Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 33,831	$ 38,520
Restricted cash	47,727	47,703
Trade accounts receivable, net of allowance of $1,364 and $1,523, respectively	156,218	148,444
Accounts receivable - related parties	25	22
Income tax receivable	1,861	1,878
Inventories	37,215	36,403
Prepaid expenses	20,560	22,353
Other current assets	4,844	4,292
Total current assets	302,281	299,615
Property and equipment, net	491,266	502,579
Deferred debt costs, net of amortization	2,333	2,497
Intangible assets, net of amortization	3,161	3,221
Other assets	12,524	12,568
Total assets	811,565	820,480
Current liabilities:
Accounts payable	77,049	80,518
Accrued expenses	61,188	51,973
Current portion of long-term debt, net of discounts of $1,652 and $1,657, respectively	54,731	55,997
Other current liabilities	1,459	2,469
Total current liabilities	194,427	190,957
Long-term debt, net of discounts and deferred debt costs of $8,763 and $10,244, respectively	272,658	259,242
Deferred tax liabilities	0	78
Other long-term liabilities	30,902	31,550
Stockholders' equity:
Preferred stock; $0.01 par value; 5,000,000 shares authorized; none designated or issued at March 31, 2018 and December 31, 2017	0	0
Common stock; $0.01 par value; 80,000,000 shares authorized; 26,644,082 shares issued and 26,422,302 shares outstanding at March 31, 2018; 26,371,572 shares issued and 26,219,129 shares outstanding at December 31, 2017	266	264
Additional paid-in capital	446,022	439,517
Accumulated deficit	(127,205)	(96,674)
Treasury stock, at cost, 221,780 and 152,443 shares at March 31, 2018 and December 31, 2017, respectively	(5,505)	(4,454)
Total stockholders' equity	313,578	338,653
Total liabilities and stockholders' equity	$ 811,565	$ 820,480