Balance Sheet Components - Other Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Deferred installation revenue	$ 74,452	$ 61,399
Customer deposits	16,598	13,894
Derivative instruments	34,466	10,819
Deferred recurring revenue	12,848	18,704
Deferred rent	6,546	4,158
Dividends payable	11,181	11,999
Asset retirement obligations	1,716	10,036
Other current liabilities	2,107	2,131
Other current liabilities, total	$ 159,914	$ 133,140