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Discontinued Operations - Summary of Financial Information for Fiber Optic Licensing Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Discontinued Operations, Disposed of by Sale |  |  |  |
Net income (loss) from discontinued operations as presented in the consolidated statements of operations |  | $ (342) | $ 190,621 | $ 27,490
Fiber Optic Licensing Division [Member] |  |  |  |
Discontinued Operations, Disposed of by Sale |  |  |  |
Revenues |  |  | 59,998 | 104,021
Cost of services (including depreciation) |  |  | 24,748 | 39,295
Selling, general and administrative expenses |  | (980) | 12,047 | 16,561
Amortization of intangible assets |  |  | 963 | 1,650
Other income (expense) items that are not major |  |  | 10 | 3
Net income before taxes of discontinued operations related to fiber optic licensing operations related to major classes of income before taxes |  | 980 | 22,250 | 46,518
Pretax gain on the disposal of the fiber optic licensing operations | $ 272,000 |  | 271,833 |
Total pretax gain on fiber optic licensing operations |  | 980 | 294,083 | 46,518
Provision for income taxes related to fiber optic licensing operations |  | 667 | 103,462 | 18,401
Net income (loss) from discontinued operations as presented in the consolidated statements of operations |  | 313 | $ 190,621 | 28,117
Telecommunications [Member] |  |  |  |
Discontinued Operations, Disposed of by Sale |  |  |  |
Net income (loss) from discontinued operations as presented in the consolidated statements of operations |  | $ (655) |  | $ (627)

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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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