Investment Securities - Trading Securities (Details) - Floating Interest Rate [Member] - Asset-backed Securities [Member] - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Trading Securities, Debt, Amortized Cost | $ 2,211 | $ 2,868 |
| Trading, at fair value | $ 491 | $ 689 |
| Trading Securities, Weighted-Average Yield | 4.41% | 4.24% |