Lease Obligations - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lease Obligations
Operating cash flows for operating leases	$ 121,394	$ 121,708
Operating cash flows for finance leases	2,287	1,061
Financing cash flows for finance leases	2,923	2,355
New, remeasured, and terminated operating leases	44,041	25,296
New, remeasured and terminated finance leases	$ 51,920	$ 31,895