Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v2.4.0.6
Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Fair value measurements    
Investments available for sale $ 2,192 $ 5,677
Municipal obligations
   
Fair value measurements    
Investments available for sale 745 1,209
U.S. government security funds
   
Fair value measurements    
Investments available for sale 986 983
Short-term deposits
   
Fair value measurements    
Investments available for sale   3,104
Equity securities
   
Fair value measurements    
Investments available for sale 461 381
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets
   
Fair value measurements    
Investment securities 1,317 1,429
Total assets measured at fair value on a recurring basis 2,764 2,793
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets | U.S. government security funds
   
Fair value measurements    
Investments available for sale 986 983
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets | Equity securities
   
Fair value measurements    
Investments available for sale 461 381
Recurring basis | Level 2 - Significant Other Observable Inputs
   
Fair value measurements    
Total assets measured at fair value on a recurring basis 745 4,313
Recurring basis | Level 2 - Significant Other Observable Inputs | Municipal obligations
   
Fair value measurements    
Investments available for sale 745 1,209
Recurring basis | Level 2 - Significant Other Observable Inputs | Short-term deposits
   
Fair value measurements    
Investments available for sale   3,104
Recurring basis | Total
   
Fair value measurements    
Investment securities 1,317 1,429
Total assets measured at fair value on a recurring basis 3,509 7,106
Recurring basis | Total | Municipal obligations
   
Fair value measurements    
Investments available for sale 745 1,209
Recurring basis | Total | U.S. government security funds
   
Fair value measurements    
Investments available for sale 986 983
Recurring basis | Total | Short-term deposits
   
Fair value measurements    
Investments available for sale   3,104
Recurring basis | Total | Equity securities
   
Fair value measurements    
Investments available for sale $ 461 $ 381