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11. Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Effective tax rate (36.00%) 23.00% 30.00% 28.00%
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit $ 1.4   $ 1.4  
U.S. Federal [Member]
       
Statutory Rates 35.00% 35.00% 35.00% 35.00%