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Cash, Cash Equivalents and Investments (Summary Of Cash, Cash Equivalents And Trading And Available-For-Sale Investments) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Nov. 30, 2014 | Nov. 30, 2013
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | $ 283,182 prgs_CashCashEquivalentsAndInvestmentsCostBasis | $ 260,406 prgs_CashCashEquivalentsAndInvestmentsCostBasis
Realized Losses | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | (380)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Unrealized Gains | 86 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 164 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Unrealized Losses | 0 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | (3,989)us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Fair Value | 283,268 prgs_CashCashEquivalentsAndInvestmentsAtFairValue | 256,201 prgs_CashCashEquivalentsAndInvestmentsAtFairValue
State And Municipal Bond Obligations [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | 20,100 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 30,938 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Realized Losses | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Unrealized Gains | 86 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 164 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Unrealized Losses | 0 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 0 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Fair Value | 20,186 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 31,102 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Auction Rate Securities - Municipal Bonds [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis |  | 27,150 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesMunicipalBondsMember
Realized Losses |  | (380)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesMunicipalBondsMember
Unrealized Gains |  | 0 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesMunicipalBondsMember
Unrealized Losses |  | (3,317)us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesMunicipalBondsMember
Fair Value |  | 23,453 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesMunicipalBondsMember
Auction Rate Securities - Student Loans [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis |  | 3,500 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesStudentLoansMember
Realized Losses |  | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesStudentLoansMember
Unrealized Gains |  | 0 us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesStudentLoansMember
Unrealized Losses |  | (672)us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesStudentLoansMember
Fair Value |  | 2,828 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = prgs_AuctionRateSecuritiesStudentLoansMember
Cash [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | 195,189 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 144,305 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Fair Value | 195,189 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 144,305 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Money Market Funds [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | 67,893 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember | 54,513 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember
Fair Value | $ 67,893 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember | $ 54,513 prgs_CashCashEquivalentsAndInvestmentsAtFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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