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Discontinued Operations - Summary of Financial Information for Fiber Optic Licensing Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Discontinued Operations, Disposed of by Sale |  |  |  |
Net income from discontinued operations as presented in the statements of operations | $ 605 | $ 173,212 | $ 605 | $ 193,109
Fiber Optic Licensing Division [Member] |  |  |  |
Discontinued Operations, Disposed of by Sale |  |  |  |
Revenues |  | 8,736 |  | 59,998
Cost of services (including depreciation) |  | 3,037 |  | 24,748
Selling, general and administrative expenses | (980) | 366 | (980) | 10,247
Amortization of intangible assets |  | 138 |  | 963
Other income (expense) items that are not major |  |  |  | 10
Income before taxes of discontinued operations | 980 | 5,195 | 980 | 24,050
Pretax gain on the disposal of the fiber optic licensing operations |  | 271,833 |  | 271,833
Total pretax gain on fiber optic licensing operations | 980 | 277,028 | 980 | 295,883
Provision for income taxes related to discontinued operations | 375 | 103,816 | 375 | 102,774
Net income from discontinued operations as presented in the statements of operations | $ 605 | $ 173,212 | $ 605 | $ 193,109

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- Definition Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 + Details
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