Fair Value (Fair Value, Assets Measured on Recurring Basis Using Significant Unobservable Inputs (Level 3)) (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Fair Value [Abstract] | ||
| Beginning balance as of January 1 | $ 14,598 | $ 17,517 |
| Sales | $ (370) | $ (3,490) |
| Settlements | ||
| Purchases | ||
| Issuances | ||
| Total realized/unrealized gains included in net income | ||
| Net gains included in other comprehensive income | $ (141) | $ 571 |
| Transfers into Level 3 | ||
| Transfers out of Level 3 | ||
| Ending balance as of December 31 | $ 14,087 | $ 14,598 |