UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Sales of product and services	$ 255,747	$ 228,053	$ 764,067	$ 712,513
Financing revenue	9,228	12,510	27,989	27,823
Fee and other income	2,207	1,462	5,572	6,464
TOTAL REVENUES	267,182	242,025	797,628	746,800
COSTS AND EXPENSES
Cost of sales, product and services	207,378	188,103	625,562	587,693
Direct lease costs	3,055	2,934	9,803	7,638
Total cost of sales	210,433	191,037	635,365	595,331
Professional and other fees	2,008	2,498	7,154	8,318
Salaries and benefits	30,795	27,535	91,162	80,808
General and administrative expenses	5,397	4,909	16,457	14,975
Interest and financing costs	496	517	1,389	1,368
Total expenses	38,696	35,459	116,162	105,469
TOTAL COSTS AND EXPENSES	249,129	226,496	751,527	700,800
EARNINGS BEFORE PROVISION FOR INCOME TAXES	18,053	15,529	46,101	46,000
PROVISION FOR INCOME TAXES	7,443	6,496	19,050	18,872
NET EARNINGS	$ 10,610	$ 9,033	$ 27,051	$ 27,128
NET EARNINGS PER COMMON SHARE-BASIC (In dollars per share)	$ 1.33	$ 1.11	$ 3.37	$ 3.42
NET EARNINGS PER COMMON SHARE-DILUTED (In dollars per share)	$ 1.32	$ 1.11	$ 3.34	$ 3.38
WEIGHTED AVERAGE SHARES OUTSTANDING-BASIC (In shares)	7,950,354	7,843,153	7,946,746	7,778,174
WEIGHTED AVERAGE SHARES OUTSTANDING-DILUTED (In shares)	7,982,418	7,843,153	8,012,840	7,867,982