Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income Loss	Treasury Stock
Balances at Jan. 03, 2015	$ 1,123,044	$ 199	$ 613,859	$ 809,068	$ (98,020)	$ (202,062)
Balances (in shares) at Jan. 03, 2015		228,729,585
Balances, treasury shares at Jan. 03, 2015						(19,382,272)
Net income	189,191			189,191
Derivative instruments, net of tax	1,218				1,218
Pension and postretirement plans, net of tax	2				2
Shares issued for acquisition	12,602		7,493			$ 5,109
Shares issued for acquisition (in shares)						481,540
Stock repurchases	(6,858)					$ (6,858)
Stock repurchases (in shares)						(318,399)
Exercise of stock options	19,617		137			$ 19,480
Exercise of stock options (in shares)						1,838,083
Issuance of deferred stock awards			(591)			$ 591
Issuance of deferred stock awards (in shares)						55,713
Amortization of share-based compensation awards	15,574		15,574
Income tax benefits related to share-based payments	9,134		9,134
Performance-contingent restricted stock awards issued (Note 18)			(8,899)			$ 8,899
Performance-contingent restricted stock awards issued (in shares)						853,206
Issuance of deferred compensation			(206)			$ 206
Issuance of deferred compensation (in shares)						8,992
Dividends paid on vested performance-contingent restricted stock and deferred share awards	(879)			(879)
Dividends paid	(119,563)			(119,563)
Balances at Jan. 02, 2016	1,243,082	$ 199	636,501	877,817	(96,800)	$ (174,635)
Balances (in shares) at Jan. 02, 2016		228,729,585
Balances, treasury shares at Jan. 02, 2016						(16,463,137)
Net income	163,776			163,776
Derivative instruments, net of tax	9,129				9,129
Pension and postretirement plans, net of tax	4,388				4,388
Stock repurchases	(126,300)		(1,125)			$ (125,175)
Stock repurchases (in shares)						(6,892,322)
Exercise of stock options	27,631		(4,323)			$ 31,954
Exercise of stock options (in shares)						2,506,255
Issuance of deferred stock awards			(1,411)			$ 1,411
Issuance of deferred stock awards (in shares)						111,868
Amortization of share-based compensation awards	18,772		18,772
Income tax benefits related to share-based payments	675		675
Performance-contingent restricted stock awards issued (Note 18)			(4,519)			$ 4,519
Performance-contingent restricted stock awards issued (in shares)						424,787
Issuance of deferred compensation			(114)			$ 114
Issuance of deferred compensation (in shares)						5,765
Dividends paid on vested performance-contingent restricted stock and deferred share awards	(583)			(583)
Dividends paid	(130,490)			(130,490)
Balances at Dec. 31, 2016	$ 1,210,080	$ 199	644,456	910,520	(83,283)	$ (261,812)
Balances (in shares) at Dec. 31, 2016		228,729,585
Balances, treasury shares at Dec. 31, 2016	(20,306,784)					(20,306,784)
Net income	$ 150,120			150,120
Derivative instruments, net of tax	(5,422)				(5,422)
Pension and postretirement plans, net of tax	4,146				4,146
Stock repurchases	(2,671)					$ (2,671)
Stock repurchases (in shares)						(140,135)
Exercise of stock options	19,313		(3,610)			$ 22,923
Exercise of stock options (in shares)						1,773,336
Issuance of deferred stock awards			(1,789)			$ 1,789
Issuance of deferred stock awards (in shares)						138,354
Amortization of share-based compensation awards	16,093		16,093
Performance-contingent restricted stock awards issued (Note 18)			(4,240)			$ 4,240
Performance-contingent restricted stock awards issued (in shares)						328,947
Issuance of deferred compensation			(38)			$ 38
Issuance of deferred compensation (in shares)						2,901
Dividends paid on vested performance-contingent restricted stock and deferred share awards	(553)			(553)
Dividends paid	(140,429)			(140,429)
Balances at Dec. 30, 2017	$ 1,250,677	$ 199	$ 650,872	$ 919,658	$ (84,559)	$ (235,493)
Balances (in shares) at Dec. 30, 2017		228,729,585
Balances, treasury shares at Dec. 30, 2017	(18,203,381)					(18,203,381)