UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 127,670	$ 117,066
Restricted cash	4,876	0
Accounts receivable, net of allowance for doubtful accounts of $117 and $153, respectively	74,499	85,197
Accounts receivable – related party	0	425
Inventory	19,977	22,779
Derivative assets	240	162
Income tax receivable	2,217	2,404
Prepayments and other current assets	1,828	1,557
Total current assets	231,307	229,590
Property and equipment, net	55,555	44,623
Operating lease right-of-use assets	10,093
Intangible assets	1,936	0
Cash deposits and other assets	2,873	4,657
Total assets	301,764	278,870
Current liabilities:
Accounts payable	116,983	116,068
Accounts payable – related party	6	29
Derivative liabilities	236	139
Current portion of finance lease obligations	2,116	883
Current portion of operating lease liabilities	2,097
Other current liabilities	9,913	6,148
Total current liabilities	131,351	123,267
Other long-term liabilities:
Asset retirement obligations	1,550	1,525
Finance lease obligations	5,473	3,209
Operating lease liabilities	7,999
Deferred taxes and other liabilities	5,283	4,271
Total liabilities	151,656	132,272
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, 4,233,587 and 4,217,596 shares outstanding, respectively	423	422
Contributed capital	12,497	11,948
Retained earnings	137,188	134,228
Total shareholders’ equity	150,108	146,598
Total liabilities and shareholders’ equity	$ 301,764	$ 278,870