Debt Instrument Contractual Facility Borrowing Capacity

No definition available.

Name:	rdi_DebtInstrumentContractualFacilityBorrowingCapacity
Namespace Prefix:	rdi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) in prepaid expenses, and assets classified as other.

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Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
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- Details

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Balance Type:
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- Details

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Borrowings (Union Square Construction Financing) (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
(Increase) decrease in prepaid and other assets	$ 1,131	$ 2,017
Repayment of long-term borrowings	3,889	$ 75,257
Contractual facility	240,626		$ 248,948
Emerald Creek Capital [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	55,000
Union Square Construction Financing [Member]
Debt Instrument [Line Items]
Contractual facility	$ 55,000		$ 55,000
Maturity date	May 06, 2024		May 06, 2024
Floor Rate [Member] \| Emerald Creek Capital [Member]
Debt Instrument [Line Items]
Spread over LIBOR	7.00%
London Interbank Offered Rate (LIBOR) [Member] \| Emerald Creek Capital [Member]
Debt Instrument [Line Items]
Spread over LIBOR	6.90%