CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Cash flows from operating activities:
Net income	$ 15,815	$ 16,362
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	43,922	43,422
Remeasurement losses on foreign currency	71	135
Provision for losses on accounts receivable	490	360
Gain on sale of rental and lease equipment	(10,837)	(8,785)
Stock compensation expense	1,036	983
Excess tax benefit for share based compensation	(156)	(247)
Deferred income taxes	(6,506)	(637)
Change in operating assets and liabilities:
Accounts receivable	197	(315)
Other assets	(2,969)	(4,559)
Accounts payable	285	620
Accrued expenses	(2,893)	1,188
Deferred revenue	(121)	(543)
Net cash provided by operating activities	38,334	47,984
Cash flows from investing activities:
Proceeds from sale of rental and lease equipment	24,459	21,665
Payments for purchase of rental and lease equipment	(44,723)	(48,794)
Payments for purchase of other property	(352)	(803)
Net cash used in investing activities	(20,616)	(27,932)
Cash flows from financing activities:
Borrowings under bank lines of credit	43,758	31,500
Payments under bank lines of credit	(51,733)	(15,000)
Minimum tax withholdings on share based compensation	(11)	(36)
Excess tax benefit for share based compensation	156	247
Payment of dividends	(14,791)	(39,003)
Net cash used in financing activities	(22,621)	(22,292)
Effect of exchange rate changes on cash	(285)	(345)
Net decrease in cash and cash equivalents	(5,188)	(2,585)
Cash and cash equivalents at beginning of period	10,402	9,290
Cash and cash equivalents at end of period	$ 5,214	$ 6,705