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Investments (Other Long Term Investments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Other Long-Term Investments $ 162,783us-gaap_OtherLongTermInvestments $ 60,585us-gaap_OtherLongTermInvestments
Joint Ventures And Limited Partnerships [Member]    
Other Long-Term Investments 68,225us-gaap_OtherLongTermInvestments
/ cik881453_MajorTypesOfInvestmentSecuritiesAxis
= cik881453_JointVenturesAndLimitedPartnershipsMember		 60,585us-gaap_OtherLongTermInvestments
/ cik881453_MajorTypesOfInvestmentSecuritiesAxis
= cik881453_JointVenturesAndLimitedPartnershipsMember
Derivative [Member]    
Other Long-Term Investments $ 94,558us-gaap_OtherLongTermInvestments
/ cik881453_MajorTypesOfInvestmentSecuritiesAxis
= us-gaap_DerivativeMember		 $ 0us-gaap_OtherLongTermInvestments
/ cik881453_MajorTypesOfInvestmentSecuritiesAxis
= us-gaap_DerivativeMember