance costs			$ 5,100
Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, applicable margin			1.125%
Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, applicable margin			0.175%
Maximum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, applicable margin			2.00%
Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, applicable margin			1.00%
Swingline loans [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 50,000
Foreign Swingline Loans [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			90,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,000,000
Euro Member Countries, Euro
Debt Instrument [Line Items]
Senior notes (in USD)			$ 600,000
Euro Member Countries, Euro \| Senior Notes, 1.375 Percent due 2026 [Member]
Debt Instrument [Line Items]
Senior notes (in USD)						$ 600,000