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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]  
Derivative [Line Items]  
AOCI balance expected to be reclassified in next twelve months, net of tax $ (1.8)us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
New Zealand Timber [Member] | Minimum [Member]  
Derivative [Line Items]  
Percent of forecast sales and purchases hedged for three months 50.00%ryn_PercentageofForeignCurrencyExposureHedgedForForecastedSalesInNextThreeMonths
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= ryn_NewZealandTimberSegmentMember
Percent of forecast sales and purchases hedged for three to 12 months 50.00%ryn_PercentageofForeignCurrencyExposureHedgedForForecastedSalesInNextThreetoTwelveMonths
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= ryn_NewZealandTimberSegmentMember
New Zealand Timber [Member] | Maximum [Member]  
Derivative [Line Items]  
Percent of forecast sales and purchases hedged for three months 90.00%ryn_PercentageofForeignCurrencyExposureHedgedForForecastedSalesInNextThreeMonths
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= ryn_NewZealandTimberSegmentMember
Percent of forecast sales and purchases hedged for three to 12 months 75.00%ryn_PercentageofForeignCurrencyExposureHedgedForForecastedSalesInNextThreetoTwelveMonths
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= ryn_NewZealandTimberSegmentMember
Percent of forecast sales and purchases hedged for 12 to 18 months 50.00%ryn_PercentageofForeignCurrencyExposureHedgedForForecastedSalesInNextTwelvetoEighteenMonths
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= ryn_NewZealandTimberSegmentMember
Matariki Forestry Group [Member] | Not Designated as Hedging Instrument [Member] | Senior Secured Facilities Agreement as Amended July 2013, Revolving Cash Advance Facility due 2016 [Member] | Interest Rate Swap [Member]  
Derivative [Line Items]  
Percent of New Zealand JV variable rate debt hedged 81.00%ryn_InterestRateDerivativeInstrumentsNotDesignatedasHedgingInstrumentsPercentSwapped
/ us-gaap_DebtInstrumentAxis
= ryn_SeniorSecuredFacilitiesAgreementasAmendedJuly2013RevolvingCashAdvanceFacilitydue2016Member
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ dei_LegalEntityAxis
= ryn_MatarikiForestryGroupMember