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Debt (Details) $ in Thousands, $ in Millions	Jun. 30, 2022 USD ($)	Jun. 30, 2022 CAD ($)	Dec. 31, 2021 USD ($)
Credit Agreements
Total debt	$ 704,703		$ 665,660
Unamortized debt issuance costs	(3,673)		(4,198)
Total debt, net	701,030		661,462
Current portion of long-term debt	(63,116)		(67,230)
Long-term debt, net of current portion	637,914		594,232
Revolving Credit Facility
Credit Agreements
Total debt	65,000
Term Loan
Credit Agreements
Total debt	505,469		520,281
Commercial equipment notes
Credit Agreements
Total debt	113,335		107,934
Mortgages
Credit Agreements
Total debt	$ 20,899		$ 37,445
Foreign letters of credit [Member]
Credit Agreements
Letters of credit outstanding		$ 0.7