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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Unrecognized tax benefits at beginning of year $ 0 $ 0 $ 0
Gross increases for tax positions taken in current period 0 0 0
Gross increases and decreases for positions taken in prior periods 11,626 0 0
Unrecognized tax benefits at end of the year $ 11,626 $ 0 $ 0