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Employee Benefit Plans - Defined Contribution Plans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract] |  |  |
Cost recognized | $ 0.7 | $ 1.6 | $ 4.4
Amount of employer and related party securities included in plan assets | 11.1 | 16.3 |
Contributions for 401k plan enhancement | $ 0.4 | $ 0.5 | $ 1.1

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- Definition For defined contribution plans, the amount of employer securities or securities of parties related to the employer that are included in plan assets. + References No definition available. + Details
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- Definition Defined Contribution Plan, Contributions for 401(k) Plan Enhancement + References No definition available. + Details
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Namespace Prefix: | ryn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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