UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Sales of product and services	$ 261,356	$ 247,037
Financing revenue	8,874	10,760
Fee and other income	2,074	1,520
TOTAL REVENUES	272,304	259,317
Cost of sales, product and services	212,908	203,330
Direct lease costs	2,957	3,253
Cost of revenues	215,865	206,583
Professional and other fees	1,833	3,238
Salaries and benefits	32,947	30,682
General and administrative expenses	6,273	5,001
Interest and financing costs	644	460
Operating expenses	41,697	39,381
OPERATING INCOME	14,742	13,353
Other income	1,434	0
EARNINGS BEFORE PROVISION FOR INCOME TAXES	16,176	13,353
PROVISION FOR INCOME TAXES	6,699	5,503
NET EARNINGS	$ 9,477	$ 7,850
NET EARNINGS PER COMMON SHARE-BASIC (In dollars per share)	$ 1.26	$ 0.98
NET EARNINGS PER COMMON SHARE-DILUTED (In dollars per share)	$ 1.25	$ 0.97
WEIGHTED AVERAGE SHARES OUTSTANDING-BASIC (In shares)	7,504	7,914
WEIGHTED AVERAGE SHARES OUTSTANDING-DILUTED (In shares)	7,559	7,985