Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balances at Jan. 02, 2016					$ (96,800)
Net income	$ 150,734
Derivative instruments, net of tax	5,184
Pension and postretirement plans, net of tax	(31,122)
Balances at Oct. 08, 2016					(122,738)
Balances at Jan. 02, 2016					(96,800)
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	$ 71,587			71,587
Derivative instruments, net of tax	(4,766)				(4,766)
Pension and postretirement plans, net of tax	1,947				1,947
Exercise of stock options	9,296		(1,702)			$ 10,998
Exercise of stock options (in shares)						851,801
Amortization of share-based compensation awards	11,708		11,708
Issuance of deferred compensation			(37)			$ 37
Issuance of deferred compensation (in shares)						2,788
Performance-contingent restricted stock awards issued (Note 13)			(4,240)			$ 4,240
Performance-contingent restricted stock awards issued (in shares)						328,947
Issuance of deferred stock awards			(1,789)			$ 1,789
Issuance of deferred stock awards (in shares)						138,354
Stock repurchases	(2,671)					$ (2,671)
Stock repurchases (in shares)						(140,135)
Dividends paid on vested share-based payment awards	(553)			(553)
Dividends paid — $.5000 per common share	(104,654)			(104,654)
Balances at Oct. 07, 2017	$ 1,191,974	$ 199	$ 648,396	$ 876,900	$ (86,102)	$ (247,419)
Balances (in shares) at Oct. 07, 2017		228,729,585
Balances, treasury shares at Oct. 07, 2017	(19,125,029)					(19,125,029)