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	$ 59,363
Derivative instruments, net of tax	3,731
Pension and postretirement plans, net of tax	1,053
Balances at Apr. 23, 2016					(92,016)
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	$ 60,418			60,418
Derivative instruments, net of tax	(3,044)				(3,044)
Pension and postretirement plans, net of tax	1,143				1,143
Exercise of stock options (in shares)						571,568
Exercise of stock options	6,249		(1,123)			$ 7,372
Amortization of share-based compensation awards	5,975		5,975
Issuance of deferred compensation (in shares)						2,675
Issuance of deferred compensation			(35)			$ 35
Performance-contingent restricted stock awards issued (in shares)						328,947
Performance-contingent restricted stock awards issued (Note 13)			(4,240)			$ 4,240
Issuance of deferred stock awards (in shares)						17,448
Issuance of deferred stock awards			(225)			$ 225
Stock repurchases (in shares)						(112,085)
Stock repurchases	(2,151)					$ (2,151)
Dividends paid on vested share-based payment awards	(424)			(424)
Dividends paid — $.1600 per common share	(33,461)			(33,461)
Balances at Apr. 22, 2017	$ 1,244,785	$ 199	$ 644,808	$ 937,053	$ (85,184)	$ (252,091)
Balances (in shares) at Apr. 22, 2017		228,729,585
Balances, treasury shares at Apr. 22, 2017	(19,498,231)					(19,498,231)