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Debt and Finance Leases - Schedule of Maturities of Long-term Debt (Details) $ in Thousands | Mar. 30, 2024 USD ($)
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Debt Disclosure [Abstract] |
Remainder of 2024 | $ 18,713
2025 | 19,003
2026 | 483,691
2027 | 245,664
2028 | 9,967
Thereafter | 19,702
Total debt principal payments | $ 796,740

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- Definition Debt, Gross + References No definition available. + Details
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Balance Type: | credit
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- Definition Debt, Maturity, After Year Four + References No definition available. + Details
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- Definition Debt, Maturity, Remainder of Fiscal Year + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Debt, Maturity, Year Four + References No definition available. + Details
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- Definition Debt, Maturity, Year One + References No definition available. + Details
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Balance Type: | credit
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- Definition Debt, Maturity, Year Three + References No definition available. + Details
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- Definition Debt, Maturity, Year Two + References No definition available. + Details
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Namespace Prefix: | ryam_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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