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net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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Includes unrealized gains (losses) on derivatives still held in position as of the reporting date for electric derivatives of $(15.6) million and $6.2 million for the three months ended June 30, 2013 and 2012, respectively. 2 Income Statement location: Unrealized (gain) loss on derivative instruments, net. Includes unrealized gains (losses) on derivatives still held in position as of the reporting date for electric derivatives of $(14.2) million and $(12.8) million for the six months ended June 30, 2013 and 2012, respectively.32The Company had no purchases, sales or issuances during the reported periods.falseFair Value Measurements Unobservable Input Reconciliation (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.pugetenergy.com/role/FairValueMeasurementsUnobservableInputReconciliationDetails2515