CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 117,066	$ 109,393
Accounts receivable, net of allowance for doubtful accounts of $153 and $303, respectively	85,197	121,353
Accounts receivable – related party	425	0
Inventory	22,779	12,192
Derivative assets	162	166
Income tax receivable	2,404	1,317
Prepayments and other current assets	1,557	1,264
Total current assets	229,590	245,685
Property and equipment, net	44,623	29,362
Investment in unconsolidated affiliate	0	425
Cash deposits and other assets	4,657	7,232
Total assets	278,870	282,704
Current liabilities:
Accounts payable	116,068	124,706
Accounts payable – related party	29	5
Derivative liabilities	139	145
Current portion of capital lease obligations	883	338
Other current liabilities	6,148	4,404
Total current liabilities	123,267	129,598
Other long-term liabilities:
Asset retirement obligations	1,525	1,273
Capital lease obligations	3,209	1,351
Deferred taxes and other liabilities	4,271	3,363
Total liabilities	132,272	135,585
Commitments and contingencies (Note 15)
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	11,948	11,693
Retained earnings	134,228	135,004
Total shareholders’ equity	146,598	147,119
Total liabilities and shareholders’ equity	$ 278,870	$ 282,704