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Accumulated Other Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Changes in balances of each component of accumulated other comprehensive income, net of taxes [Roll Forward]    
Beginning balance $ 6,204  
Total other comprehensive income (loss), net of tax 866 (1,809)
Ending balance 7,070  
Unrealized Gains on Available-for-Sale Securities [Member]
   
Changes in balances of each component of accumulated other comprehensive income, net of taxes [Roll Forward]    
Beginning balance 6,204  
Other comprehensive income before reclassifications 936  
Amounts reclassified from accumulated other comprehensive income (70)  
Total other comprehensive income (loss), net of tax 866  
Ending balance $ 7,070