SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Mar. 31, 2016 USD ($) Segment	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)
SEGMENT REPORTING [Abstract]
Number of business segment | Segment									2
Statement of Operations [Abstract]
Sales of product and services									$ 1,163,337	$ 1,100,884	$ 1,013,374
Financing revenue									35,091	34,728	35,896
Fee and other income									5,771	7,670	8,266
Net sales	$ 299,403	$ 298,644	$ 336,286	$ 269,866	$ 267,265	$ 306,241	$ 297,472	$ 272,304	1,204,199	1,143,282	1,057,536
Cost of sales, product and services									931,782	887,673	827,875
Direct lease costs									10,360	11,062	12,748
Cost of sales	232,457	234,584	264,365	210,736	208,519	240,803	233,548	215,865	942,142	898,735	840,623
Professional and other fees									6,546	6,508	9,041
Salaries and benefits									149,304	138,086	123,151
General and administrative expenses									23,130	22,531	19,883
Depreciation and amortization									5,548	4,333	2,792
Interest and financing costs									1,778	2,379	1,948
Operating expenses	50,567	46,415	45,260	44,064	43,666	44,876	43,598	41,697	186,306	173,837	156,815
Operating income	16,379	$ 17,645	$ 26,661	$ 15,066	15,080	$ 20,562	$ 20,326	$ 14,742	75,751	70,710	60,098
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization									15,980	15,575	14,755
Purchases of property, equipment and operating lease equipment									14,468	11,916	9,952
Selected Financial Data - Balance Sheet [Abstract]
Total assets	616,680				568,275				616,680	568,275	553,845
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,204,199	1,143,282	1,057,536
Long-lived tangible assets	24,059				24,158				24,059	24,158
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,186,904	1,124,371	1,042,446
Long-lived tangible assets	22,632				22,550				22,632	22,550
Non U.S [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									17,295	18,911	15,090
Long-lived tangible assets	1,427				1,608				1,427	1,608
Operating Segments [Member] | Technology [Member]
Statement of Operations [Abstract]
Sales of product and services									1,163,337	1,100,884	1,013,374
Financing revenue									0	0	0
Fee and other income									5,728	7,565	8,037
Net sales									1,169,065	1,108,449	1,021,411
Cost of sales, product and services									931,782	887,673	827,875
Direct lease costs									0	0	0
Cost of sales									931,782	887,673	827,875
Professional and other fees									5,505	5,340	7,557
Salaries and benefits									140,086	128,945	113,481
General and administrative expenses									22,401	21,127	18,334
Depreciation and amortization									5,532	4,310	2,769
Interest and financing costs									70	96	84
Operating expenses									173,594	159,818	142,225
Operating income									63,689	60,958	51,311
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization									5,641	4,450	2,838
Purchases of property, equipment and operating lease equipment									2,442	3,610	4,238
Selected Financial Data - Balance Sheet [Abstract]
Total assets	427,580				368,971				427,580	368,971	335,879
Operating Segments [Member] | Financing [Member]
Statement of Operations [Abstract]
Sales of product and services									0	0	0
Financing revenue									35,091	34,728	35,896
Fee and other income									43	105	229
Net sales									35,134	34,833	36,125
Cost of sales, product and services									0	0	0
Direct lease costs									10,360	11,062	12,748
Cost of sales									10,360	11,062	12,748
Professional and other fees									1,041	1,168	1,484
Salaries and benefits									9,218	9,141	9,670
General and administrative expenses									729	1,404	1,549
Depreciation and amortization									16	23	23
Interest and financing costs									1,708	2,283	1,864
Operating expenses									12,712	14,019	14,590
Operating income									12,062	9,752	8,787
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization									10,339	11,125	11,917
Purchases of property, equipment and operating lease equipment									12,026	8,306	5,714
Selected Financial Data - Balance Sheet [Abstract]
Total assets	$ 189,100				$ 199,304				$ 189,100	$ 199,304	$ 217,966
Revenue [Member]
Concentration Risk [Line Items]
Percentage of concentration risk											11.00%