v2.4.0.8
Available for Sale Securities (Schedule of Available-for-sale Securities in Continuous Unrealized Loss Position) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Fair Value:    
Less Than or Equal to One Year $ 5,987 $ 1,152
More Than One Year 289 343
Gross Unrealized Losses:    
Less Than or Equal to One Year (96) (6)
More Than One Year (4) (10)
U.S. Treasury securities and obligations of U.S. government authorities and agencies
   
Fair Value:    
Less Than or Equal to One Year 3,754 612
More Than One Year 287 0
Gross Unrealized Losses:    
Less Than or Equal to One Year (52) (3)
More Than One Year (4) 0
Corporate securities
   
Fair Value:    
Less Than or Equal to One Year 2,233 540
More Than One Year 0 149
Gross Unrealized Losses:    
Less Than or Equal to One Year (44) (3)
More Than One Year 0 (2)
Asset-backed securities
   
Fair Value:    
Less Than or Equal to One Year 0 0
More Than One Year 2 194
Gross Unrealized Losses:    
Less Than or Equal to One Year 0 0
More Than One Year $ 0 $ (8)