Changes in Accumulated Other Comprehensive Income Balances (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2016	Apr. 05, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (8,144)	$ 4,689
Other comprehensive income (loss) before reclassifications, net of tax	13,342	1,799
Amounts reclassified from accumulated other comprehensive income, net of tax	(163)	(404)
Other comprehensive income	13,179	1,395
Ending balance	5,035	6,084
Foreign currency translation reclassification adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(8,759)
Other comprehensive income (loss) before reclassifications, net of tax	10,271
Other comprehensive income	10,271
Ending balance	1,512
Unrealized Gains (Losses) on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,414)	2,365
Other comprehensive income (loss) before reclassifications, net of tax	3,071	1,799
Amounts reclassified from accumulated other comprehensive income, net of tax	(83)	(330)
Other comprehensive income	2,988	1,469
Ending balance	1,574	3,834
Retirement Plans Prior Service Credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	2,029	2,324
Amounts reclassified from accumulated other comprehensive income, net of tax	(80)	(74)
Other comprehensive income	(80)	(74)
Ending balance	$ 1,949	$ 2,250