XML 16 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6
Investment Securities Continuous Unrealized Loss (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Corporate bonds [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value, less than 12 months $ 5,597 $ 2,999
Unrealized losses, less than 12 months (1) (1)
Fair value, 12 months or more 0 0
Unrealized losses, 12 months or more 0 0
Total fair value 5,597 2,999
Total unrealized losses (1) (1)
US treasury notes [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value, less than 12 months 42,845  
Unrealized losses, less than 12 months (25)  
Fair value, 12 months or more 0  
Unrealized losses, 12 months or more 0  
Total fair value 42,845  
Total unrealized losses (25)  
Agency securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value, less than 12 months 26,008 1,663
Unrealized losses, less than 12 months (44) (4)
Fair value, 12 months or more 0 0
Unrealized losses, 12 months or more 0 0
Total fair value 26,008 1,663
Total unrealized losses (44) (4)
Municipal bonds [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value, less than 12 months 2,642 324
Unrealized losses, less than 12 months (3) (1)
Fair value, 12 months or more 0 0
Unrealized losses, 12 months or more 0 0
Total fair value 2,642 324
Total unrealized losses (3) (1)
Total fixed income securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value, less than 12 months 77,092 4,986
Unrealized losses, less than 12 months (73) (6)
Fair value, 12 months or more 0 0
Unrealized losses, 12 months or more 0 0
Total fair value 77,092 4,986
Total unrealized losses $ (73) $ (6)