Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net sales:
Total net sales	$ 2,650,850	$ 2,193,068
Costs of goods sold:
Total costs of goods sold	2,271,989	1,861,594
Gross profit	378,861	331,474
Operating expenses:
Selling and administrative expenses	297,640	271,190
Severance and restructuring expenses, net	1,372	(6,740)
Earnings from operations	79,849	67,024
Non-operating (income) expense:
Interest expense, net	8,068	9,969
Other (income) expense, net	(2,843)	388
Earnings before income taxes	74,624	56,667
Income tax expense	17,993	13,499
Net earnings	$ 56,631	$ 43,168
Net earnings per share:
Basic (in usd per share)	$ 1.62	$ 1.23
Diluted (in usd per share)	$ 1.53	$ 1.18
Shares used in per share calculations:
Basic (in shares)	34,974	35,199
Diluted (in shares)	36,981	36,699
Products
Net sales:
Total net sales	$ 2,310,287	$ 1,893,020
Costs of goods sold:
Total costs of goods sold	2,107,209	1,721,258
Services
Net sales:
Total net sales	340,563	300,048
Costs of goods sold:
Total costs of goods sold	$ 164,780	$ 140,336