Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Total Shareholders' Equity [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 02, 2009	$ 684,831	$ 427,921	$ 27,649	$ 1,140,401	$ 3,655	$ 1,144,056
Balance, shares at Jan. 02, 2009	119,051
Components of comprehensive income:
Net income		63,446		63,446	517	63,963
Unrealized gain on investments			392	392		392
Foreign currency translation adjustments, net of tax			20,583	20,583		20,583
Unrecognized actuarial loss			(327)	(327)		(327)
Total comprehensive income				84,094	517	84,611
Issuance of common stock under employee plans, net	14,855			14,855		14,855
Issuance of common stock under employee plans, net, shares	1,399
Stock based compensation	18,862			18,862		18,862
Noncontrolling interest investments					471	471
Tax benefit from stock option exercises	1,700			1,700		1,700
Balance at Jan. 01, 2010	720,248	491,367	48,297	1,259,912	4,643	1,264,555
Balance, shares at Jan. 01, 2010	120,450
Components of comprehensive income:
Net income		103,660		103,660	(47)	103,613
Foreign currency translation adjustments, net of tax			354	354		354
Unrecognized actuarial loss			(624)	(624)		(624)
Total comprehensive income				103,390	(47)	103,343
Issuance of common stock under employee plans, net	45,182	(634)		44,548		44,548
Issuance of common stock under employee plans, net, shares	3,065
Stock repurchase	(15,808)	(58,043)		(73,851)		(73,851)
Stock repurchase, shares	(2,576)
Stock based compensation	23,403			23,403		23,403
Noncontrolling interest investments	429			429	14,947	15,376
Tax benefit from stock option exercises	8,325			8,325		8,325
Balance at Dec. 31, 2010	781,779	536,350	48,027	1,366,156	19,543	1,385,699
Balance, shares at Dec. 31, 2010	120,939					120,939
Components of comprehensive income:
Net income		150,755		150,755	(1,846)	148,909
Foreign currency translation adjustments, net of tax			(42,328)	(42,328)		(42,328)
Unrecognized actuarial loss			(559)	(559)		(559)
Total comprehensive income				107,868	(1,846)	106,022
Issuance of common stock under employee plans, net	47,335	(1,466)		45,869		45,869
Issuance of common stock under employee plans, net, shares	2,724
Stock based compensation	28,759			28,759		28,759
Noncontrolling interest investments					1,912	1,912
Tax benefit from stock option exercises	20,641			20,641		20,641
Balance at Dec. 30, 2011	$ 878,514	$ 685,639	$ 5,140	$ 1,569,293	$ 19,609	$ 1,588,902
Balance, shares at Dec. 30, 2011	123,663					123,663