SEGMENT REPORTING, Reportable Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) Segment	Dec. 31, 2022 USD ($)
SEGMENT REPORTING [Abstract]
Number of business segments | Segment			4
Reportable Segment Information [Abstract]
Net sales	$ 509,055	$ 623,476	$ 1,670,841	$ 1,575,541
Gross profit	133,810	138,372	420,448	385,199
Operating expenses	95,763	91,914	291,206	261,451
Operating income	38,047	46,458	129,242	123,748
Other income (expense), net	366	2,907	673	(3,112)
Earnings before tax	38,413	49,365	129,915	120,636
Depreciation and amortization	5,399	3,609	15,821	10,387
Interest and financing costs	983	1,575	3,054	2,863
Selected Financial Data - Statement of Cash Flow [Abstract]
Purchases of property, equipment and operating lease equipment	2,096	3,251	7,704	5,661
Technology Segment [Member]
Reportable Segment Information [Abstract]
Net sales	494,162	611,774	1,631,786	1,532,037
Product Segment [Member]
Reportable Segment Information [Abstract]
Net sales	419,478	544,316	1,418,581	1,336,309
Professional Services Segment [Member]
Reportable Segment Information [Abstract]
Net sales	40,044	39,151	113,870	114,369
Managed Services Segment [Member]
Reportable Segment Information [Abstract]
Net sales	34,640	28,307	99,335	81,359
Financing Segment [Member]
Reportable Segment Information [Abstract]
Net sales	14,893	11,702	39,055	43,504
Operating Segments [Member] | Technology Segment [Member]
Reportable Segment Information [Abstract]
Operating expenses	91,599	86,764	278,869	247,568
Operating income	28,667	41,090	108,048	102,212
Depreciation and amortization	5,381	3,582	15,747	10,304
Interest and financing costs	217	1,308	1,428	2,117
Selected Financial Data - Statement of Cash Flow [Abstract]
Purchases of property, equipment and operating lease equipment	2,028	2,225	6,717	4,122
Operating Segments [Member] | Product Segment [Member]
Reportable Segment Information [Abstract]
Net sales	419,478	544,316	1,418,581	1,336,309
Gross profit	91,919	104,485	308,059	282,042
Operating Segments [Member] | Professional Services Segment [Member]
Reportable Segment Information [Abstract]
Net sales	40,044	39,151	113,870	114,369
Gross profit	17,332	15,294	47,852	45,046
Operating Segments [Member] | Managed Services Segment [Member]
Reportable Segment Information [Abstract]
Net sales	34,640	28,307	99,335	81,359
Gross profit	11,015	8,075	31,006	22,692
Operating Segments [Member] | Financing Segment [Member]
Reportable Segment Information [Abstract]
Net sales	14,893	11,702	39,055	43,504
Gross profit	13,544	10,518	33,531	35,419
Operating expenses	4,164	5,150	12,337	13,883
Operating income	9,380	5,368	21,194	21,536
Depreciation and amortization	18	27	74	83
Interest and financing costs	766	267	1,626	746
Selected Financial Data - Statement of Cash Flow [Abstract]
Purchases of property, equipment and operating lease equipment	$ 68	$ 1,026	$ 987	$ 1,539