Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease costs
Fixed	$ 127,990
Short-term	23,658
Variable	37,975
Sub-leases	(848)
Operating lease costs	188,775
Finance lease costs
Amortization of leased assets	4,015
Interest on lease liabilities	491
Finance lease costs	4,506
Lease, Cost	193,281
Cost of Sales
Operating lease costs
Fixed	30,002
Short-term	9,725
Variable	8,123
Sub-leases	(311)
Operating lease costs	47,539
Finance lease costs
Amortization of leased assets	4,015
Interest on lease liabilities	0
Finance lease costs	4,015
Lease, Cost
Selling, General and Administrative Expenses
Operating lease costs
Fixed	97,988
Short-term	13,933
Variable	29,852
Sub-leases	(537)
Operating lease costs	141,236
Finance lease costs
Amortization of leased assets	0
Interest on lease liabilities	491
Finance lease costs	491
Lease, Cost