SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014 Segment	Mar. 31, 2013	Mar. 31, 2012
SEGMENT REPORTING [Abstract]
Number of business segment									2
Segment Reporting Information [Line Items]
Sales of product and services									$ 1,013,374	$ 936,228	$ 784,951
Financing revenue									35,896	38,384	30,899
Fee and other income									8,266	8,500	9,731
TOTAL REVENUES	259,908	267,182	271,129	259,317	236,312	242,025	260,051	244,724	1,057,536	983,112	825,581
Cost of sales, product and services									827,875	767,447	645,558
Direct lease costs									12,748	10,892	8,508
Professional and other fees									9,041	13,098	11,744
Salaries and benefits									123,151	110,963	98,268
General and administrative expenses									22,675	20,099	20,499
Interest and financing costs									1,948	1,868	1,430
Total costs and expenses									997,438	924,367	786,007
Earnings before provision for income taxes	13,997	18,053	14,695	13,353	12,745	15,529	16,908	13,563	60,098	58,745	39,574
Depreciation and amortization									14,755	12,168	9,365
Purchases of property, equipment and operating lease equipment									9,952	15,584	7,655
Total assets	553,845				439,895				553,845	439,895	433,688
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,057,536	983,112	825,581
Assets	553,845				439,895				553,845	439,895
Percentage of total revenues (in hundredths)									11.00%	14.00%
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,042,446	964,996	812,364
Assets	551,723				437,509				551,723	437,509
Non U.S [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									15,090	18,116	13,217
Assets	2,122				2,386				2,122	2,386
Technology [Member]
Segment Reporting Information [Line Items]
Sales of product and services									1,013,374	936,228	784,951
Financing revenue									0	0	0
Fee and other income									8,037	6,949	7,455
TOTAL REVENUES									1,021,411	943,177	792,406
Cost of sales, product and services									827,875	767,447	645,558
Direct lease costs									0	0	0
Professional and other fees									7,557	9,638	10,283
Salaries and benefits									113,481	100,447	88,321
General and administrative expenses									21,103	19,028	16,627
Interest and financing costs									84	89	93
Total costs and expenses									970,100	896,649	760,882
Earnings before provision for income taxes									51,311	46,528	31,524
Depreciation and amortization									2,838	2,369	1,476
Purchases of property, equipment and operating lease equipment									4,238	1,401	1,568
Total assets	335,879				255,257				335,879	255,257	241,488
Financing [Member]
Segment Reporting Information [Line Items]
Sales of product and services									0	0	0
Financing revenue									35,896	38,384	30,899
Fee and other income									229	1,551	2,276
TOTAL REVENUES									36,125	39,935	33,175
Cost of sales, product and services									0	0	0
Direct lease costs									12,748	10,892	8,508
Professional and other fees									1,484	3,460	1,461
Salaries and benefits									9,670	10,516	9,947
General and administrative expenses									1,572	1,071	3,872
Interest and financing costs									1,864	1,779	1,337
Total costs and expenses									27,338	27,718	25,125
Earnings before provision for income taxes									8,787	12,217	8,050
Depreciation and amortization									11,917	9,799	7,889
Purchases of property, equipment and operating lease equipment									5,714	14,183	6,087
Total assets	$ 217,966				$ 184,638				$ 217,966	$ 184,638	$ 192,200