CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Accounts receivable, allowance for doubtful accounts	$ 1,440	$ 1,340
Rental equipment net of accumulated depreciation	2,004,961	1,807,010
Rental equipment, accumulated depreciation	505,546	421,153
Net investment in direct finance leases	246,450	80,582
Intangible assets, accumulated amortization	3,407	2,681
Furniture, fixtures and equipment, accumulated depreciation	3,201	2,833
Current liabilities
Current portion of debt	132,049	95,527
Debt	$ 1,570,773	$ 1,380,499
Stockholders' equity
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	84,000,000	84,000,000
Common stock, shares issued	20,390,622	19,057,217
Common stock, shares outstanding	20,390,622	19,057,217
Variable Interest Entity, Primary Beneficiary [Member]
Current assets
Cash	$ 20,685	$ 30,449
Rental equipment net of accumulated depreciation	61,842	62,477
Net investment in direct finance leases	4,423	7,331
Current liabilities
Current portion of debt	22,549	30,980
Debt	$ 72,727	$ 74,887