Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash	$ 1,442	$ 1,508
Accounts receivable, net of allowance for doubtful accounts of $1,883 in 2019 and 2018	119,403	121,016
Rental equipment, at cost:
Relocatable modular buildings	834,883	817,375
Electronic test equipment	286,469	285,052
Liquid and solid containment tanks and boxes	314,899	313,573
Rental equipment, gross	1,436,251	1,416,000
Less accumulated depreciation	(523,373)	(514,985)
Rental equipment, net	912,878	901,015
Property, plant and equipment, net	127,736	126,899
Prepaid expenses and other assets	43,336	31,816
Intangible assets, net	7,030	7,254
Goodwill	27,808	27,808
Total assets	1,239,633	1,217,316
Liabilities:
Notes payable	289,464	298,564
Accounts payable and accrued liabilities	102,968	90,844
Deferred income	58,187	49,709
Deferred income taxes, net	208,371	206,664
Total liabilities	658,990	645,781
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	103,638	103,801
Retained earnings	477,081	467,783
Accumulated other comprehensive loss	(76)	(49)
Total shareholders’ equity	580,643	571,535
Total liabilities and shareholders’ equity	$ 1,239,633	$ 1,217,316