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Accumulated Other Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Mar. 31, 2012
Jun. 30, 2013
Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance       $ 107  
Total other comprehensive income (loss) (35) (162) (55) (10) (55)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance 97     97  
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance 132 [1]     107 [1]  
Other comprehensive income before reclassifications (35) [1]     (10) [1]  
Amount reclassified from accumulated other comprehensive income    [1],[2]        [1],[2]  
Total other comprehensive income (loss) (35) [1]     (10) [1]  
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance $ 97 [1]     $ 97 [1]  
[1] (1)All amounts are net of tax. Amounts in parentheses indicate a reduction of other comprehensive income.
[2] (2)There no amounts reclassified out of other comprehensive income for the three and six months ended June, 2013