Costs Associated with Exit and Restructuring Activities - Summary of Exit and Restructuring Costs Incurred (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended		21 Months Ended	24 Months Ended
	Oct. 03, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 03, 2015	Dec. 31, 2014
The Acquisition
Restructuring Cost and Reserve [Line Items]
Severance, stay bonuses, and other employee-related expenses	$ 27,703	$ 5,557		$ 33,260
Obligations for future lease payments	6,900	0		6,900
Professional services	249	16		265
Total	$ 34,852	5,573		$ 40,425
Organizational Design Changes
Restructuring Cost and Reserve [Line Items]
Severance, stay bonuses, and other employee-related expenses		5,991	$ 6,650		$ 12,641
Professional services		16	180		196
Relocation and transition costs		0	20		20
Total		$ 6,007	$ 6,850		$ 12,857