Condensed Consolidated Statements Of Equity Condensed Consolidatd Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock, Common	Additional Paid-in Capital	Retained Earnings	Foreign currency translation adjustments	Defined benefit pension adjustments
Balance (in shares) at Dec. 31, 2019		134,930	(202)
Balance at Dec. 31, 2019	$ 1,165,889	$ 1,349	$ (7,112)	$ 842,784	$ 366,127	$ (36,468)	$ (791)
Shares issued under stock plans (in shares)		483
Shares issued under stock plans	(10,889)	$ 5	0	(10,894)	0	0	0
Share-based compensation expense	4,994	$ 0	0	4,994	0	0	0
Repurchase and retirements of common stock (in shares)		(604)
Repurchase and retirements of common stock	(29,564)	$ (6)	0	(3,740)	(25,818)	0	0
Dividends declared	(10,758)	0	0	15	(10,773)	0	0
Pension liability adjustments	10	0	0	0	0	0	10
Foreign currency translation adjustments	(9,361)	0	0	0	0	(9,361)	0
Net income	61,006	$ 0	$ 0	0	61,006	0	0
Balance (in shares) at Mar. 28, 2020		134,809	(202)
Balance at Mar. 28, 2020	1,171,327	$ 1,348	$ (7,112)	833,159	390,542	(45,829)	(781)
Balance (in shares) at Dec. 31, 2019		134,930	(202)
Balance at Dec. 31, 2019	1,165,889	$ 1,349	$ (7,112)	842,784	366,127	(36,468)	(791)
Pension liability adjustments	19
Foreign currency translation adjustments	(11,537)
Net income	129,042
Balance (in shares) at Jun. 27, 2020		134,948	(202)
Balance at Jun. 27, 2020	1,231,789	$ 1,349	$ (7,112)	838,739	447,590	(48,005)	(772)
Balance (in shares) at Mar. 28, 2020		134,809	(202)
Balance at Mar. 28, 2020	1,171,327	$ 1,348	$ (7,112)	833,159	390,542	(45,829)	(781)
Shares issued under stock plans (in shares)		139
Shares issued under stock plans	(82)	$ 1	0	(83)	0	0	0
Share-based compensation expense	5,655	0	0	5,655	0	0	0
Dividends declared	(10,980)	0	0	8	(10,988)	0	0
Pension liability adjustments	9	0	0	0	0	0	9
Foreign currency translation adjustments	(2,176)	0	0	0	0	(2,176)	0
Net income	68,036	$ 0	$ 0	0	68,036	0	0
Balance (in shares) at Jun. 27, 2020		134,948	(202)
Balance at Jun. 27, 2020	1,231,789	$ 1,349	$ (7,112)	838,739	447,590	(48,005)	(772)
Balance (in shares) at Dec. 31, 2020		135,149	(202)
Balance at Dec. 31, 2020	1,379,494	$ 1,351	$ (7,112)	844,850	577,833	(36,588)	(840)
Shares issued under stock plans (in shares)		392
Shares issued under stock plans	(13,466)	$ 4	0	(13,470)	0	0	0
Share-based compensation expense	7,138	$ 0	0	7,138	0	0	0
Repurchase and retirements of common stock (in shares)		(145)
Repurchase and retirements of common stock	(15,000)	$ (1)	0	(904)	(14,095)	0	0
Dividends declared	(10,832)	0	0	8	(10,840)	0	0
Pension liability adjustments	39	0	0	0	0	0	39
Foreign currency translation adjustments	(3,716)	0	0	0	0	(3,716)	0
Net income	84,676	$ 0	$ 0	0	84,676	0	0
Balance (in shares) at Apr. 03, 2021		135,396	(202)
Balance at Apr. 03, 2021	1,428,333	$ 1,354	$ (7,112)	837,622	637,574	(40,304)	(801)
Balance (in shares) at Dec. 31, 2020		135,149	(202)
Balance at Dec. 31, 2020	1,379,494	$ 1,351	$ (7,112)	844,850	577,833	(36,588)	(840)
Pension liability adjustments	39
Foreign currency translation adjustments	(2,259)
Net income	173,446
Balance (in shares) at Jul. 03, 2021		135,825	(202)
Balance at Jul. 03, 2021	1,515,331	$ 1,358	$ (7,112)	859,520	701,213	(38,847)	(801)
Balance (in shares) at Apr. 03, 2021		135,396	(202)
Balance at Apr. 03, 2021	1,428,333	$ 1,354	$ (7,112)	837,622	637,574	(40,304)	(801)
Shares issued under stock plans (in shares)		559
Shares issued under stock plans	15,190	$ 5	0	15,185	0	0	0
Share-based compensation expense	7,519	$ 0	0	7,519	0	0	0
Repurchase and retirements of common stock (in shares)		(130)
Repurchase and retirements of common stock	(15,000)	$ (1)	0	(813)	(14,186)	0	0
Dividends declared	(10,938)	0	0	7	(10,945)	0	0
Pension liability adjustments	0	0	0	0	0	0	0
Foreign currency translation adjustments	1,457	0	0	0	0	1,457	0
Net income	88,770	$ 0	$ 0	0	88,770	0	0
Balance (in shares) at Jul. 03, 2021		135,825	(202)
Balance at Jul. 03, 2021	$ 1,515,331	$ 1,358	$ (7,112)	$ 859,520	$ 701,213	$ (38,847)	$ (801)