Restructuring Costs - Summary of Company's Net Pretax Restructuring Charges (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]    
Restructuring costs, net $ 1,871 $ 1,980
Wireless [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring costs, net 1,761 1,238
Enterprise [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring costs, net 37 214
Broadband [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring costs, net $ 73 $ 528