Quarterly report pursuant to Section 13 or 15(d)

Investments (Details 2)

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Investments (Details 2) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Trading securities portfolio      
Trading securities portfolio $ 1,131   $ 1,038
Gains 21 $ 44  
U.S. government security funds      
Trading securities portfolio      
Net Unrealized Losses $ 10   $ 15