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v3.23.1

Subsequent Events (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Subsequent Event [Line Items] |  |  |
Repayment of long-term borrowings | $ 15,980 | $ 88,417 | $ 29,896
Contractual facility | 227,633 | 248,948 |
Westpac Bank Corporate Credit Facility [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Contractual facility | 8,777 | 9,465 |
Union Square Construction Financing [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Contractual facility | $ 55,000 | $ 55,000 |

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- Definition Debt Instrument Contractual Facility Borrowing Capacity + References No definition available. + Details
Name: | rdi_DebtInstrumentContractualFacilityBorrowingCapacity
Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DebtInstrumentAxis=rdi_NewZealandCorporateCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DebtInstrumentAxis=rdi_UnitedStatesUnionSquareLineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |