Annual report pursuant to Section 13 and 15(d)

Discontinued Operations - Reconciliation of Carrying Amounts of Major Classes of Assets and Liabilities of Fiber Optic Licensing Operations (Detail)

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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