XML 40 R51.htm IDEA: XBRL DOCUMENT v2.3.0.15
Financial Instruments And Investments (Marketable Securities Fair Value And Unrealized Losses) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended12 Months Ended
Sep. 30, 2011
MT
years
securities
Dec. 31, 2010
securities
Marketable Securities Fair Value Less than 12 Months$ 39,055[1]$ 33,816[2]
Marketable Securities Fair Value 12 Months or Longer4,918[1]8,507[2]
Marketable Securities Fair Value Total43,973[1]42,323[2]
Marketable Securities Unrealized Losses Less than 12 Months(3,395)[1](1,245)[2]
Marketable Securities Unrealized Losses 12 Months or Longer(809)[1](592)[2]
Marketable Securities Unrealized Losses Total(4,204)[1](1,837)[2]
Number of investable securities12796
Total Debt Securities [Member]
  
Marketable Securities Fair Value Less than 12 Months18,771[1]26,873[2]
Marketable Securities Fair Value 12 Months or Longer2,663[1]4,204[2]
Marketable Securities Fair Value Total21,434[1]31,077[2]
Marketable Securities Unrealized Losses Less than 12 Months(395)[1](471)[2]
Marketable Securities Unrealized Losses 12 Months or Longer(49)[1](172)[2]
Marketable Securities Unrealized Losses Total(444)[1](643)[2]
Corporate Obligations [Member]
  
Marketable Securities Fair Value Less than 12 Months4,423[1]1,855[2]
Marketable Securities Fair Value 12 Months or Longer92[1]0[2]
Marketable Securities Fair Value Total4,515[1]1,855[2]
Marketable Securities Unrealized Losses Less than 12 Months(159)[1](18)[2]
Marketable Securities Unrealized Losses 12 Months or Longer(4)[1]0[2]
Marketable Securities Unrealized Losses Total(163)[1](18)[2]
Federal Agency Mortgage Backed Securities [Member]
  
Marketable Securities Fair Value Less than 12 Months4,431[1]2,290[2]
Marketable Securities Fair Value 12 Months or Longer0[1]441[2]
Marketable Securities Fair Value Total4,431[1]2,731[2]
Marketable Securities Unrealized Losses Less than 12 Months(28)[1](51)[2]
Marketable Securities Unrealized Losses 12 Months or Longer0[1](27)[2]
Marketable Securities Unrealized Losses Total(28)[1](78)[2]
Municipal Obligations [Member]
  
Marketable Securities Fair Value Less than 12 Months7,979[1]13,145[2]
Marketable Securities Fair Value 12 Months or Longer2,571[1]3,763[2]
Marketable Securities Fair Value Total10,550[1]16,908[2]
Marketable Securities Unrealized Losses Less than 12 Months(180)[1](278)[2]
Marketable Securities Unrealized Losses 12 Months or Longer(45)[1](145)[2]
Marketable Securities Unrealized Losses Total(225)[1](423)[2]
Common Stock [Member]
  
Marketable Securities Fair Value Less than 12 Months20,284[1]6,943[2]
Marketable Securities Fair Value 12 Months or Longer2,255[1]4,303[2]
Marketable Securities Fair Value Total22,539[1]11,246[2]
Marketable Securities Unrealized Losses Less than 12 Months(3,000)[1](774)[2]
Marketable Securities Unrealized Losses 12 Months or Longer(760)[1](420)[2]
Marketable Securities Unrealized Losses Total(3,760)[1](1,194)[2]
U.S. Government Bonds [Member]
  
Marketable Securities Fair Value Less than 12 Months1,938[1]9,583[2]
Marketable Securities Fair Value 12 Months or Longer0[1]0[2]
Marketable Securities Fair Value Total1,938[1]9,583[2]
Marketable Securities Unrealized Losses Less than 12 Months(28)[1](124)[2]
Marketable Securities Unrealized Losses 12 Months or Longer0[1]0[2]
Marketable Securities Unrealized Losses Total$ (28)[1]$ (124)[2]
[1]Includes approximately 127 securities.
[2]Includes approximately 96 securities.