SEGMENT REPORTING, Reportable Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Segment	Sep. 30, 2021 USD ($)	Mar. 31, 2022 USD ($)
SEGMENT REPORTING [Abstract]
Number of business segments | Segment			2
Reportable Segment Information [Abstract]
Net sales	$ 493,706	$ 458,017	$ 952,065	$ 874,666
Cost of Sales [Abstract]
Cost of sales	360,402	335,015	705,238	646,152
Gross profit	133,304	123,002	246,827	228,514
Selling, general, and administrative	84,704	74,504	161,471	143,279
Depreciation and amortization	3,568	3,853	6,778	7,779
Interest and financing costs	925	342	1,288	701
Operating expenses	89,197	78,699	169,537	151,759
Operating income	44,107	44,303	77,290	76,755
Other income (expense)	(3,866)	(325)	(6,019)	(202)
Earnings before tax	40,241	43,978	71,271	76,553
Net Sales [Abstract]
Contracts with customers	473,895	432,115	918,642	834,074
Financing and other	19,811	25,902	33,423	40,592
Net sales	493,706	458,017	952,065	874,666
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization	5,067	5,962	9,539	12,044
Purchases of property, equipment and operating lease equipment	633	9,249	2,410	16,243
Selected Financial Data - Balance Sheet [Abstract]
Total assets	1,371,340	1,139,945	1,371,340	1,139,945	$ 1,166,203
Product [Member]
Reportable Segment Information [Abstract]
Net sales	428,545	397,160	823,795	758,217
Cost of Sales [Abstract]
Cost of sales	317,127	297,629	621,337	574,856
Net Sales [Abstract]
Net sales	428,545	397,160	823,795	758,217
Service [Member]
Reportable Segment Information [Abstract]
Net sales	65,161	60,857	128,270	116,449
Cost of Sales [Abstract]
Cost of sales	43,275	37,386	83,901	71,296
Net Sales [Abstract]
Net sales	65,161	60,857	128,270	116,449
Technology Segment [Member]
Reportable Segment Information [Abstract]
Net sales	471,478	436,301	920,263	836,659
Net Sales [Abstract]
Contracts with customers	466,972	430,339	910,774	826,880
Financing and other	4,506	5,962	9,489	9,779
Net sales	471,478	436,301	920,263	836,659
Operating Segments [Member] | Technology Segment [Member]
Reportable Segment Information [Abstract]
Net sales	471,478	436,301	920,263	836,659
Cost of Sales [Abstract]
Cost of sales	355,203	331,223	698,337	636,148
Gross profit	116,275	105,078	221,926	200,511
Selling, general, and administrative	80,161	70,803	153,273	136,956
Depreciation and amortization	3,540	3,825	6,722	7,723
Interest and financing costs	671	199	809	358
Operating expenses	84,372	74,827	160,804	145,037
Operating income	31,903	30,251	61,122	55,474
Net Sales [Abstract]
Contracts with customers	466,972	430,339	910,774	826,880
Financing and other	4,506	5,962	9,489	9,779
Net sales	471,478	436,301	920,263	836,659
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization	3,871	4,074	7,386	8,177
Purchases of property, equipment and operating lease equipment	611	948	1,897	2,255
Selected Financial Data - Balance Sheet [Abstract]
Total assets	1,167,532	902,070	1,167,532	902,070
Operating Segments [Member] | Technology Segment [Member] | Product [Member]
Reportable Segment Information [Abstract]
Net sales	406,317	375,444	791,993	720,210
Cost of Sales [Abstract]
Cost of sales	311,928	293,837	614,436	564,852
Net Sales [Abstract]
Net sales	406,317	375,444	791,993	720,210
Operating Segments [Member] | Technology Segment [Member] | Service [Member]
Reportable Segment Information [Abstract]
Net sales	65,161	60,857	128,270	116,449
Cost of Sales [Abstract]
Cost of sales	43,275	37,386	83,901	71,296
Net Sales [Abstract]
Net sales	65,161	60,857	128,270	116,449
Operating Segments [Member] | Financing Segment [Member]
Reportable Segment Information [Abstract]
Net sales	22,228	21,716	31,802	38,007
Cost of Sales [Abstract]
Cost of sales	5,199	3,792	6,901	10,004
Gross profit	17,029	17,924	24,901	28,003
Selling, general, and administrative	4,543	3,701	8,198	6,323
Depreciation and amortization	28	28	56	56
Interest and financing costs	254	143	479	343
Operating expenses	4,825	3,872	8,733	6,722
Operating income	12,204	14,052	16,168	21,281
Net Sales [Abstract]
Contracts with customers	6,923	1,776	7,868	7,194
Financing and other	15,305	19,940	23,934	30,813
Net sales	22,228	21,716	31,802	38,007
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization	1,196	1,888	2,153	3,867
Purchases of property, equipment and operating lease equipment	22	8,301	513	13,988
Selected Financial Data - Balance Sheet [Abstract]
Total assets	203,808	237,875	203,808	237,875
Operating Segments [Member] | Financing Segment [Member] | Product [Member]
Reportable Segment Information [Abstract]
Net sales	22,228	21,716	31,802	38,007
Cost of Sales [Abstract]
Cost of sales	5,199	3,792	6,901	10,004
Net Sales [Abstract]
Net sales	22,228	21,716	31,802	38,007
Operating Segments [Member] | Financing Segment [Member] | Service [Member]
Reportable Segment Information [Abstract]
Net sales	0	0	0	0
Cost of Sales [Abstract]
Cost of sales	0	0	0	0
Net Sales [Abstract]
Net sales	$ 0	$ 0	$ 0	$ 0