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Income Taxes - Components of Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current Income Tax Expense (Benefit) [Abstract]      
Current Federal $ 781 $ 130 $ 1,244
Current State 543 71 601
Current Total 1,324 201 1,845
Deferred Income Tax Expense (Benefit) [Abstract]      
Deferred Federal 0 0 0
Deferred State 0 0 0
Deferred Total 0 0 0
Total federal income tax expense (benefit), continuing operations 781 130 1,244
Total state and local income tax expense (benefit), continuing operations 543 71 601
Total income tax provision from continuing operations 1,324 201 1,845
Federal income tax expense (benefit), discontinued operations (3) (1) (1,114)
State and local income tax expense (benefit), discontinued operations (5) 268 2,058
Total income tax provision from discontinued operations $ (8) $ 267 $ 944