Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total accumulated other comprehensive loss	$ (4,618)	$ (3,486)	$ (2,228)
Other comprehensive loss before reclassifications	5,741	(1,132)	(1,092)
Amounts reclassified from accumulated other comprehensive loss	0	0	(166)
Net change in accumulated other comprehensive income (loss)	5,741	(1,132)	(1,258)
Total accumulated other comprehensive loss	1,123	(4,618)	(3,486)
Unrealized Gain (Loss) on Auction Rate Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total accumulated other comprehensive loss	0	0	166
Other comprehensive loss before reclassifications	0	0	0
Amounts reclassified from accumulated other comprehensive loss	0	0	(166)
Net change in accumulated other comprehensive income (loss)	0	0	(166)
Total accumulated other comprehensive loss	0	0	0
Unrealized Gain (Loss) on Other Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total accumulated other comprehensive loss	(444)	(124)	16
Other comprehensive loss before reclassifications	(62)	(320)	(140)
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Net change in accumulated other comprehensive income (loss)	(62)	(320)	(140)
Total accumulated other comprehensive loss	(506)	(444)	(124)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total accumulated other comprehensive loss	(3,414)	(2,602)	(1,650)
Other comprehensive loss before reclassifications	5,803	(812)	(952)
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Net change in accumulated other comprehensive income (loss)	5,803	(812)	(952)
Total accumulated other comprehensive loss	2,389	(3,414)	(2,602)
Accumulated Tax Effect [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total accumulated other comprehensive loss	(760)	(760)	(760)
Other comprehensive loss before reclassifications	0	0	0
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Net change in accumulated other comprehensive income (loss)	0	0	0
Total accumulated other comprehensive loss	$ (760)	$ (760)	$ (760)