SEGMENT REPORTING, Technology Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Abstract]
Net sales	$ 509,055	$ 623,476	$ 1,670,841	$ 1,575,541
Less: Revenue from financing and other	(21,537)	(17,058)	(54,069)	(50,481)
Revenue from contracts with customers	487,518	606,418	1,616,772	1,525,060
Product [Member]
Disaggregation of Revenue [Abstract]
Net sales	434,371	556,018	1,457,636	1,379,813
Technology Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	494,162	611,774	1,631,786	1,532,037
Less: Revenue from financing and other	(7,418)	(5,916)	(19,913)	(15,405)
Revenue from contracts with customers	486,744	605,858	1,611,873	1,516,632
Technology Segment [Member] | Telecom, Media & Entertainment [Member]
Disaggregation of Revenue [Abstract]
Net sales	139,551	184,539	405,192	431,269
Technology Segment [Member] | Technology [Member]
Disaggregation of Revenue [Abstract]
Net sales	83,951	133,067	268,302	299,088
Technology Segment [Member] | State and Local Government and Educational Institutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	60,108	72,730	264,419	207,823
Technology Segment [Member] | Health Care [Member]
Disaggregation of Revenue [Abstract]
Net sales	55,504	69,825	214,182	205,297
Technology Segment [Member] | Financial Services [Member]
Disaggregation of Revenue [Abstract]
Net sales	38,816	48,008	174,391	118,917
Technology Segment [Member] | All Others [Member]
Disaggregation of Revenue [Abstract]
Net sales	116,232	103,605	305,300	269,643
Product Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	419,478	544,316	1,418,581	1,336,309
Less: Revenue from financing and other	(7,418)	(5,916)	(19,913)	(15,405)
Revenue from contracts with customers	412,060	538,400	1,398,668	1,320,904
Product Segment [Member] | Networking [Member]
Disaggregation of Revenue [Abstract]
Net sales	209,936	275,774	723,760	584,311
Product Segment [Member] | Cloud [Member]
Disaggregation of Revenue [Abstract]
Net sales	120,253	157,126	427,365	470,851
Product Segment [Member] | Security [Member]
Disaggregation of Revenue [Abstract]
Net sales	58,822	77,111	156,504	173,623
Product Segment [Member] | Collaboration [Member]
Disaggregation of Revenue [Abstract]
Net sales	13,608	13,405	53,647	45,572
Product Segment [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	16,859	20,900	57,305	61,952
Professional Services Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	40,044	39,151	113,870	114,369
Less: Revenue from financing and other	0	0	0	0
Revenue from contracts with customers	40,044	39,151	113,870	114,369
Managed Services Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	34,640	28,307	99,335	81,359
Less: Revenue from financing and other	0	0	0	0
Revenue from contracts with customers	$ 34,640	$ 28,307	$ 99,335	$ 81,359