Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 86,100	$ 46,732
Restricted cash	30,196	0
Trade accounts receivable, net of allowance of $2,029 and $2,670, respectively	78,767	102,127
Accounts receivable - related parties	26	35
Income tax receivable	1,276	1,828
Inventories	33,364	36,944
Prepaid expenses	14,271	13,851
Other current assets	9,101	9,968
Total current assets	253,101	211,485
Property and equipment, net	751,070	846,290
Deferred debt costs, net of amortization	1,573	3,420
Intangible assets, net of amortization	62,298	66,745
Other assets	10,316	10,241
Total assets	1,078,358	1,138,181
Current liabilities:
Accounts payable	33,033	54,521
Accrued expenses	75,457	59,380
Current portion of long-term debt	42,923	48,651
Other current liabilities	1,011	7,003
Total current liabilities	152,424	169,555
Long-term debt, net of unamortized premium on notes of $818 and $956, and deferred debt costs of $24,321 and $9,704, respectively	961,416	828,664
Deferred tax liabilities	662	5,066
Other long-term liabilities	26,263	28,558
Commitments and contingencies
Stockholders' equity:
Preferred stock; $0.01 par value; 5,000,000 shares authorized; none designated or issued at June 30, 2016 and December 31, 2015	0	0
Common stock; $0.01 par value; 80,000,000 shares authorized; 43,500,032 shares issued and 42,758,940 shares outstanding at June 30, 2016; 43,500,032 shares issued and 42,196,680 shares outstanding at December 31, 2015	435	435
Additional paid-in capital	374,711	374,729
Retained deficit	(430,034)	(256,812)
Treasury stock, at cost, 741,092 and 1,303,352 shares at June 30, 2016 and December 31, 2015, respectively	(7,519)	(12,014)
Total stockholders' (deficit) equity	(62,407)	106,338
Total liabilities and stockholders' equity	$ 1,078,358	$ 1,138,181