CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Feb. 28, 2014		Feb. 28, 2013		Feb. 28, 2014		Feb. 28, 2013
Revenues:
Rentals and leases	$ 32,485		$ 32,837		$ 103,347		$ 101,077
Sales of equipment and other revenues	29,531		31,835		76,713		87,288
Total revenues	62,016	[1]	64,672	[1]	180,060	[1]	188,365	[1]
Operating expenses:
Depreciation of rental and lease equipment	14,361		14,320		42,975		42,460
Costs of rentals and leases, excluding depreciation	4,493		4,721		14,103		13,651
Costs of sales of equipment and other revenues	21,583		23,471		54,800		63,684
Selling, general and administrative expenses	14,394		13,784		43,299		41,629
Total operating expenses	54,831		56,296		155,177		161,424
Operating profit	7,185		8,376		24,883		26,941
Interest income, net	106		61		275		344
Income before income taxes	7,291		8,437		25,158		27,285
Income tax provision	2,754		3,400		9,343		10,923
Net income	$ 4,537		$ 5,037		$ 15,815		$ 16,362
Earnings per share:
Basic (in dollars per share)	$ 0.19		$ 0.21		$ 0.65		$ 0.68
Diluted (in dollars per share)	$ 0.19		$ 0.21		$ 0.65		$ 0.68
Shares used in per share calculation:
Basic (in shares)	24,334		23,996		24,320		23,995
Diluted (in shares)	24,367		24,257		24,349		24,228
Cash dividend declared per share (in dollars per share)	$ 0.20		$ 0		$ 0.60		$ 1.60

[1] Revenues by country are based on the location of shipping destination, and not whether the order originates in the United States parent or a foreign subsidiary.