Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Fair value    
Investments available for sale $ 2,018 $ 2,071
Municipal obligations
   
Fair value    
Investments available for sale 524 638
U.S. government security funds
   
Fair value    
Investments available for sale 981 986
Equity securities
   
Fair value    
Investments available for sale 513 447
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets
   
Fair value    
Investment securities 1,151 1,276
Total assets measured at fair value on a recurring basis 2,645 2,709
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets | U.S. government security funds
   
Fair value    
Investments available for sale 981 986
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets | Equity securities
   
Fair value    
Investments available for sale 513 447
Recurring basis | Level 2 - Significant Other Observable Inputs
   
Fair value    
Total assets measured at fair value on a recurring basis 524 638
Recurring basis | Level 2 - Significant Other Observable Inputs | Municipal obligations
   
Fair value    
Investments available for sale 524 638
Recurring basis | Total
   
Fair value    
Investment securities 1,151 1,276
Total assets measured at fair value on a recurring basis 3,169 3,347
Recurring basis | Total | Municipal obligations
   
Fair value    
Investments available for sale 524 638
Recurring basis | Total | U.S. government security funds
   
Fair value    
Investments available for sale 981 986
Recurring basis | Total | Equity securities
   
Fair value    
Investments available for sale $ 513 $ 447