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Note 20. Subsequent Events Subsequent Events (Details) - shares
Feb. 24, 2016
Dec. 31, 2015
Dec. 31, 2014
Subsequent Event [Line Items]      
Shares of common stock outstanding   147,000,000 146,382,923
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Number of Shares Authorized to be Repurchased 275,000,000