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Pension Plans - Qualified Plan - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2018
Retirement Benefits [Abstract] |
Minimum time period for expected rate of return | 10 years
Maximum time period for expected rate of return | 20 years

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- Definition Maximum future years for which current portfolio asset allocations are evaluated for future returns. + References No definition available. + Details
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Namespace Prefix: | rhp_
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- Definition Minimum future years for which current portfolio asset allocations are evaluated for future returns. + References No definition available. + Details
Name: | rhp_MinimumTimePeriodForExpectedRateOfReturn
Namespace Prefix: | rhp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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