Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Feb. 29, 2012	May 31, 2011
ASSETS
Cash and cash equivalents	$ 8,878	$ 41,441
Accounts receivable, net of allowance for doubtful accounts of $482 and $602	32,473	30,616
Rental and lease equipment, net of accumulated depreciation of $199,515 and $191,160	240,580	195,632
Other property, net of accumulated depreciation and amortization of $17,587 and $16,825	13,908	14,127
Goodwill	3,109	3,109
Intangibles, net of amortization of $1,263 and $1,151	1,242	1,214
Other assets	20,783	19,788
Total assets	320,973	305,927
Liabilities:
Accounts payable	6,455	8,237
Accrued expenses	11,017	10,437
Deferred revenue	6,355	5,874
Deferred tax liability	50,690	41,004
Total liabilities	74,517	65,552
Commitments and contingencies (Note 13)
Shareholders' equity:
Preferred stock, $1 par - shares authorized 1,000,000, none issued
Common stock, no par - shares authorized 40,000,000; issued and outstanding February 29, 2012 - 23,987,826; May 31, 2011 - 23,980,581	35,784	34,742
Retained earnings	210,672	205,633
Total shareholders' equity	246,456	240,375
Total liabilities and shareholders' equity	$ 320,973	$ 305,927