Borrowings - Components of Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt outstanding	$ 2,610,574	$ 2,847,002
Less: Debt discount and issuance costs	(30,506)	(38,577)
Total	2,580,068	2,808,425
Term Loan
Debt Instrument [Line Items]
Debt outstanding	420,000	425,000
Convertible Senior Notes
Debt Instrument [Line Items]
Debt outstanding	632,500	632,500
Americas revolving credit | Line of Credit
Debt Instrument [Line Items]
Debt outstanding	558,103	772,037
Europe revolving credit | Line of Credit
Debt Instrument [Line Items]
Debt outstanding	$ 999,971	$ 1,017,465