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Business Segments (Results Of Operations For Each Of Our Principal Business Segments) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 segment | Mar. 31, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Revenue | $ 60,585 rdi_SegmentReportingInformationOperatingRevenue | $ 58,053 rdi_SegmentReportingInformationOperatingRevenue
Operating expense | 47,281 rdi_SegmentReportingInformationOperatingExpenses | 46,765 rdi_SegmentReportingInformationOperatingExpenses
Depreciation and amortization | 3,672 rdi_SegmentReportingInformationDepreciationAndAmortization | 3,714 rdi_SegmentReportingInformationDepreciationAndAmortization
General and administrative expense | 1,002 rdi_SegmentReportingInformationGeneralAndAdministrativeExpenses | 1,071 rdi_SegmentReportingInformationGeneralAndAdministrativeExpenses
Segment operating income | 8,630 rdi_SegmentOperatingIncome | 6,503 rdi_SegmentOperatingIncome
Number of reportable business segments | 2 us-gaap_NumberOfReportableSegments |
Intersegment Eliminations [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Revenue | (1,718)rdi_SegmentReportingInformationOperatingRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | (1,950)rdi_SegmentReportingInformationOperatingRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember
Operating expense | (1,718)rdi_SegmentReportingInformationOperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | (1,950)rdi_SegmentReportingInformationOperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember
Cinema [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Revenue | 56,899 rdi_SegmentReportingInformationOperatingRevenue / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | 53,424 rdi_SegmentReportingInformationOperatingRevenue / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Operating expense | 46,859 rdi_SegmentReportingInformationOperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | 45,740 rdi_SegmentReportingInformationOperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Depreciation and amortization | 2,827 rdi_SegmentReportingInformationDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | 2,796 rdi_SegmentReportingInformationDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
General and administrative expense | 874 rdi_SegmentReportingInformationGeneralAndAdministrativeExpenses / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | 898 rdi_SegmentReportingInformationGeneralAndAdministrativeExpenses / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Segment operating income | 6,339 rdi_SegmentOperatingIncome / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | 3,990 rdi_SegmentOperatingIncome / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Real Estate [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Revenue | 5,404 rdi_SegmentReportingInformationOperatingRevenue / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember | 6,579 rdi_SegmentReportingInformationOperatingRevenue / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember
Operating expense | 2,140 rdi_SegmentReportingInformationOperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember | 2,975 rdi_SegmentReportingInformationOperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember
Depreciation and amortization | 845 rdi_SegmentReportingInformationDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember | 918 rdi_SegmentReportingInformationDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember
General and administrative expense | 128 rdi_SegmentReportingInformationGeneralAndAdministrativeExpenses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember | 173 rdi_SegmentReportingInformationGeneralAndAdministrativeExpenses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember
Segment operating income | $ 2,291 rdi_SegmentOperatingIncome / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember | $ 2,513 rdi_SegmentOperatingIncome / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RealEstateMember

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Details
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