Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash	$ 4,399	$ 2,501
Accounts receivable, net of allowance for doubtful accounts of $1,883 in 2018 and $1,987 in 2017	115,089	105,872
Rental equipment, at cost:
Relocatable modular buildings	801,129	775,400
Electronic test equipment	284,647	262,325
Liquid and solid containment tanks and boxes	312,487	309,808
Rental equipment, gross	1,398,263	1,347,533
Less accumulated depreciation	(509,656)	(485,213)
Rental equipment, net	888,607	862,320
Property, plant and equipment, net	125,756	119,170
Prepaid expenses and other assets	32,660	22,459
Intangible assets, net	7,480	7,724
Goodwill	27,808	27,808
Total assets	1,201,799	1,147,854
Liabilities:
Notes payable	309,006	303,414
Accounts payable and accrued liabilities	92,443	86,408
Deferred income	48,192	39,219
Deferred income taxes, net	197,611	194,629
Total liabilities	647,252	623,670
Shareholders’ equity:
Common stock, no par value - Authorized 40,000 shares Issued and outstanding - 24,176 shares as of September 30,2018 and 24,052 shares as of December 31, 2017	102,753	102,947
Retained earnings	451,794	421,405
Accumulated other comprehensive income (loss)		(168)
Total shareholders’ equity	554,547	524,184
Total liabilities and shareholders’ equity	$ 1,201,799	$ 1,147,854