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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Tax Disclosure [Abstract]        
Income tax expense $ 44 $ 113 $ 151 $ 155
Effective tax rate (1.00%) (3.00%) (1.00%) (5.00%)