Leases - Net Lease Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 144,727
Variable lease cost	16,404
Sublease income	(38,901)
Total lease cost, net	122,230
Cash paid for amounts included in the measurement of operating lease liabilities	135,799
Cash receipts from sublease arrangements	34,441
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 136,997
Weighted average remaining lease term for operating leases	10 years 2 months 12 days
Weighted average discount rate for operating leases	6.70%
Cost of subleasing activities	$ 43,200