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5. ON-BALANCE SHEET DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $)
3 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Loss On Interest Rate Swap    
Before Tax $ (3,295)CRVP_OtherComprehensiveIncomebeforeTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_LossOnInterestRateSwapMember
$ (4,784)CRVP_OtherComprehensiveIncomebeforeTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_LossOnInterestRateSwapMember
Tax Benefit (Expense) 1,318CRVP_TaxBenefitExpense
/ us-gaap_IncomeStatementLocationAxis
= CRVP_LossOnInterestRateSwapMember
1,913CRVP_TaxBenefitExpense
/ us-gaap_IncomeStatementLocationAxis
= CRVP_LossOnInterestRateSwapMember
Net of Tax (1,977)CRVP_OtherComprehensiveIncomenetOfTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_LossOnInterestRateSwapMember
(2,871)CRVP_OtherComprehensiveIncomenetOfTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_LossOnInterestRateSwapMember
Reclassification Adjustment For Loss In Income    
Before Tax 8,119CRVP_OtherComprehensiveIncomebeforeTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_ReclassificationAdjustmentForLossInIncomeMember
9,686CRVP_OtherComprehensiveIncomebeforeTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_ReclassificationAdjustmentForLossInIncomeMember
Tax Benefit (Expense) (3,248)CRVP_TaxBenefitExpense
/ us-gaap_IncomeStatementLocationAxis
= CRVP_ReclassificationAdjustmentForLossInIncomeMember
(3,874)CRVP_TaxBenefitExpense
/ us-gaap_IncomeStatementLocationAxis
= CRVP_ReclassificationAdjustmentForLossInIncomeMember
Net of Tax 4,871CRVP_OtherComprehensiveIncomenetOfTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_ReclassificationAdjustmentForLossInIncomeMember
5,812CRVP_OtherComprehensiveIncomenetOfTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_ReclassificationAdjustmentForLossInIncomeMember
Net Unrealized Gain    
Before Tax 4,824CRVP_OtherComprehensiveIncomebeforeTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_NetUnrealizedGainMember
4,902CRVP_OtherComprehensiveIncomebeforeTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_NetUnrealizedGainMember
Tax Benefit (Expense) (1,930)CRVP_TaxBenefitExpense
/ us-gaap_IncomeStatementLocationAxis
= CRVP_NetUnrealizedGainMember
(1,961)CRVP_TaxBenefitExpense
/ us-gaap_IncomeStatementLocationAxis
= CRVP_NetUnrealizedGainMember
Net of Tax $ 2,894CRVP_OtherComprehensiveIncomenetOfTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_NetUnrealizedGainMember
$ 2,941CRVP_OtherComprehensiveIncomenetOfTax
/ us-gaap_IncomeStatementLocationAxis
= CRVP_NetUnrealizedGainMember