Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net sales:
Total net sales	$ 10,431,191	$ 9,436,113	$ 8,340,579
Costs of goods sold:
Total costs of goods sold	8,794,624	7,988,556	7,040,637
Gross profit	1,636,567	1,447,557	1,299,942
Operating expenses:
Selling and administrative expenses	1,216,660	1,117,130	1,013,765
Severance and restructuring expenses, net	4,235	(1,634)	12,394
Acquisition and integration related expenses	1,972	0	2,208
Earnings from operations	413,700	332,061	271,575
Non-operating (income) expense:
Interest expense, net	39,497	40,516	41,594
Other (income) expense, net	(230)	(1,012)	1,529
Earnings before income taxes	374,433	292,557	228,452
Income tax expense	93,825	73,212	55,812
Net earnings	$ 280,608	$ 219,345	$ 172,640
Net earnings per share:
Basic (in dollars per share)	$ 8.04	$ 6.27	$ 4.92
Diluted (in dollars per share)	$ 7.66	$ 5.95	$ 4.87
Shares used in per share calculations:
Basic (in shares)	34,903	35,011	35,117
Diluted (in shares)	36,620	36,863	35,444
Products
Net sales:
Total net sales	$ 8,947,787	$ 8,120,127	$ 7,172,155
Costs of goods sold:
Total costs of goods sold	8,111,252	7,380,908	6,497,001
Gross profit	836,535	739,219	675,154
Services
Net sales:
Total net sales	1,483,404	1,315,986	1,168,424
Costs of goods sold:
Total costs of goods sold	683,372	607,648	543,636
Gross profit	$ 800,032	$ 708,338	$ 624,788