Lease Commitments - Lease Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease cost (a)	$ 41,953
Amortization of finance lease assets	352
Interest on finance lease liabilities	32
Total finance lease cost	384
Net lease cost	42,337
Short-term lease, cost	7,328
Variable lease, cost	3,480
Cost of Sales
Lessee, Lease, Description [Line Items]
Operating lease cost (a)	36,321
Selling, General and Administrative Expenses
Lessee, Lease, Description [Line Items]
Operating lease cost (a)	$ 5,632