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Assets Held for Sale (Assets and Liabilities Held for Sale) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Current assets held for sale: |  |
Cash and equivalents | $ 69 | $ 42
Accounts receivable | 1,709 | 5,726
Other current assets | 243 | 571
Current assets held for sale | 2,021 | 6,339
Long-term assets held for sale: |  |
Property and equipment | 12,617 | 33,624
Goodwill |  | 244
Other assets | 2 | 121
Long-term assets held for sale | 12,619 | 33,989
Current liabilities held for sale: |  |
Accounts payable | 834 | 1,320
Accrued liabilities | 314 | 1,811
Deferred revenue | 1,107 | 252
Current liabilities held for sale | $ 2,255 | $ 3,383

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