SEGMENT REPORTING, Technology Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Abstract]
Net sales	$ 494,834	$ 427,604	$ 1,369,500	$ 1,215,716
Less: Revenue from financing and other	(15,231)	(14,525)	(55,823)	(54,305)
Revenue from contracts with customers	479,603	413,079	1,313,677	1,161,411
Technology Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	476,975	415,570	1,313,634	1,176,153
Less: Revenue from financing and other	(3,212)	(4,395)	(12,991)	(18,634)
Revenue from contracts with customers	473,763	411,175	1,300,643	1,157,519
Technology Segment [Member] | Telecom, Media & Entertainment [Member]
Disaggregation of Revenue [Abstract]
Net sales	152,584	123,441	380,560	277,020
Technology Segment [Member] | Technology [Member]
Disaggregation of Revenue [Abstract]
Net sales	67,959	57,346	190,851	203,634
Technology Segment [Member] | State and Local Government and Educational Institutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	59,449	50,703	193,526	197,758
Technology Segment [Member] | Health Care [Member]
Disaggregation of Revenue [Abstract]
Net sales	64,775	44,706	207,700	150,494
Technology Segment [Member] | Financial Services [Member]
Disaggregation of Revenue [Abstract]
Net sales	39,182	60,610	106,229	154,763
Technology Segment [Member] | All Others [Member]
Disaggregation of Revenue [Abstract]
Net sales	93,026	78,764	234,768	192,484
Technology Segment [Member] | Cisco Systems [Member]
Disaggregation of Revenue [Abstract]
Net sales	183,195	132,290	524,169	433,388
Technology Segment [Member] | Dell / EMC [Member]
Disaggregation of Revenue [Abstract]
Net sales	40,254	34,027	110,092	80,457
Technology Segment [Member] | Juniper Networks [Member]
Disaggregation of Revenue [Abstract]
Net sales	28,792	29,781	71,944	68,076
Technology Segment [Member] | HP Inc. & HPE [Member]
Disaggregation of Revenue [Abstract]
Net sales	12,568	14,100	43,808	47,533
Technology Segment [Member] | Arista Networks [Member]
Disaggregation of Revenue [Abstract]
Net sales	13,484	22,157	33,029	42,420
Technology Segment [Member] | NetApp [Member]
Disaggregation of Revenue [Abstract]
Net sales	30,261	13,861	70,254	39,196
Technology Segment [Member] | All Others [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 168,421	$ 169,354	$ 460,338	$ 465,083