Leases - Leases Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease costs	$ 36,900	$ 37,600	$ 108,600	$ 113,400
Variable lease payments	$ 2,900	$ 3,400	$ 5,400	$ 8,800
Weighted average remaining lease term (in years)	9 years 2 months 26 days	6 years 11 months 15 days	9 years 2 months 26 days	6 years 11 months 15 days
Weighted average discount rate	382.00%	429.00%	382.00%	429.00%
Operating cash outflows from operating leases	$ 37,810	$ 32,331	$ 113,784	$ 83,183
Leased assets obtained in exchange for new operating lease liabilities	11,018	$ 17,732	393,850	$ 47,832
Leases not yet commenced	$ 12,800		$ 12,800