SEGMENT REPORTING, Technology Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Abstract]
Net sales	$ 587,611	$ 493,706	$ 1,161,786	$ 952,065
Less: Revenue from financing and other	(17,709)	(19,811)	(32,532)	(33,424)
Revenue from contracts with customers	569,902	473,895	1,129,254	918,641
Product [Member]
Disaggregation of Revenue [Abstract]
Net sales	516,609	428,545	1,023,265	823,795
Technology Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	571,939	471,478	1,137,624	920,263
Less: Revenue from financing and other	(4,872)	(4,506)	(12,495)	(9,490)
Revenue from contracts with customers	567,067	466,972	1,125,129	910,773
Technology Segment [Member] | Telecom, Media & Entertainment [Member]
Disaggregation of Revenue [Abstract]
Net sales	124,306	118,454	265,641	246,731
Technology Segment [Member] | Technology [Member]
Disaggregation of Revenue [Abstract]
Net sales	110,948	96,160	184,351	166,021
Technology Segment [Member] | State and Local Government and Educational Institutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	94,906	70,491	204,311	135,092
Technology Segment [Member] | Health Care [Member]
Disaggregation of Revenue [Abstract]
Net sales	72,022	66,959	158,678	135,471
Technology Segment [Member] | Financial Services [Member]
Disaggregation of Revenue [Abstract]
Net sales	69,885	37,611	135,575	70,910
Technology Segment [Member] | All Others [Member]
Disaggregation of Revenue [Abstract]
Net sales	99,872	81,803	189,068	166,038
Product Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	500,937	406,317	999,103	791,993
Less: Revenue from financing and other	(4,872)	(4,506)	(12,495)	(9,490)
Revenue from contracts with customers	496,065	401,811	986,608	782,503
Product Segment [Member] | Networking [Member]
Disaggregation of Revenue [Abstract]
Net sales	268,636	165,896	513,824	308,537
Product Segment [Member] | Cloud [Member]
Disaggregation of Revenue [Abstract]
Net sales	135,068	148,992	307,112	313,725
Product Segment [Member] | Security [Member]
Disaggregation of Revenue [Abstract]
Net sales	51,886	48,517	97,682	96,512
Product Segment [Member] | Collaboration [Member]
Disaggregation of Revenue [Abstract]
Net sales	27,083	19,187	40,039	32,167
Product Segment [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	18,264	23,725	40,446	41,052
Professional Services Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	38,270	38,050	73,826	75,218
Less: Revenue from financing and other	0	0	0	0
Revenue from contracts with customers	38,270	38,050	73,826	75,218
Managed Services Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	32,732	27,111	64,695	53,052
Less: Revenue from financing and other	0	0	0	0
Revenue from contracts with customers	$ 32,732	$ 27,111	$ 64,695	$ 53,052