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Income Taxes (Components of income tax expense (benefit)) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract    
Deferred Income Tax Expense (Benefit) $ 2,033 $ (613)
Income Tax Expense (Benefit) $ 5,661 $ 979