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Income Taxes Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current:      
Federal $ 3,723 $ 50 $ (525)
State 3,924 (1,146) 3,093
Deferred:      
Federal 16,109 28,493 11,743
State (484) (2,426) (176)
Income Tax Expense (Benefit) $ 23,272 $ 24,971 $ 14,135