Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Operating Leases:
Right-of-use assets, net	$ 94,276	$ 96,849
Current portion of operating lease liabilities	24,056	24,862
Operating lease liabilities	68,484	69,860
Finance Leases:
Property, plant and equipment, net	10,065	8,434
Current maturities of long-term debt	2,037	1,683
Long-term debt	$ 8,538	$ 6,867