Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Narrative) (Details)

v2.4.1.9
Derivative Financial Instruments (Narrative) (Details) (Cash Flow Hedging [Member], Designated as Hedging Instrument [Member], Treasury Lock [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2005
derivative_agreement
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Treasury Lock [Member]
 
Derivative [Line Items]  
Number of instruments held 2us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_TreasuryLockMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Debt instrument, term 10 years
Proceeds from hedge, financing activities $ 3.2us-gaap_ProceedsFromHedgeFinancingActivities
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_TreasuryLockMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember