Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net sales:
Total net sales	$ 2,144,051	$ 1,685,466
Costs of goods sold:
Total costs of goods sold	1,818,715	1,436,994
Gross profit	325,336	248,472
Operating expenses:
Selling and administrative expenses	268,863	191,063
Severance and restructuring expenses, net	2,144	370
Acquisition and integration related expenses	1,466
Earnings from operations	52,863	57,039
Non-operating (income) expense:
Interest expense, net	11,826	4,552
Other (income) expense, net	(1,563)	1,050
Earnings before income taxes	42,600	51,437
Income tax expense	8,639	12,110
Net earnings	$ 33,961	$ 39,327
Net earnings per share:
Basic	$ 0.96	$ 1.10
Diluted	$ 0.95	$ 1.09
Shares used in per share calculations:
Basic	35,233	35,609
Diluted	35,646	36,103
Products [Member]
Net sales:
Total net sales	$ 1,848,316	$ 1,466,672
Costs of goods sold:
Total costs of goods sold	1,670,238	1,337,308
Services [Member]
Net sales:
Total net sales	295,735	218,794
Costs of goods sold:
Total costs of goods sold	$ 148,477	$ 99,686