XML 72 R55.htm IDEA: XBRL DOCUMENT v3.6.0.2
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)