SEGMENT REPORTING, Technology Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Abstract]
Net sales	$ 355,031	$ 381,372
Less: Revenue from financing and other	(20,084)	(16,902)
Revenue from contracts with customers	334,947	364,470
Technology Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	341,224	368,535
Less: Revenue from financing and other	(7,237)	(4,854)
Revenue from contracts with customers	333,987	363,681
Technology Segment [Member] | Technology [Member]
Disaggregation of Revenue [Abstract]
Net sales	69,967	76,180
Technology Segment [Member] | Telecom, Media & Entertainment [Member]
Disaggregation of Revenue [Abstract]
Net sales	56,652	62,466
Technology Segment [Member] | Financial Services [Member]
Disaggregation of Revenue [Abstract]
Net sales	47,421	48,241
Technology Segment [Member] | SLED [Member]
Disaggregation of Revenue [Abstract]
Net sales	70,563	71,190
Technology Segment [Member] | Health Care [Member]
Disaggregation of Revenue [Abstract]
Net sales	46,535	56,109
Technology Segment [Member] | All others [Member]
Disaggregation of Revenue [Abstract]
Net sales	50,086	54,349
Technology Segment [Member] | Cisco Systems [Member]
Disaggregation of Revenue [Abstract]
Net sales	127,932	146,181
Technology Segment [Member] | NetApp [Member]
Disaggregation of Revenue [Abstract]
Net sales	15,421	13,427
Technology Segment [Member] | HP Inc. & HPE [Member]
Disaggregation of Revenue [Abstract]
Net sales	17,038	23,113
Technology Segment [Member] | Dell / EMC [Member]
Disaggregation of Revenue [Abstract]
Net sales	31,081	13,781
Technology Segment [Member] | Arista Networks [Member]
Disaggregation of Revenue [Abstract]
Net sales	6,820	20,950
Technology Segment [Member] | Juniper Networks [Member]
Disaggregation of Revenue [Abstract]
Net sales	13,579	7,054
Technology Segment [Member] | All others [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 129,353	$ 144,029