CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(loss) [Member]
Balance, Beginning at Dec. 29, 2012	$ 650,027	$ 141	$ 233,213	$ (147,352)	$ 576,424	$ (12,399)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	153,928	0	0	0	153,928	0
Currency translation adjustments	(530)	0	0	0	0	(530)
Change in unrecognized pension benefit costs, net of tax of 2010: $105, 2011: $3,200, 2012: $(137)	3,477	0	0	0	0	3,477
Unrealized gain on interest rate swap, net of tax of 2010: $(342), 2011: $437, 2012: $(149)	817	0	0	0	0	817
Exercise of stock options	3,842	3	3,839	0	0	0
Stock compensation	11,862	0	11,862	0	0	0
Tax benefit on stock compensation	19,315	0	19,315	0	0	0
Purchase of treasury stock	(4,391)	0	0	(4,391)	0	0
Balance, Ending at Dec. 28, 2013	838,347	144	268,229	(151,743)	730,352	(8,635)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	193,312	0	0	0	193,312	0
Currency translation adjustments	(18,770)	0	0	0	0	(18,770)
Change in unrecognized pension benefit costs, net of tax of 2010: $105, 2011: $3,200, 2012: $(137)	(4,420)	0	0	0	0	(4,420)
Unrealized gain on interest rate swap, net of tax of 2010: $(342), 2011: $437, 2012: $(149)	394	0	0	0	0	394
Stock compensation	16,690	0	16,690	0	0	0
Tax benefit on stock compensation	25,490	0	25,490	0	0	0
Purchase of treasury stock	(44,283)	0	0	(44,283)	0	0
Balance, Ending at Jan. 03, 2015	1,006,760	144	310,409	(196,026)	923,664	(31,431)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	191,610	0	0	0	191,610	0
Currency translation adjustments	(28,187)	0	0	0	0	(28,187)
Change in unrecognized pension benefit costs, net of tax of 2010: $105, 2011: $3,200, 2012: $(137)	(17,039)	0	0	0	0	(17,039)
Unrealized gain on interest rate swap, net of tax of 2010: $(342), 2011: $437, 2012: $(149)	245	0	0	0	0	245
Stock compensation	15,863	0	15,863	0	0	0
Tax benefit on stock compensation	2,414	0	2,414	0	0	0
Purchase of treasury stock	(4,836)	0	0	(4,836)	0	0
Balance, Ending at Jan. 02, 2016	$ 1,166,830	$ 144	$ 328,686	$ (200,862)	$ 1,115,274	$ (76,412)