2.4.0.84031 - Disclosure - Cash, Cash Equivalents and Short-term Investments (Details 2)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$I2014Q2http://www.sec.gov/CIK0001230276instant2013-07-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$I2013http://www.sec.gov/CIK0001230276instant2013-01-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Available-for-sale securities2false 4p_CashEquivalentsAndShortTermInvestmentsAmortizedCostp_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse3389100033891USD$falsetruefalse2truefalsefalse6627200066272USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the cash equivalents and cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.No definition available.false2Adjusted Cost3false 4us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1us-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-3000-3USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.No definition available.false2Unrealized Losses4false 4p_CashEquivalentsAndShortTermInvestmentsFairValueDisclosurep_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse3389100033891USD$falsefalsefalse2truefalsefalse6626900066269USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash equivalents and short-term investments.No definition available.true2Fair Value5false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false USDtruefalse$I2014Q2_MoneyMarketFundsMemberhttp://www.sec.gov/CIK0001230276instant2013-07-31T00:00:000001-01-01T00:00:00falsefalseMoney market fundsus-gaap_InvestmentTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MoneyMarketFundsMemberus-gaap_InvestmentTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Money market funds6true 3us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Available-for-sale securities7false 4p_CashEquivalentsAndShortTermInvestmentsAmortizedCostp_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1858700018587USD$falsefalsefalse2truefalsefalse3252200032522USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the cash equivalents and cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.No definition available.false2Adjusted Cost8false 4p_CashEquivalentsAndShortTermInvestmentsFairValueDisclosurep_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse1858700018587USD$falsefalsefalse2truefalsefalse3252200032522USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash equivalents and short-term investments.No definition available.true2Fair Value9false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse5false USDtruefalse$I2014Q2_CommercialPaperMemberhttp://www.sec.gov/CIK0001230276instant2013-07-31T00:00:000001-01-01T00:00:00falsefalseCommercial paperus-gaap_InvestmentTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialPaperMemberus-gaap_InvestmentTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial paper10true 3us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Available-for-sale securities11false 4p_CashEquivalentsAndShortTermInvestmentsAmortizedCostp_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1209800012098USD$falsefalsefalse2truefalsefalse2409300024093USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the cash equivalents and cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.No definition available.false2Adjusted Cost12false 4us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1us-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-1000-1USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.No definition available.false2Unrealized Losses13false 4p_CashEquivalentsAndShortTermInvestmentsFairValueDisclosurep_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse1209800012098USD$falsefalsefalse2truefalsefalse2409200024092USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash equivalents and short-term investments.No definition available.true2Fair Value14false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse7false USDtruefalse$I2014Q2_CorporateDebtSecuritiesMemberhttp://www.sec.gov/CIK0001230276instant2013-07-31T00:00:000001-01-01T00:00:00falsefalseCorporate debt securitiesus-gaap_InvestmentTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_InvestmentTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Corporate debt securities15true 3us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Available-for-sale securities16false 4p_CashEquivalentsAndShortTermInvestmentsAmortizedCostp_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse32060003206USD$falsefalsefalse2truefalsefalse96570009657USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the cash equivalents and cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.No definition available.false2Adjusted Cost17false 4us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1us-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-2000-2USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.No definition available.false2Unrealized Losses18false 4p_CashEquivalentsAndShortTermInvestmentsFairValueDisclosurep_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse32060003206USD$falsetruefalse2truefalsefalse96550009655USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash equivalents and short-term investments.No definition available.true2Fair ValuefalseCash, Cash Equivalents and Short-term Investments (Details 2) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.pandora.com/role/DisclosureCashCashEquivalentsAndShortTermInvestmentsDetails2218