Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash	$ 1,491	$ 1,238
Accounts receivable, net of allowance for doubtful accounts of $2,125 in 2021 and $2,100 in 2020	159,499	123,316
Rental equipment, at cost:
Relocatable modular buildings	1,040,094	882,115
Electronic test equipment	361,391	333,020
Liquid and solid containment tanks and boxes	309,908	315,706
Rental equipment, gross	1,711,393	1,530,841
Less: accumulated depreciation	(646,169)	(592,725)
Rental equipment, net	1,065,224	938,116
Property, plant and equipment, net	135,325	136,210
Prepaid expenses and other assets	54,945	41,549
Intangible assets, net	47,049	7,118
Goodwill	132,393	28,197
Total assets	1,595,926	1,275,744
Liabilities:
Notes payable	426,451	222,754
Accounts payable and accrued liabilities	136,313	108,334
Deferred income	58,716	45,975
Deferred income taxes, net	242,425	216,077
Total liabilities	863,905	593,140
Commitments and contingencies (Note 9)
Shareholders’ equity:
Common stock, no par value - Authorized 40,000 shares Issued and outstanding - 24,260 shares as of December 31, 2021 and 24,128 shares as of December 31, 2020	108,610	106,289
Retained earnings	623,465	576,419
Accumulated other comprehensive loss	(54)	(104)
Total shareholders’ equity	732,021	682,604
Total liabilities and shareholders’ equity	$ 1,595,926	$ 1,275,744