XML 39 R36.htm IDEA: XBRL DOCUMENT v2.4.0.8
3. Fair Value and Gross Unrealized Losses with Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Tolerable variance Level 2 debt security pricing 1.00%  
Fair Value of Investments with Gross Unrealized Losses in loss position 12 months or more $ 4.2 $ 2.3
Gross unrealized losses for investments in a loss position 12 months or more 0.1 0.1
Gross unrealized losses for investments in a loss position less than 12 months 0.4 0.8
Cost Method Investment, Percentage Owned 35.00%  
Fair Value of Investments with Gross Unrealized Losses in loss position less than 12 months $ 58.1 $ 73.9