SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2012	Mar. 31, 2015 Segment	Mar. 31, 2014	Mar. 31, 2013
SEGMENT REPORTING [Abstract]
Number of business segment									2
Segment Reporting Information [Line Items]
Sales of product and services									$ 1,100,884	$ 1,013,374	$ 936,228
Financing revenue									34,728	35,896	38,384
Fee and other income									7,670	8,266	8,500
Net sales	267,265	306,241	297,472	272,304	259,908	267,182	271,129	259,317	1,143,282	1,057,536	983,112
Cost of sales, product and services									887,673	827,875	767,447
Direct lease costs									11,062	12,748	10,892
Cost of sales									898,735	840,623	778,339
Professional and other fees									6,508	9,041	13,098
Salaries and benefits									138,086	123,151	110,963
General and administrative expenses									26,864	22,675	20,099
Interest and financing costs									2,379	1,948	1,868
Operating expenses	43,666	44,876	43,598	41,697	40,653	38,696	38,085	39,381	173,837	156,815	146,028
Operating income	15,080	20,562	20,326	14,742	13,997	18,053	14,695	13,353	70,710	60,098	58,745
Other income	0	6,169	0	1,434					7,603	0	0
Earnings before provision for income taxes	15,080	26,731	20,326	16,176					78,313	60,098	58,745
Depreciation and amortization									15,575	14,755	12,168
Purchases of property, equipment and operating lease equipment									11,916	9,952	15,584
Total assets	571,546				553,845				571,546	553,845	439,895
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,143,282	1,057,536	983,112
Long-lived tangible assets	24,158				25,544				24,158	25,544
Revenue [Member]
Concentration Risk [Line Items]
Percentage of total revenues (in hundredths)										11.00%	14.00%
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,124,371	1,042,446	964,996
Long-lived tangible assets	22,550				24,596				22,550	24,596
Non U.S [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									18,911	15,090	18,116
Long-lived tangible assets	1,608				948				1,608	948
Technology [Member]
Segment Reporting Information [Line Items]
Sales of product and services									1,100,884	1,013,374	936,228
Financing revenue									0	0	0
Fee and other income									7,565	8,037	6,949
Net sales									1,108,449	1,021,411	943,177
Cost of sales, product and services									887,673	827,875	767,447
Direct lease costs									0	0	0
Cost of sales									887,673	827,875	767,447
Professional and other fees									5,340	7,557	9,638
Salaries and benefits									128,945	113,481	100,447
General and administrative expenses									25,437	21,103	19,028
Interest and financing costs									96	84	89
Operating expenses									159,818	142,225	129,202
Operating income									60,958	51,311	46,528
Other income									0	0	0
Earnings before provision for income taxes									60,958	51,311	46,528
Depreciation and amortization									4,450	2,838	2,369
Purchases of property, equipment and operating lease equipment									3,610	4,238	1,401
Total assets	368,971				335,879				368,971	335,879	255,257
Financing [Member]
Segment Reporting Information [Line Items]
Sales of product and services									0	0	0
Financing revenue									34,728	35,896	38,384
Fee and other income									105	229	1,551
Net sales									34,833	36,125	39,935
Cost of sales, product and services									0	0	0
Direct lease costs									11,062	12,748	10,892
Cost of sales									11,062	12,748	10,892
Professional and other fees									1,168	1,484	3,460
Salaries and benefits									9,141	9,670	10,516
General and administrative expenses									1,427	1,572	1,071
Interest and financing costs									2,283	1,864	1,779
Operating expenses									14,019	14,590	16,826
Operating income									9,752	8,787	12,217
Other income									7,603	0	0
Earnings before provision for income taxes									17,355	8,787	12,217
Depreciation and amortization									11,125	11,917	9,799
Purchases of property, equipment and operating lease equipment									8,306	5,714	14,183
Total assets	$ 202,575				$ 217,966				$ 202,575	$ 217,966	$ 184,638