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Segment and Geographical Information - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) core_business_area | Dec. 31, 2015 segment core_business_area
Segment Reporting [Abstract] |  |
Number of reportable segments | segment |  | 5
Sale of timberlands reclassification threshold | $ | $ 20 |
Number of core business areas | core_business_area | 2 | 2

X
- Definition Number of Core Business Areas + References No definition available. + Details
Name: | ryn_NumberofCoreBusinessAreas
Namespace Prefix: | ryn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sale of Timberlands Reclassification Threshold + References No definition available. + Details
Name: | ryn_SaleofTimberlandsReclassificationThreshold
Namespace Prefix: | ryn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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