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Income Taxes Gross Activity of Unrecognized Tax Benefits Related to Uncertain Tax Positions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Income Tax Contingency [Line Items]    
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 700 $ 0
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions 1,038  
Unrecognized Tax Benefits $ 1,038