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

Number Of Loan Tranches

+ References

No definition available.

+ Details

Name:	rdi_NumberOfLoanTranches
Namespace Prefix:	rdi_
Data Type:	xbrli:integerItemType
Balance Type:	na
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

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Details

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

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=rdi_BankOfOzarksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=rdi_TammanyMezzInvestorLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=rdi_MezzanineLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Borrowings (Union Square Construction Financing) (Narrative) (Details) $ in Thousands		12 Months Ended
	Dec. 29, 2016 USD ($) loan	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Contractual facility		$ 252,929	$ 271,732
Union Square Construction Financing [Member]
Debt Instrument [Line Items]
Contractual facility	$ 57,500	57,500
Advanced-to-Date		27,182
Facility Limit		57,500
Union Square Construction Financing [Member] \| Bank Of The Ozarks [Member]
Debt Instrument [Line Items]
Contractual facility	$ 50,000
Number of loan tranches \| loan	3
Union Square Construction Financing [Member] \| Bank Of The Ozarks [Member] \| Senior Loan [Member]
Debt Instrument [Line Items]
Advanced-to-Date		8,000		$ 8,000
Facility Limit		8,000		8,000
Union Square Construction Financing [Member] \| Tammany Mezz Investor, LLC [Member] \| Mezzanine Loan [Member]
Debt Instrument [Line Items]
Contractual facility				$ 7,500
Advanced-to-Date		7,500
Facility Limit		$ 7,500