Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Leases:
Right-of-use assets, net	$ 89,772	$ 96,849
Current portion of operating lease liabilities	23,632	24,862
Operating lease liabilities	64,029	69,860
Finance Leases:
Property, plant and equipment, net	8,362	8,434
Current maturities of long-term debt	1,598	1,683
Long-term debt	$ 6,901	$ 6,867