CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Revenue from Contract with Customer, Excluding Assessed Tax		$ 634,525	$ 724,014	$ 1,783,961	$ 2,171,820
Cost of sales		411,776	453,986	1,157,896	1,358,001
Gross profit		222,749	270,028	626,065	813,819
Selling, General and Administrative Expense		128,814	144,460	384,580	445,000
Restructuring Charges		7,263	4,223	10,281	6,806
Income from operations	[1],[2]	86,672	121,345	231,204	362,013
Net interest expense and deferred financing amortization, net		18,418	20,846	55,881	63,334
Net periodic pension benefit (other than service costs)		(10,149)	(7,175)	(30,004)	(22,233)
Other (income) expense, net		(294)	1,444	3,414	(489)
Earnings before income taxes		78,697	106,230	201,913	321,401
Provision for income taxes		18,181	24,210	46,456	78,158
Net earnings		$ 60,516	$ 82,020	$ 155,457	$ 243,243
Net earnings per share:
Earnings Per Share, Basic		$ 1.10	$ 1.47	$ 2.82	$ 4.37
Earnings Per Share, Diluted		$ 1.10	$ 1.47	$ 2.82	$ 4.37
Weighted average number of shares
Basic (in shares)		54,982,000	55,663,000	55,104,000	55,641,000
Dilutive common stock equivalents (in shares)		118,000	0	48,000	0
Diluted (in shares)		55,100,000	55,663,000	55,152,000	55,641,000
Comprehensive income		$ 82,887	$ 55,915	$ 133,201	$ 191,876

[1] Non-operating expenses are not allocated to the operating segments. Non-operating expenses consist of interest expense and deferred financing amortization, foreign exchange gains and losses and other income and expense items outside of income from operations.

[2] Restructuring expenses are allocated in operating income by segment. See note 16 for further details.