Leases Leases (Components of Lease Cost) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Total finance lease cost	$ 7,147
Selling, general and administrative expenses [Member]
Operating lease cost	39,243	[1]
Depreciation [Member]
Finance lease cost: Amortization of ROU assets	6,534	[2]
Interest expense [Member]
Finance lease cost: Interest on lease liabilities	$ 613

[1] Includes short-term leases and variable lease costs, which are not material.

[2] A portion of the operating lease cost and amortization of ROU assets held under finance leases is included within cost of sales on the consolidated statements of operations, depending on the type of operations undertaken by the related facility or asset.