Leases - Schedule of Occupancy Expense and Supplemental Cash Flow Information Related to Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lease, Cost [Abstract]
Fixed costs	$ 8,347	$ 25,183
Variable costs	7	77
Short-term lease costs	126	849
Sublease income	(1,010)	(3,190)
Net lease expense	$ 7,470	22,919
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		24,674
ROU assets obtained in exchange for lease obligations:
Operating leases		$ 172,189