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Summary of Significant Accounting Policies - Revenue Recognition (Details) | 12 Months Ended
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Dec. 31, 2017 method
Accounting Policies [Abstract] |
Number of primary methods or sales channels | 2
Contract duration (or less) | 1 year

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- Definition Contract Duration + References No definition available. + Details
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Namespace Prefix: | ryn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of Sales Categories + References No definition available. + Details
Name: | ryn_NumberofSalesCategories
Namespace Prefix: | ryn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration