Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	May 31, 2018
Debt Instrument [Line Items]
Principal	$ 897,340	$ 950,093
Debt Issuance Costs	(10,074)	(12,230)
Total	887,266	937,863
Less current portion of total debt	68,694	72,347
Long-term debt	828,646	877,746
Total	818,572	865,516
Long-term debt
Debt Instrument [Line Items]
Debt Issuance Costs	(10,100)
Finance lease obligations	3,163	835
KFPC Loan Agreement
Debt Instrument [Line Items]
Principal	17,853	52,730
Debt Issuance Costs	0	(18)
Total	17,853	52,712
KFPC Revolving Facilities
Debt Instrument [Line Items]
Principal	49,873	37,003
Debt Issuance Costs	0	0
Total	49,873	37,003
ABL Facility
Debt Instrument [Line Items]
Principal	0	0
Debt Issuance Costs	0	0
Total	0	0
ABL Facility \| Long-term debt
Debt Instrument [Line Items]
Debt Issuance Costs		(12,200)
Medium-term Notes \| Euro Tranche
Debt Instrument [Line Items]
Principal	96,662	104,159
Debt Issuance Costs	(713)	(996)
Total	$ 95,949	103,163
Senior Notes \| 4.25% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate	4.25%
Principal	$ 400,000	400,000
Debt Issuance Costs	(5,835)	(6,995)
Total	$ 394,165	393,005
Senior Notes \| 5.25% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate	5.25%		5.25%
Principal	$ 329,789	355,366
Debt Issuance Costs	(3,526)	(4,221)
Total	$ 326,263	$ 351,145

Long-term Debt, Gross And Lease Obligation

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Contractual interest rate for funds borrowed, under the debt agreement.

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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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