Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 53,588
Finance lease cost:
Amortization of lease assets	1,322
Interest on lease liabilities	1,189
Total finance lease cost	2,511
Short-term lease cost	348
Variable lease cost	16,415
Total lease cost	$ 72,862