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Noncontrolling Interests (Summary Of Changes In Controlling And Noncontrolling Stockholders’ Equity) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Noncontrolling Interest [Line Items] |  |
Equity, beginning balance | $ 132,298 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | $ 121,747 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Net income (loss) | 3,102 us-gaap_ProfitLoss | (254)us-gaap_ProfitLoss
Increase in additional paid in capital | 383 us-gaap_StockholdersEquityPeriodIncreaseDecrease | 106 us-gaap_StockholdersEquityPeriodIncreaseDecrease
Treasury stock purchased | (1,828)us-gaap_TreasuryStockValueAcquiredCostMethod |
Contributions from noncontrolling stockholders - SHP | 17 rdi_CashAndNoncashContributionsFromNoncontrollingStockholders |
Distributions to noncontrolling stockholders | (90)us-gaap_PaymentsToMinorityShareholders | (54)us-gaap_PaymentsToMinorityShareholders
Accumulated other comprehensive income (loss) | (9,862)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest | 7,693 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
Equity, ending balance | 124,020 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 129,238 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Controlling Stockholders' Equity [Member] |  |
Noncontrolling Interest [Line Items] |  |
Equity, beginning balance | 127,686 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember | 117,140 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember
Net income (loss) | 3,118 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember | (215)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember
Increase in additional paid in capital | 383 us-gaap_StockholdersEquityPeriodIncreaseDecrease / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember | 4 us-gaap_StockholdersEquityPeriodIncreaseDecrease / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember
Treasury stock purchased | (1,828)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember |
Accumulated other comprehensive income (loss) | (9,837)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember | 7,774 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember
Equity, ending balance | 119,522 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember | 124,703 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = rdi_ControllingStockholdersEquityMember
Noncontrolling Stockholders' Equity [Member] |  |
Noncontrolling Interest [Line Items] |  |
Equity, beginning balance | 4,612 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 4,607 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Net income (loss) | (16)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (39)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Increase in additional paid in capital |  | 102 us-gaap_StockholdersEquityPeriodIncreaseDecrease / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Contributions from noncontrolling stockholders - SHP | 17 rdi_CashAndNoncashContributionsFromNoncontrollingStockholders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Distributions to noncontrolling stockholders | (90)us-gaap_PaymentsToMinorityShareholders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (54)us-gaap_PaymentsToMinorityShareholders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Accumulated other comprehensive income (loss) | (25)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (81)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Equity, ending balance | $ 4,498 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 4,535 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember

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- Definition Amount after tax of other comprehensive (income) loss attributable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 + Details
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