DEBT (Schedule of Long Term Maturities) (Details) $ in Thousands	Sep. 30, 2017 USD ($)
Debt Disclosure [Abstract]
2017	$ 0
2018	0
2019	0
2020	50,000
2021	0
Thereafter	983,406
Total Debt	$ 1,033,406

Long-term Debt, Excluding Debt Issuance Costs and Premiums or Discounts

No definition available.

Name:	ryn_LongtermDebtExcludingDebtIssuanceCostsandPremiumDiscounts
Namespace Prefix:	ryn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year, Excluding Debt Issuance Costs and Premiums or Discounts

No definition available.

Name:	ryn_LongtermDebtMaturitiesRepaymentsofPrincipalRemainderofFiscalYearExcludingDebtIssuanceCostsandPremiumDiscounts
Namespace Prefix:	ryn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-term Debt, Maturities, Repayments of Principal after Year Five, Excluding Debt Issuance Costs and Premiums or Discounts

No definition available.

Name:	ryn_LongtermDebtMaturitiesRepaymentsofPrincipalafterYearFiveExcludingDebtIssuanceCostsandPremiumDiscounts
Namespace Prefix:	ryn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-term Debt, Maturities, Repayments of Principal in Year Five, Excluding Debt Issuance Costs and Premiums or Discounts

No definition available.

Name:	ryn_LongtermDebtMaturitiesRepaymentsofPrincipalinYearFiveExcludingDebtIssuanceCostsandPremiumDiscounts
Namespace Prefix:	ryn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-term Debt, Maturities, Repayments of Principal in Year Four, Excluding Debt Issuance Costs and Premiums or Discounts

No definition available.

Name:	ryn_LongtermDebtMaturitiesRepaymentsofPrincipalinYearFourExcludingDebtIssuanceCostsandPremiumDiscounts
Namespace Prefix:	ryn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-term Debt, Maturities, Repayments of Principal in Year Three, Excluding Debt Issuance Costs and Premiums or Discounts

No definition available.

Name:	ryn_LongtermDebtMaturitiesRepaymentsofPrincipalinYearThreeExcludingDebtIssuanceCostsandPremiumDiscounts
Namespace Prefix:	ryn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Long-term Debt, Maturities, Repayments of Principal in Year Two, Excluding Debt Issuance Costs and Premiums or Discounts

No definition available.

Name:	ryn_LongtermDebtMaturitiesRepaymentsofPrincipalinYearTwoExcludingDebtIssuanceCostsandPremiumDiscounts
Namespace Prefix:	ryn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

No definition available.

Name:	us-gaap_DebtDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration