Credit Arrangements (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Credit Agreements
Total debt	$ 1,105,679	$ 1,151,735
Unamortized debt issuance costs	(6,927)	(8,283)
Total debt, net	1,098,752	1,143,452
Less: current portion	(85,233)	(78,137)
Long-term debt, net of current portion	1,013,519	1,065,315
Term loan
Credit Agreements
Total debt	897,752	933,188
Revolving credit facility
Credit Agreements
Total debt	120,000	100,000
Commercial equipment notes
Credit Agreements
Total debt	68,089	98,064
Mortgage notes
Credit Agreements
Total debt	$ 19,838	$ 20,483