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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 | Feb. 28, 2015 | Nov. 30, 2014
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Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | $ 211,080 prgs_CashCashEquivalentsAndInvestmentsCostBasis | $ 283,182 prgs_CashCashEquivalentsAndInvestmentsCostBasis
Unrealized Gains | 84 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 86 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Unrealized Losses | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Fair Value | 211,164 prgs_CashCashEquivalentsAndInvestmentsFairValue | 283,268 prgs_CashCashEquivalentsAndInvestmentsFairValue
State and municipal bond obligations [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | 24,045 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 20,100 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Unrealized Gains | 84 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 86 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Unrealized Losses | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 0 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Fair Value | 24,129 prgs_CashCashEquivalentsAndInvestmentsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember | 20,186 prgs_CashCashEquivalentsAndInvestmentsFairValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MunicipalBondsMember
Cash [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | 144,157 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 195,189 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Fair Value | 144,157 prgs_CashCashEquivalentsAndInvestmentsFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember | 195,189 prgs_CashCashEquivalentsAndInvestmentsFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_CashMember
Money market funds [Member] |  |
Cash, Cash Equivalents and Investments [Line Items] |  |
Amortized Cost Basis | 42,878 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember | 67,893 prgs_CashCashEquivalentsAndInvestmentsCostBasis / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember
Fair Value | $ 42,878 prgs_CashCashEquivalentsAndInvestmentsFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember | $ 67,893 prgs_CashCashEquivalentsAndInvestmentsFairValue / us-gaap_CashAndCashEquivalentsAxis = us-gaap_MoneyMarketFundsMember

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- Definition Cash, Cash Equivalents, And Investments, Cost Basis. + References No definition available. + Details
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- Definition Fair value of cash, cash equivalent and investements + References No definition available. + Details
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity 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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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity 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 (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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