Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Cash	$ 340	$ 1,229
Accounts Receivable, net of allowance for doubtful accounts of $2,200 in 2012 and $1,500 in 2011	86,402	92,671
Rental Equipment, at cost:
Relocatable Modular Buildings	547,248	539,147
Electronic Test Equipment	270,747	258,586
Liquid and Solid Containment Tanks and Boxes	235,022	201,456
Rental Equipment, gross	1,053,017	999,189
Less Accumulated Depreciation	(342,099)	(326,043)
Rental Equipment, net	710,918	673,146
Property, Plant and Equipment, net	99,731	94,702
Prepaid Expenses and Other Assets	26,659	17,170
Intangible Assets, net	11,899	12,311
Goodwill	27,700	27,700
Total Assets	963,649	918,929
Liabilities:
Notes Payable	308,000	296,500
Accounts Payable and Accrued Liabilities	64,822	58,854
Deferred Income	28,714	25,067
Deferred Income Taxes, net	214,613	205,366
Total Liabilities	616,149	585,787
Shareholders' Equity:
Common Stock, no par value - Authorized - 40,000 shares Issued and Outstanding - 24,772 shares in 2012 and 24,576 shares in 2011	80,725	74,878
Retained Earnings	266,775	258,264
Total Shareholders' Equity	347,500	333,142
Total Liabilities and Shareholders' Equity	$ 963,649	$ 918,929