Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details)

v2.4.0.6
Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Fair Value Measurements    
Available-for-sale securities $ 4,411 $ 5,375
Certificates of deposit
   
Fair Value Measurements    
Available-for-sale securities 4,411 5,375
Recurring basis | Fair Value | Certificates of deposit
   
Fair Value Measurements    
Available-for-sale securities 4,411 5,375
Recurring basis | Significant Other Observable Inputs (Level 2) | Certificates of deposit
   
Fair Value Measurements    
Available-for-sale securities $ 4,411 $ 5,375