Financial Commitments (Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt	$ 1,003,054	$ 993,654
Less: Current maturities	23,285	24,406
Long-term debt, net	979,769	969,248
Term Loan B
Debt Instrument [Line Items]
Total debt	405,777	406,335
Equipment financing and mortgages
Debt Instrument [Line Items]
Total debt	55,700	56,246
Other indebtedness
Debt Instrument [Line Items]
Total debt	4,079	7,829
2017 Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Total debt	496,498	496,244
2020 Revolver
Debt Instrument [Line Items]
Total debt	$ 41,000	$ 27,000

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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