Commitments and Contingencies - Other taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Liability for uncertain tax positions	$ 27,000	$ 22,600
Net loss attributable to common stockholders	$ 307,063	$ 121,949	$ 63,708
Settled Litigation
Loss Contingencies [Line Items]
Net loss attributable to common stockholders			$ 13,400