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Income Taxes (Components of Provision for Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current provision:      
Federal $ 6,440 $ 995 $ 69
State 523 195 330
Total current provision 6,963 1,190 399
Deferred provision:      
Federal (1,846) 6,840 7,723
Total deferred provision (1,846) 6,840 7,723
Total income tax expense $ 5,117 $ 8,030 $ 8,122