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Foreign Currencies - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Schedule of Foreign Currency Balance [Line Items]      
Investment subject to foreign currency fluctuations $ 33,011,000crr_NetInvestmentSubjectToForeignCurrencyFluctuations    
Cumulative foreign currency translation loss, net of deferred income tax benefit (23,371,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax   (22,969,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Amount reclassified to net income 0us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyLossGainOnReclassifiedOfEarningsNetOfTax    
Income taxes (14,042,000)us-gaap_IncomeTaxExpenseBenefit 9,076,000us-gaap_IncomeTaxExpenseBenefit  
Foreign Currency Exchange Loss, Net      
Schedule of Foreign Currency Balance [Line Items]      
Income taxes $ 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ForeignCurrencyGainLossMember