CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Accumulated Other Comprehensive Income (loss) [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Paid-in Capital [Member]	Common Stock [Member]
Balance, Beginning at Dec. 28, 2013	$ 838,347	$ (8,635)	$ 730,352	$ (151,743)	$ 268,229	$ 144
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	193,312	0	193,312	0	0	0
Currency translation adjustments	(18,770)	(18,770)	0	0	0	0
Change in unrecognized pension benefit costs, net of tax of 2010: $105, 2011: $3,200, 2012: $(137)	(4,420)	(4,420)	0	0	0	0
Unrealized gain on interest rate swap, net of tax of 2010: $(342), 2011: $437, 2012: $(149)	394	394	0	0	0	0
Stock compensation	16,690	0	0	0	16,690	0
Tax benefit on stock compensation	25,490	0	0	0	25,490	0
Purchase of treasury stock	(44,283)	0	0	(44,283)	0	0
Balance, Ending at Jan. 03, 2015	1,006,760	(31,431)	923,664	(196,026)	310,409	144
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	191,610	0	191,610	0	0	0
Currency translation adjustments	(28,187)	(28,187)	0	0	0	0
Change in unrecognized pension benefit costs, net of tax of 2010: $105, 2011: $3,200, 2012: $(137)	(17,039)	(17,039)	0	0	0	0
Unrealized gain on interest rate swap, net of tax of 2010: $(342), 2011: $437, 2012: $(149)	245	245	0	0	0	0
Stock compensation	15,863	0	0	0	15,863	0
Tax benefit on stock compensation	2,414	0	0	0	2,414	0
Purchase of treasury stock	(4,836)	0	0	(4,836)	0	0
Balance, Ending at Jan. 02, 2016	1,166,830	(76,412)	1,115,274	(200,862)	328,686	144
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	284,216	0	284,216	0	0	0
Currency translation adjustments	(63,569)	(63,569)	0	0	0	0
Change in unrecognized pension benefit costs, net of tax of 2010: $105, 2011: $3,200, 2012: $(137)	(149,815)	(149,815)	0	0	0	0
Unrealized gain on interest rate swap, net of tax of 2010: $(342), 2011: $437, 2012: $(149)	5,473	5,473	0	0	0	0
Stock compensation	27,905	0	0	0	27,905	0
Tax benefit on stock compensation		0	0			0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(1,304)				(1,304)
Purchase of treasury stock	(4,418)	0	0	(4,418)	0	0
Balance, Ending at Dec. 31, 2016	$ 1,265,318	$ (284,323)	$ 1,399,490	$ (205,280)	$ 355,287	$ 144