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Fair Value Fair Value (Private Equity Level 3 Fair Value Measurements) (Details) - Private Equity Technology Media and Telecommunications - Recurring
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Quantitative information about Level 3 fair value measurements [Abstract]  
Fair value $ 9,527
Marketability discount 30.00%
Minimum  
Quantitative information about Level 3 fair value measurements [Abstract]  
Revenue multiple 2.5
Maximum  
Quantitative information about Level 3 fair value measurements [Abstract]  
Revenue multiple 4.8