Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Valuation allowance	$ 119,156	$ 71,157	$ 10,500
Unrecognized tax benefits that would impact the effective tax rate	2,400
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit		$ 27,100
Unrecognized tax benefits, income tax penalties	(8,600)
Unrecognized tax benefits, interest on income taxes	(12,000)
Unrecognized tax benefits, interest on income taxes expense, net	200
Unrecognized tax benefits, interest on income taxes accrued	300
Federal
Income Tax Disclosure [Line Items]
Net operating loss carry-forwards	21,200
State
Income Tax Disclosure [Line Items]
Net operating loss carry-forwards	1,100
Foreign
Income Tax Disclosure [Line Items]
Net operating loss carry-forwards	26,400
Foreign | Switzerland
Income Tax Disclosure [Line Items]
Net operating loss carry-forwards	$ 2,400