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Investments In And Advances To Unconsolidated Joint Ventures And Entities (Summary Of Equity Earnings (Loss) From Investments In Unconsolidated Joint Ventures And Entities) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Schedule of Equity Method Investments [Line Items] |  |  |
Total equity earnings | $ 1,015 us-gaap_IncomeLossFromEquityMethodInvestments | $ 1,369 us-gaap_IncomeLossFromEquityMethodInvestments | $ 1,621 us-gaap_IncomeLossFromEquityMethodInvestments
Rialto Distribution [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investor share of earnings | 120 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember | 159 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember | 199 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember
Rialto Cinemas [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investor share of earnings | 297 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoCinemasMember | 221 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoCinemasMember | 209 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoCinemasMember
205-209 East 57th Street Associates, LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investor share of earnings |  | (1)rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_TwoZeroFiveTwoZeroNineEastFiftySeventhStreetAssociatesLlcMember | 27 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_TwoZeroFiveTwoZeroNineEastFiftySeventhStreetAssociatesLlcMember
Mt. Gravatt [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investor share of earnings | $ 598 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember | $ 990 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember | $ 1,186 rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember

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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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