XML 80 R59.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Summary Of Significant Accounting Policies (Summary Of Currency Exchange Rates) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Australian Dollar [Member] | Spot Rate [Member] |  |  |
Currency Exchange Rates [Line Items] |  |  |
Foreign currency exchange rate | 0.7230 | 0.7286 | 0.8173
Australian Dollar [Member] | Average Rate [Member] |  |  |
Currency Exchange Rates [Line Items] |  |  |
Foreign currency exchange rate | 0.7440 | 0.7524 | 0.9027
New Zealand Dollar [Member] | Spot Rate [Member] |  |  |
Currency Exchange Rates [Line Items] |  |  |
Foreign currency exchange rate | 0.6958 | 0.6842 | 0.7796
New Zealand Dollar [Member] | Average Rate [Member] |  |  |
Currency Exchange Rates [Line Items] |  |  |
Foreign currency exchange rate | 0.6973 | 0.7004 | 0.8306

X
- Definition Currency Exchange Rates [Line Items] + References No definition available. + Details
Name: | rdi_CurrencyExchangeRatesLineItems
Namespace Prefix: | rdi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Foreign Currency Exchange Rate + References No definition available. + Details
Name: | rdi_ForeignCurrencyExchangeRate
Namespace Prefix: | rdi_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CurrencyAxis=currency_AUD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=rdi_SpotRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=rdi_AverageRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_NZD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |