UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 130,893	$ 117,066
Accounts receivable, net of allowance for doubtful accounts of $121 and $153, respectively	88,095	85,197
Accounts receivable – related party	0	425
Inventory	29,237	22,779
Derivative assets	274	162
Income tax receivable	1,978	2,404
Prepayments and other current assets	1,609	1,557
Total current assets	252,086	229,590
Property and equipment, net	48,917	44,623
Operating lease right-of-use assets	10,681
Cash deposits and other assets	2,951	4,657
Total assets	314,635	278,870
Current liabilities:
Accounts payable	133,325	116,068
Accounts payable – related party	6	29
Derivative liabilities	270	139
Less: Current portion of lease obligation	1,002	883
Current portion of operating lease liabilities	2,160
Other current liabilities	8,580	6,148
Total current liabilities	145,343	123,267
Other long-term liabilities:
Asset retirement obligations	1,538	1,525
Total long-term lease obligation	3,428	3,209
Operating lease liabilities	8,523
Deferred taxes and other liabilities	5,104	4,271
Total liabilities	163,936	132,272
Commitments and contingencies (Note 13)
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, 4,217,971 and 4,217,596 shares outstanding, respectively	422	422
Contributed capital	12,071	11,948
Retained earnings	138,206	134,228
Total shareholders’ equity	150,699	146,598
Total liabilities and shareholders’ equity	$ 314,635	$ 278,870