Restructuring and Other Termination Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and other termination costs	$ 34,769	$ 0
Termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other termination costs	29,944	0
Acclerated Vesting on Stock-Based Compensation Expense
Restructuring Cost and Reserve [Line Items]
Restructuring and other termination costs	4,750	0
Office Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other termination costs	$ 75	$ 0