Leases - Leases Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease costs	$ 37,900	$ 37,100
Variable lease payments	$ 2,000	$ 2,200
Weighted average remaining lease term (in years)	9 years 7 months 20 days	7 years 4 months 6 days
Weighted average discount rate	399.00%	430.00%
Operating cash outflows from operating leases	$ 36,547	$ 17,563
Leased assets obtained in exchange for new operating lease liabilities	72,963	$ 3,344
Leases not yet commenced	$ 9,200