Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash	$ 2,380	$ 1,238
Accounts receivable, net of allowance for doubtful accounts of $2,225 in 2021 and $2,100 in 2020	168,831	123,316
Rental equipment, at cost:
Relocatable modular buildings	1,023,344	882,115
Electronic test equipment	363,799	333,020
Liquid and solid containment tanks and boxes	311,677	315,706
Rental equipment, gross	1,698,820	1,530,841
Less: accumulated depreciation	(635,358)	(592,725)
Rental equipment, net	1,063,462	938,116
Property, plant and equipment, net	135,055	136,210
Prepaid expenses and other assets	59,523	41,549
Intangible assets, net	48,715	7,118
Goodwill	132,387	28,197
Total assets	1,610,353	1,275,744
Liabilities:
Notes payable	459,475	222,754
Accounts payable and accrued liabilities	137,308	108,334
Deferred income	69,634	45,975
Deferred income taxes, net	231,480	216,077
Total liabilities	897,897	593,140
Shareholders’ equity:
Common stock, no par value - Authorized 40,000 shares Issued and outstanding - 24,247 shares as of September 30, 2021 and 24,128 shares as of December 31, 2020	106,744	106,289
Retained earnings	605,754	576,419
Accumulated other comprehensive loss	(42)	(104)
Total shareholders’ equity	712,456	682,604
Total liabilities and shareholders’ equity	$ 1,610,353	$ 1,275,744