Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash	$ 707	$ 1,612
Accounts Receivable, net of allowance for doubtful accounts of $2,452 in 2013 and $3,000 in 2012	87,286	92,256
Rental Equipment, at cost:
Relocatable Modular Buildings	570,352	551,101
Electronic Test Equipment	264,429	266,934
Liquid and Solid Containment Tanks and Boxes	269,437	254,810
Rental Equipment, gross	1,104,218	1,072,845
Less Accumulated Depreciation	(366,582)	(353,992)
Rental Equipment, net	737,636	718,853
Property, Plant and Equipment, net	101,183	101,031
Prepaid Expenses and Other Assets	19,675	19,507
Intangible Assets, net	11,075	11,487
Goodwill	27,700	27,700
Total Assets	985,262	972,446
Liabilities:
Notes Payable	278,875	302,000
Accounts Payable and Accrued Liabilities	62,538	52,220
Deferred Income	25,936	26,924
Deferred Income Taxes, net	230,134	226,564
Total Liabilities	597,483	607,708
Shareholders' Equity:
Common Stock, no par value - Authorized - 40,000 shares Issued and Outstanding - 25,623 shares in 2013 and 24,931 shares in 2012	101,711	85,342
Retained Earnings	286,068	279,396
Total Shareholders' Equity	387,779	364,738
Total Liabilities and Shareholders' Equity	$ 985,262	$ 972,446