UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 130,774	$ 109,393
Accounts receivable, net of allowance for doubtful accounts of $208 and $303, respectively	108,662	121,353
Inventory	34,760	12,192
Derivative assets	263	166
Income tax receivable	0	1,317
Prepayments and other current assets	1,271	1,264
Total current assets	275,730	245,685
Property and equipment, net	30,918	29,362
Investment in unconsolidated affiliate	425	425
Cash deposits and other assets	6,239	7,232
Total assets	313,312	282,704
Current liabilities:
Accounts payable	146,895	124,706
Accounts payable – related party	6	5
Derivative liabilities	247	145
Current portion of capital lease obligations	568	338
Other current liabilities	8,219	4,404
Total current liabilities	155,935	129,598
Other long-term liabilities:
Asset retirement obligations	1,414	1,273
Capital lease obligations	2,041	1,351
Deferred taxes and other liabilities	2,655	3,363
Total liabilities	162,045	135,585
Commitments and contingencies (Note 12)
Shareholders’ equity:
Preferred stock - $1.00 par value, 960,000 shares authorized, none outstanding	0	0
Common stock - $0.10 par value, 7,500,000 shares authorized, 4,217,596 shares outstanding	422	422
Contributed capital	11,837	11,693
Retained earnings	139,008	135,004
Total shareholders’ equity	151,267	147,119
Total liabilities and shareholders’ equity	$ 313,312	$ 282,704