CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Cash flows from operating activities:
Net income	$ 11,278	$ 11,325
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,248	28,779
Remeasurement loss on foreign currency	85	47
Provision for losses on accounts receivable	341	235
Gain on sale of rental and lease equipment	(6,504)	(5,845)
Stock compensation expense	724	639
Excess tax benefit for share based compensation	(131)	(113)
Deferred income taxes	(4,157)	(1,885)
Change in operating assets and liabilities:
Accounts receivable	(226)	(793)
Other assets	(2,656)	596
Accounts payable	(8)	(1,091)
Accrued expenses	(2,075)	1,300
Deferred revenue	422	(229)
Net cash provided by operating activities	26,341	32,965
Cash flows from investing activities:
Proceeds from sale of rental and lease equipment	15,125	14,185
Payments for purchase of rental and lease equipment	(31,790)	(35,959)
Payments for purchase of other property	(343)	(511)
Net cash used in investing activities	(17,008)	(22,285)
Cash flows from financing activities:
Net repayments under bank line of credit	(1,492)
Minimum tax withholdings on share based compensation		(36)
Excess tax benefit for share based compensation	131	113
Payment of dividends	(9,924)	(9,729)
Net cash used in financing activities	(11,285)	(9,652)
Effect of exchange rate changes on cash	(259)	(301)
Net increase (decrease) in cash and cash equivalents	(2,211)	727
Cash and cash equivalents at beginning of period	10,402	9,290
Cash and cash equivalents at end of period	8,191	10,017
Dividends accrued during the period, not yet paid	$ 161	$ 29,186