CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Net sales
Total	$ 1,821,019	$ 1,568,323	$ 1,588,404
Cost of sales
Total	1,360,037	1,174,769	1,197,213
Gross profit	460,982	393,554	391,191
Selling, general, and administrative	297,117	271,263	279,182
Depreciation and amortization	14,646	13,951	14,156
Interest and financing costs	1,903	2,005	2,574
Operating expenses	313,666	287,219	295,912
Operating income	147,316	106,335	95,279
Other income (expense)	(432)	571	680
Earnings before tax	146,884	106,906	95,959
Provision for income taxes	41,284	32,509	26,877
Net earnings	$ 105,600	$ 74,397	$ 69,082
Net earnings per common share-basic (in dollars per share)	$ 3.96	$ 2.79	$ 2.59
Net earnings per common share-diluted (in dollars per share)	$ 3.93	$ 2.77	$ 2.57
Weighted average common shares outstanding-basic (in shares)	26,638	26,674	26,654
Weighted average common shares outstanding-diluted (in shares)	26,866	26,834	26,830
Product [Member]
Net sales
Total	$ 1,580,394	$ 1,366,158	$ 1,395,288
Cost of sales
Total	1,210,943	1,049,677	1,076,773
Services [Member]
Net sales
Total	240,625	202,165	193,116
Cost of sales
Total	$ 149,094	$ 125,092	$ 120,440