Leases - Balance Sheet Information (Details) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Operating Leases:
Operating Lease Right-of-Use Asset	$ 187,097
Current Portion of Operating Lease Obligations	61,670
Operating Lease Obligations	110,466
Total Operating Lease Liabilities	172,136
Finance Leases:
Property, Plant and Equipment	72,916
Less—Accumulated Depreciation, Depletion and Amortization	63,008
Property, Plant and Equipment—Net	9,908
Current Portion of Finance Lease Obligations	7,164
Finance Lease Obligations	7,706
Total Finance Lease Liabilities	$ 14,870