Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash	$ 1,229	$ 990
Accounts Receivable, net of allowance for doubtful accounts of $1,500 in 2011 and $1,700 in 2010	92,671	76,488
Income Taxes Receivable		6,131
Rental Equipment, at cost:
Relocatable Modular Buildings	539,147	514,548
Electronic Test Equipment	258,586	250,125
Liquid and Solid Containment Tanks and Boxes	201,456	133,095
Rental Equipment, gross	999,189	897,768
Less Accumulated Depreciation	(326,043)	(306,188)
Rental Equipment, net	673,146	591,580
Property, Plant and Equipment, net	94,702	83,861
Prepaid Expenses and Other Assets	17,170	13,944
Intangible Assets, net	12,311	12,868
Goodwill	27,700	27,700
Total Assets	918,929	813,562
Liabilities and Shareholders' Equity
Notes Payable	296,500	265,640
Accounts Payable and Accrued Liabilities	58,854	49,612
Deferred Income	25,067	23,790
Deferred Income Taxes, net	205,366	179,543
Total Liabilities	585,787	518,585
Commitments and Contingencies (Note 8)
Shareholders' Equity:
Common Stock, no par value - Authorized - 40,000 shares Issued and Outstanding - 24,576 shares in 2011 and 24,235 shares in 2010	74,878	63,623
Retained Earnings	258,264	231,354
Total Shareholders' Equity	333,142	294,977
Total Liabilities and Shareholders' Equity	$ 918,929	$ 813,562