SEGMENT REPORTING - Technology Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 510,965	$ 509,055	$ 1,570,675	$ 1,670,841
Less: Revenue from financing and other	27,519	21,537	68,056	54,069
Revenue from contracts with customers	483,446	487,518	1,502,619	1,616,772
Technology Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	493,119	494,162	1,521,900	1,631,786
Less: Revenue from financing and other	(13,107)	(7,418)	(24,472)	(19,913)
Revenue from contracts with customers	480,012	486,744	1,497,428	1,611,873
Technology Segment [Member] \| Telecom, Media & Entertainment [Member]
Disaggregation of Revenue [Line Items]
Net sales	126,201	139,551	352,624	405,192
Technology Segment [Member] \| State and Local Government and Educational Institutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	71,412	60,108	261,195	264,419
Technology Segment [Member] \| Technology [Member]
Disaggregation of Revenue [Line Items]
Net sales	71,293	83,951	235,387	268,302
Technology Segment [Member] \| Healthcare [Member]
Disaggregation of Revenue [Line Items]
Net sales	58,670	55,504	212,185	214,182
Technology Segment [Member] \| Financial Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,217	38,816	130,701	174,391
Technology Segment [Member] \| All Others [Member]
Disaggregation of Revenue [Line Items]
Net sales	119,326	116,232	329,808	305,300
Product Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	379,472	419,478	1,226,397	1,418,581
Less: Revenue from financing and other	13,107	7,418	24,472	19,913
Revenue from contracts with customers	366,365	412,060	1,201,925	1,398,668
Product Segment [Member] \| Networking [Member]
Disaggregation of Revenue [Line Items]
Net sales	181,367	209,936	602,883	723,760
Product Segment [Member] \| Cloud [Member]
Disaggregation of Revenue [Line Items]
Net sales	116,864	120,253	375,431	427,365
Product Segment [Member] \| Security [Member]
Disaggregation of Revenue [Line Items]
Net sales	53,919	58,822	143,133	156,504
Product Segment [Member] \| Collaboration [Member]
Disaggregation of Revenue [Line Items]
Net sales	8,391	13,608	47,278	53,647
Product Segment [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	18,931	16,859	57,672	57,305
Professional Services Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	69,497	40,044	168,676	113,870
Less: Revenue from financing and other	0	0	0	0
Revenue from contracts with customers	69,497	40,044	168,676	113,870
Managed Services Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	44,150	34,640	126,827	99,335
Less: Revenue from financing and other	0	0	0	0
Revenue from contracts with customers	$ 44,150	$ 34,640	$ 126,827	$ 99,335