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Fair Value Disclosures (Narrative) (Details) (Private Equity and Similar Investments [Member])
9 Months Ended
Sep. 30, 2013
Multiple
Yr
Private Equity and Similar Investments [Member]
 
Weighted average remaining life of private equity and similar investments, in years 3
Fair value inputs earnings before interest taxes depreciation and amortization multiple lower range 2
Fair value inputs earnings before interest taxes depreciation and amortization multiple upper range 10
Fair value inputs earnings before interest taxes depreciation and amortization multiple weighted average 7