Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash	$ 1,612	$ 1,229
Accounts Receivable, net of allowance for doubtful accounts of $3,000 in 2012 and $1,500 in 2011	92,256	92,671
Rental Equipment, at cost:
Relocatable Modular Buildings	551,101	539,147
Electronic Test Equipment	266,934	258,586
Liquid and Solid Containment Tanks and Boxes	254,810	201,456
Rental Equipment, gross	1,072,845	999,189
Less Accumulated Depreciation	(353,992)	(326,043)
Rental Equipment, net	718,853	673,146
Property, Plant and Equipment, net	101,031	94,702
Prepaid Expenses and Other Assets	19,507	17,170
Intangible Assets, net	11,487	12,311
Goodwill	27,700	27,700
Total Assets	972,446	918,929
Liabilities:
Notes Payable	302,000	296,500
Accounts Payable and Accrued Liabilities	52,220	58,854
Deferred Income	26,924	25,067
Deferred Income Taxes, net	226,564	205,366
Total Liabilities	607,708	585,787
Commitments and Contingencies (Note 7)
Shareholders' Equity:
Common Stock, no par value Authorized 40,000 shares Issued and Outstanding 24,931 shares as of December 31, 2012 and 24,576 shares as of December 31, 2011	85,342	74,878
Retained Earnings	279,396	258,264
Total Shareholders' Equity	364,738	333,142
Total Liabilities and Shareholders' Equity	$ 972,446	$ 918,929