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Derivative Financial Instruments (Balance Sheet Information) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative, Fair Value, Net | $ 312 | $ 22
Other Investment at Fair Value [Member] | Foreign currency forward contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Fair Value, Net | 190 |
Investments-trading [Member] | TBAs [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Fair Value, Net | 188 | 35
Trading securities sold, not yet purchased [Member] | TBAs [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Fair Value, Net | $ (66) | $ (13)

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