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Cash, Cash Equivalents and Investments (Narrative) (Details) (USD $) | 3 Months Ended | 12 Months Ended
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Aug. 31, 2014 | Nov. 30, 2014 | Nov. 30, 2013 | Nov. 30, 2012
Cash, Cash Equivalents and Investments [Line Items] |  |  |  |
Redemptions and sales of auction rate securities - available-for-sale | $ 26,200,000 prgs_RedemptionsOfAuctionRateSecuritiesAvailableForSale | $ 26,196,000 prgs_RedemptionsOfAuctionRateSecuritiesAvailableForSale | $ 25,000 prgs_RedemptionsOfAuctionRateSecuritiesAvailableForSale | $ 8,955,000 prgs_RedemptionsOfAuctionRateSecuritiesAvailableForSale
Realized loss on sale of auction rate securities | 2,600,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet |  |  |
Investments in auction rate securities |  | 0 us-gaap_LongTermInvestments | 24,761,000 us-gaap_LongTermInvestments |
Auction Rate Securities [Member] |  |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |  |
Investments in auction rate securities |  |  | 24,800,000 us-gaap_LongTermInvestments / prgs_CashCashEquivalentsAndInvestmentsAxis = us-gaap_AuctionRateSecuritiesMember |
Unrealized losses |  |  | 4,000,000 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / prgs_CashCashEquivalentsAndInvestmentsAxis = us-gaap_AuctionRateSecuritiesMember |
Percentage of par value to be received after renouncing claim |  | 80.00%prgs_AvailableforsaleSecuritiesPercentageofParValueReceivedafterRenouncingClaim / prgs_CashCashEquivalentsAndInvestmentsAxis = us-gaap_AuctionRateSecuritiesMember |  |
Percentage of par to be received if insurance rights retained |  | 65.00%prgs_AvailableforsaleSecuritiesRetentionofInsuranceRightsPercentageofParValueReceived / prgs_CashCashEquivalentsAndInvestmentsAxis = us-gaap_AuctionRateSecuritiesMember |  |
Percentage of par value received on investment |  | 80.00%prgs_AvailableforsaleSecuritiesPercentageofParValueReceivedonInvestment / prgs_CashCashEquivalentsAndInvestmentsAxis = us-gaap_AuctionRateSecuritiesMember |  |
Realized losses on investments |  | $ 400,000 us-gaap_RealizedInvestmentGainsLosses / prgs_CashCashEquivalentsAndInvestmentsAxis = us-gaap_AuctionRateSecuritiesMember |  |

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- Definition Available-for-sale Securities, Percentage of Par Value Received after Renouncing Claim + References No definition available. + Details
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- Definition Available-for-sale Securities, Percentage of Par Value Received on Investment + References No definition available. + Details
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- Definition Available-for-sale Securities, Retention of Insurance Rights, Percentage of Par Value Received + References No definition available. + Details
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- Definition Redemptions Of Auction Rate Securities Available For Sale. + References No definition available. + 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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- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 325 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6485959&loc=d3e22529-158502 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 3 -Subparagraph a -Article 7 + Details
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