Revenue Recognition Effect of Adopting ASC 606 (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2018		Jul. 01, 2017		Jun. 30, 2018	Jul. 01, 2017	Dec. 30, 2017
Effect of Adopting ASC 606 [Line Items]
Accounts Receivable, Net, Current	$ 400,266				$ 400,266		$ 328,421
Inventories, net	493,667				493,667		424,639
Prepaid expenses and other	48,890				48,890		55,427
Long-term deferred tax assets	40,807				40,807		44,565
Accounts payable	188,256				188,256		146,333
Accrued expenses	361,501				361,501		322,171
Deferred Tax Liabilities, Net, Noncurrent	102,636				102,636		87,815
Retained earnings	1,841,489				1,841,489		1,697,618
Net sales	668,128	[1]	$ 579,343	[1]	1,252,928	$ 1,109,640
Cost of sales	417,369		344,735		790,536	665,582
Provision for income taxes	26,576		38,563		47,857	61,268
Net earnings	$ 83,988		$ 77,569		$ 149,408	$ 148,271
Earnings Per Share, Basic	$ 1.51		$ 1.35		$ 2.69	$ 2.59
Earnings Per Share, Diluted	$ 1.51		$ 1.35		$ 2.69	$ 2.59
Accounting Standards Update 2014-09 [Member]
Effect of Adopting ASC 606 [Line Items]
Accounts Receivable, Net, Current							(122)
Inventories, net							14,993
Prepaid expenses and other							(4,018)
Long-term deferred tax assets							1,319
Accrued expenses							16,557
Retained earnings							(4,405)
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Effect of Adopting ASC 606 [Line Items]
Inventories, net	$ 487,910				$ 487,910
Prepaid expenses and other	51,927				51,927
Accrued expenses	365,744				365,744
Deferred Tax Liabilities, Net, Noncurrent	102,246				102,246
Retained earnings	1,840,356				1,840,356
Net sales	667,697				1,238,355
Cost of sales	417,452				780,138
Provision for income taxes	26,482				46,792
Net earnings	$ 83,567				$ 146,298
Earnings Per Share, Basic	$ 1.50				$ 2.63
Earnings Per Share, Diluted	$ 1.50				$ 2.63
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Effect of Adopting ASC 606 [Line Items]
Inventories, net	$ 5,757				$ 5,757
Prepaid expenses and other	(3,037)				(3,037)
Accrued expenses	(4,243)				(4,243)
Deferred Tax Liabilities, Net, Noncurrent	390				390
Retained earnings	1,133				1,133
Net sales	431				14,573
Cost of sales	(83)				10,398
Provision for income taxes	94				1,065
Net earnings	$ 421				$ 3,110
BalanceUponAdoption [Member] | Accounting Standards Update 2014-09 [Member]
Effect of Adopting ASC 606 [Line Items]
Accounts Receivable, Net, Current							328,299
Inventories, net							439,632
Prepaid expenses and other							51,409
Long-term deferred tax assets							45,884
Accrued expenses							338,728
Retained earnings							$ 1,693,213

[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.