UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 58,985	$ 39,293
Restricted cash	12,377	12,772
Accounts receivable, net of allowance for doubtful accounts of $113 and $114, respectively	111,068	99,799
Accounts receivable – related party	13	0
Inventory	29,223	19,336
Derivative assets	576	61
Income tax receivable	11,638	13,288
Prepayments and other current assets	3,621	2,964
Total current assets	227,501	187,513
Property and equipment, net	90,643	94,134
Operating lease right-of-use assets, net	7,774	8,051
Intangible assets, net	3,902	4,106
Other assets	2,482	2,383
Total assets	332,302	296,187
Current liabilities:
Accounts payable	122,155	85,991
Derivative liabilities	546	52
Current portion of finance lease obligations	4,494	4,112
Current portion of operating lease liabilities	2,172	2,050
Other current liabilities	19,888	22,343
Total current liabilities	149,255	114,548
Other long-term liabilities:
Asset retirement obligations	2,325	2,308
Finance lease obligations	12,202	11,507
Operating lease liabilities	5,603	6,000
Deferred taxes and other liabilities	11,900	12,732
Total liabilities	181,285	147,095
Commitments and contingencies (Note 14)
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	423	423
Contributed capital	13,494	13,340
Retained earnings	137,100	135,329
Total shareholders’ equity	151,017	149,092
Total liabilities and shareholders’ equity	$ 332,302	$ 296,187