SEGMENT REPORTING, Technology Segment Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Abstract]
Net sales	$ 356,532	$ 373,356
Financing and Other	(14,477)	(11,180)
Revenue from contracts with customers	342,055	362,176
Technology Segment [Member]
Disaggregation of Revenue [Abstract]
Net sales	346,864	362,899
Financing and Other	(5,405)	(3,538)
Revenue from contracts with customers	341,459	359,361
Technology Segment [Member] | Technology [Member]
Disaggregation of Revenue [Abstract]
Net sales	82,817	89,355
Technology Segment [Member] | Telecom, Media & Entertainment [Member]
Disaggregation of Revenue [Abstract]
Net sales	46,868	57,405
Technology Segment [Member] | Financial Services [Member]
Disaggregation of Revenue [Abstract]
Net sales	45,225	38,291
Technology Segment [Member] | SLED [Member]
Disaggregation of Revenue [Abstract]
Net sales	68,205	77,163
Technology Segment [Member] | Healthcare [Member]
Disaggregation of Revenue [Abstract]
Net sales	46,450	46,486
Technology Segment [Member] | All others [Member]
Disaggregation of Revenue [Abstract]
Net sales	57,299	54,199
Technology Segment [Member] | Cisco Systems [Member]
Disaggregation of Revenue [Abstract]
Net sales	139,577	174,256
Technology Segment [Member] | NetApp [Member]
Disaggregation of Revenue [Abstract]
Net sales	15,020	15,540
Technology Segment [Member] | HP Inc. & HPE [Member]
Disaggregation of Revenue [Abstract]
Net sales	20,355	28,360
Technology Segment [Member] | Arista Networks [Member]
Disaggregation of Revenue [Abstract]
Net sales	19,844	17,451
Technology Segment [Member] | Juniper [Member]
Disaggregation of Revenue [Abstract]
Net sales	10,431	9,381
Technology Segment [Member] | All others [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 141,637	$ 117,911