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Fair Value (Details 3) - Collateralized Debt Obligations [Member] - Fair Value, Measurements, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Total realized/unrealized (losses)/gains, January 1 | $ 2,432 | $ 1,968
Included in earnings | 0 | 0
Included in other comprehensive income | 190 | 464
Transfers in and/or (out) of Level 3 | 0 | 0
Ending balance | $ 2,622 | $ 2,432

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