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Pension Plans - Qualified Plan - General Information (Details) - Pension Plan [Member] - Qualified Plan [Member] | 12 Months Ended
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Dec. 31, 2019 age
Defined Benefit Plan Disclosure [Line Items] |
Rate of qualified earnings credited to the account of the participant of benefit plan | 3.00%
Retirement age benefit payable to a terminated vested participant upon retirement | 65
Retirement age for benefit payments, earliest age allowed contingent of minimum service requirement | 55
Number of years of service at the time plan was frozen for the eligibility of benefit payable to terminated vested participant at age 55 | 15 years
Defined benefit plan, funding status | us-gaap:UnderfundedPlanMember

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- Definition Period eligible for benefit to be paid to terminated vested participant. + References No definition available. + Details
Name: | rhp_PeriodEligibleForBenefitToBePaidToTerminatedVestedParticipant
Namespace Prefix: | rhp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of qualified earnings credited to participants under the cash formula of the qualified retirement plan. + References No definition available. + Details
Name: | rhp_RateOfQualifiedEarningsCreditedToAccountOfParticipantOfBenefitPlan
Namespace Prefix: | rhp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Retirement age for benefits under the qualified retirement plan after employee termination. + References No definition available. + Details
Name: | rhp_RetirementAgeForBenefitPayments
Namespace Prefix: | rhp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Retirement age for benefits under the qualified retirement plan after employee termination if the employee had fifteen years of service. + References No definition available. + Details
Name: | rhp_RetirementAgeForBenefitPaymentsEarliestAgeContingentOfMinimumServiceRequirement
Namespace Prefix: | rhp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Indicates status of funding for defined benefit plan designed to provide retirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFundingStatusExtensibleList
Namespace Prefix: | us-gaap_
Data Type: | srt-types:extensibleListItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RetirementPlanTaxStatusAxis=us-gaap_QualifiedPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |