Restructuring Costs - Summary of Company's Net Pretax Restructuring Charges (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net	$ 6,868	$ 7,388	$ 10,633	$ 11,677
Wireless [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net	1,312	5,852	4,000	8,706
Enterprise [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net	(3)	(31)	(46)	101
Broadband [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net	219	$ 1,567	1,339	$ 2,870
BNS [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs, net	$ 5,340		$ 5,340