Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations - Summary of Financial Information for Fiber Optic Licensing Operations (Detail)

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Discontinued Operations - Summary of Financial Information for Fiber Optic Licensing Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Major classes of line items constituting pretax income from fiber optic licensing operations:        
Revenues $ 25,692 $ 26,341 $ 51,262 $ 53,467
Cost of services (including depreciation) 10,896 9,102 21,711 20,211
Selling, general and administrative expenses 5,106 4,230 9,881 8,672
Amortization of intangible assets 413 413 825 825
Other income (expense) items that are not major 9   10 2
Net income before taxes of discontinued operations related to fiber optic licensing operations related to major classes of income before taxes 9,286 12,596 18,855 23,761
Provision for (benefit from) income taxes (4,816) 4,967 (1,042) 9,166
Net income from discontinued operations related to fiber optic licensing operations as presented in the statements of operations $ 14,102 $ 7,629 $ 19,897 $ 14,595