Quarterly report pursuant to Section 13 or 15(d)

Investments (Details 2)

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Investments (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Trading securities portfolio          
Trading securities portfolio $ 1,151   $ 1,151   $ 1,276
Losses 12 26      
Gains     33 60  
U.S. government security funds
         
Trading securities portfolio          
Net Unrealized Losses $ 14   $ 14   $ 9