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Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Federal    
Current
Deferred 3,578 16,374
Increase in valuation allowance 3,578 (16,374)
State and Local    
Current
Deferred (50) 837
Increase in valuation allowance 50 (837)
Change in valuation allowance (3,578) (17,211)
Income tax provision (benefit)