Revenue Recognition Effect of Adopting ASC 606 (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 29, 2018		Sep. 29, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 30, 2017		Sep. 30, 2017		Jul. 01, 2017		Apr. 01, 2017		Dec. 29, 2018		Dec. 30, 2017		Dec. 31, 2016
Effect of Adopting ASC 606 [Line Items]
Inventory, Net	$ 521,810								$ 424,639								$ 521,810		$ 424,639
Net sales	756,672		$ 713,331		$ 668,128		$ 584,800		632,859		$ 593,043		$ 579,343		$ 530,297		2,722,931		2,335,542		$ 2,267,852
Cost of Sales																	1,718,791		1,422,801		1,366,672
Provision for income taxes																	106,361		85,401		137,089
Net earnings	$ 94,839		$ 72,905		$ 83,988		$ 65,420		$ 75,186		$ 74,671		$ 77,569		$ 70,702		$ 317,152		$ 298,128		$ 284,216
Basic earnings per share (usd per share)	$ 1.71	[1]	$ 1.31	[1]	$ 1.51	[1]	$ 1.18	[1]	$ 1.35	[1]	$ 1.31	[1]	$ 1.35	[1]	$ 1.24	[1]	$ 5.71		$ 5.26	[1]	$ 4.98
Diluted earnings per share (usd per share)	$ 1.70	[1]	$ 1.31	[1]	$ 1.51	[1]	$ 1.18	[1]	$ 1.35	[1]	$ 1.31	[1]	$ 1.35	[1]	$ 1.24	[1]	$ 5.70	[1]	$ 5.26	[1]	$ 4.98
Prepaid expenses and other	$ 50,940								$ 55,427								$ 50,940		$ 55,427
Deferred Income Tax Assets, Net	32,188								44,565								32,188		44,565
Accounts payable	188,299								146,333								188,299		146,333
Accrued expenses	367,446								322,171								367,446		322,171
Long-term deferred tax liability	113,896								87,815								113,896		87,815
Retained earnings	2,009,233								$ 1,697,618								2,009,233		$ 1,697,618
Calculated under Revenue Guidance in Effect before Topic 606
Effect of Adopting ASC 606 [Line Items]
Inventory, Net	520,631																520,631
Net sales																	2,702,357
Cost of Sales																	1,703,488
Provision for income taxes																	105,132
Net earnings																	$ 313,110
Basic earnings per share (usd per share)																	$ 5.63
Diluted earnings per share (usd per share)																	$ 5.63
Prepaid expenses and other	51,315																$ 51,315
Accrued expenses	368,128																368,128
Long-term deferred tax liability	113,841																113,841
Retained earnings	2,009,411																2,009,411
Difference between Revenue Guidance in Effect before and after Topic 606
Effect of Adopting ASC 606 [Line Items]
Inventory, Net	1,179																1,179
Net sales																	20,574
Cost of Sales																	15,303
Provision for income taxes																	1,229
Net earnings																	4,042
Prepaid expenses and other	(375)																(375)
Accrued expenses	(682)																(682)
Long-term deferred tax liability	55																55
Retained earnings	$ (178)																$ (178)

[1] Sum of quarters may not equal the total for the year due to changes in the number of shares outstanding during the year.