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10. Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Effective tax rate 38.00% 39.00%
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit $ 3.5  
U.S. Federal [Member]    
Statutory Rates 35.00% 35.00%