SEGMENT REPORTING (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
Segment
Sep. 30, 2015
USD ($)
Mar. 31, 2016
USD ($)
SEGMENT REPORTING [Abstract]          
Number of business segments | Segment     2    
Segment Reporting Information [Line Items]          
Sales of product and services $ 361,227 $ 324,259 $ 651,408 $ 583,955  
Financing revenue 8,722 10,279 15,709 18,625  
Fee and other income 1,513 1,748 2,848 3,572  
Net sales 371,462 336,286 669,965 606,152  
Cost of sales, product and services 288,204 261,208 518,051 468,926  
Direct lease costs 1,325 3,157 2,317 6,175  
Cost of sales 289,529 264,365 520,368 475,101  
Professional and other fees 1,735 1,513 3,521 3,031  
Salaries and benefits 42,296 35,740 82,094 70,954  
General and administrative expenses 7,576 6,385 14,046 11,956  
Depreciation and amortization 1,723 1,200 3,498 2,408  
Interest and financing costs 400 422 749 975  
Operating expenses 53,730 45,260 103,908 89,324  
Operating income 28,203 26,661 45,689 41,727  
Selected Financial Data - Statement of Cash Flow [Abstract]          
Depreciation and amortization 3,057 4,268 5,832 8,503  
Purchases of property, equipment and operating lease equipment 2,279 8,694 3,169 15,618  
Selected Financial Data - Balance Sheet [Abstract]          
Total assets 680,894 590,487 680,894 590,487 $ 616,680
Operating Segments [Member] | Technology [Member]          
Segment Reporting Information [Line Items]          
Sales of product and services 361,227 324,259 651,408 583,955  
Financing revenue 0 0 0 0  
Fee and other income 1,488 1,721 2,764 3,532  
Net sales 362,715 325,980 654,172 587,487  
Cost of sales, product and services 288,204 261,208 518,051 468,926  
Direct lease costs 0 0 0 0  
Cost of sales 288,204 261,208 518,051 468,926  
Professional and other fees 1,425 1,305 2,922 2,567  
Salaries and benefits 40,182 33,476 77,667 66,428  
General and administrative expenses 6,695 6,126 12,926 11,451  
Depreciation and amortization 1,721 1,196 3,492 2,400  
Interest and financing costs 0 22 0 41  
Operating expenses 50,023 42,125 97,007 82,887  
Operating income 24,488 22,647 39,114 35,674  
Selected Financial Data - Statement of Cash Flow [Abstract]          
Depreciation and amortization 1,765 1,229 3,553 2,466  
Purchases of property, equipment and operating lease equipment 912 576 1,564 1,194  
Selected Financial Data - Balance Sheet [Abstract]          
Total assets 484,178 379,378 484,178 379,378  
Operating Segments [Member] | Financing [Member]          
Segment Reporting Information [Line Items]          
Sales of product and services 0 0 0 0  
Financing revenue 8,722 10,279 15,709 18,625  
Fee and other income 25 27 84 40  
Net sales 8,747 10,306 15,793 18,665  
Cost of sales, product and services 0 0 0 0  
Direct lease costs 1,325 3,157 2,317 6,175  
Cost of sales 1,325 3,157 2,317 6,175  
Professional and other fees 310 208 599 464  
Salaries and benefits 2,114 2,264 4,427 4,526  
General and administrative expenses 881 259 1,120 505  
Depreciation and amortization 2 4 6 8  
Interest and financing costs 400 400 749 934  
Operating expenses 3,707 3,135 6,901 6,437  
Operating income 3,715 4,014 6,575 6,053  
Selected Financial Data - Statement of Cash Flow [Abstract]          
Depreciation and amortization 1,292 3,039 2,279 6,037  
Purchases of property, equipment and operating lease equipment 1,367 8,118 1,605 14,424  
Selected Financial Data - Balance Sheet [Abstract]          
Total assets $ 196,716 $ 211,109 $ 196,716 $ 211,109