Segment Information - Revenue and Long-Lived Assets by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 186,306	$ 173,559	$ 165,399	$ 142,815	$ 139,092	$ 142,020	$ 138,385	$ 124,625	$ 668,079	$ 544,122	$ 438,437
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									476,172	345,734	296,849
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									34,379	10,377	11,811
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									510,551	356,111	308,660
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									132,271	150,912	116,663
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									$ 25,257	$ 37,099	$ 13,114