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Discontinued Operations, Assets Held for Sale - Carrying Amounts of Assets and LIabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Total current liabilities of discontinued operations $ 8,685 $ 6,059
Commercial Business Segment    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Accounts receivable 189 813
Total current assets of discontinued operations 189 813
Accounts payable 122 3,115
Accrued expenses and other current liabilities 8,248 2,944
Total current liabilities of discontinued operations $ 8,370 $ 6,059