UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 95,634	$ 39,293
Restricted cash	6,788	12,772
Accounts receivable, net of allowance for doubtful accounts of $111 and $114, respectively	130,169	99,799
Accounts receivable – related party	5	0
Inventory	24,362	19,336
Derivative assets	1,005	61
Income tax receivable	6,189	13,288
Prepayments and other current assets	1,509	2,964
Total current assets	265,661	187,513
Property and equipment, net	90,739	94,134
Operating lease right-of-use assets, net	7,551	8,051
Intangible assets, net	3,509	4,106
Other assets	2,965	2,383
Total assets	370,425	296,187
Current liabilities:
Accounts payable	154,860	85,991
Derivative liabilities	964	52
Current portion of finance lease obligations	4,028	4,112
Current portion of operating lease liabilities	2,201	2,050
Other current liabilities	13,084	22,343
Total current liabilities	175,137	114,548
Other long-term liabilities:
Long-term debt	8,000	0
Asset retirement obligations	2,359	2,308
Finance lease obligations	10,434	11,507
Operating lease liabilities	5,353	6,000
Deferred taxes and other liabilities	11,060	12,732
Total liabilities	212,343	147,095
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, 4,251,015 and 4,243,716 shares outstanding, respectively	432	423
Contributed capital	16,375	13,340
Retained earnings	141,275	135,329
Total shareholders’ equity	158,082	149,092
Total liabilities and shareholders’ equity	$ 370,425	$ 296,187