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Discontinued Operations - Reconciliation of Carrying Amounts of Major Classes of Assets and Liabilities of Fiber Optic Licensing Operations (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Current assets: |  |
Accounts receivable |  | $ 11,429
Prepaid expenses and other current assets |  | 2,258
Total current assets of fiber optic licensing operations |  | 13,687
Non-current assets: |  |
Property and equipment |  | 380,554
Other intangible assets, net of accumulated amortization |  | 17,009
Goodwill |  | 334,790
Total major classes of non-current assets of fiber optic licensing operations |  | 732,353
Other non-current assets included in fiber optic licensing operations |  | 6,709
Total non-current assets of fiber optic licensing operations |  | 739,062
Current liabilities: |  |
Accounts payable and accrued expenses | $ 15,313 | 21,091
Total current liabilities of fiber optic licensing operations | $ 15,313 | 21,091
Non-current liabilities: |  |
Deferred income taxes |  | 57,108
Long-term deferred revenue |  | 48,231
Total major classes of non-current liabilities of fiber optic licensing operations |  | 105,339
Other non-current liabilities of fiber optic licensing operations |  | 193
Total non-current liabilities of fiber optic licensing operations |  | $ 105,532

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