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Fair Value - Level 3 Financial Assets (Details) - Receivable from sold investment
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance at beginning of period $ 0
Realized gains(losses) during period 0
Unrealized gains (losses) during the period 0
Purchases 0
Sales 0
Settlements 0
Issuances 5,789
Transfers in or (out) of Level 3 0
Balance at end of period $ 5,789