Revenue - Allowance for Credit Losses (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ (1,425,267)	$ (1,132,150)	$ (1,425,267)	$ (1,132,150)	$ (1,434,397)	$ (1,489,374)	$ (1,037,865)		$ (1,126,250)
Accounts Receivable, Allowances		2,143	11,125	2,143	11,125	2,017	5,372	6,895
Allowance for Credit Losses [Roll Forward]
Beginning Balance(1)		2,017	6,895	5,372
Bad Debt Expense		(28)	4,857	(1,766)	5,331
Write-offs, foreign currency translation and other adjustments		154	(627)	(1,463)	(3,397)
Ending Balance		2,143	11,125	2,143	11,125
Retained Earnings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ (1,023,260)	$ (590,866)	$ (1,023,260)	(590,866)	$ (914,120)	$ (798,573)	$ (561,017)		(558,269)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	[1]									1,310
Accounts Receivable, Allowances										9,191
Allowance for Credit Losses [Roll Forward]
Beginning Balance(1)					$ 9,191
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest									$ 1,310	$ 1,310	[1]

[1] The cumulative adjustment relates to the adoption of Accounting Standards Update ("ASU") No. 2016-13, "Measurement of Credit Losses on Financial Instruments" ("ASU 2016-13") on January 1, 2020, for which the Company recorded an adjustment to Retained Earnings to reflect an increase in the Company's Allowance for Doubtful Accounts as a result of the use of the current expected credit loss model.