Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 57,450	$ 111,532
Trade accounts receivable, net of allowance of $2,226 and $3,675, respectively	262,357	204,394
Accounts receivable - related parties	61	50
Income tax receivable		3,475
Inventories	43,080	34,240
Prepaid expenses	19,156	9,597
Other current assets	9,986	8,289
Deferred tax assets	23,744	31,436
Total current assets	415,834	403,013
Property and equipment, net	981,910	928,037
Deferred debt costs, net of amortization	13,800	16,145
Goodwill	112,714	110,914
Other intangible assets, net of amortization	73,351	77,555
Other assets	8,240	7,675
Total assets	1,605,849	1,543,339
Current liabilities:
Accounts payable	56,178	45,508
Accrued expenses	78,622	77,058
Income tax payable	152
Current portion of long-term debt	43,921	41,394
Other current liabilities	8,300	688
Total current liabilities	187,173	164,648
Long-term debt, net of unamortized premium on notes of $1,280 and $1,459, respectively	865,708	846,691
Deferred tax liabilities	162,652	164,306
Other long-term liabilities	26,208	22,407
Commitments and contingencies
Stockholders' equity:
Preferred stock; $0.01 par value; 5,000,000 shares authorized; none designated or issued at September 30, 2014 and December 31, 2013
Common stock; $0.01 par value; 80,000,000 shares authorized; 43,500,032 shares issued and 43,183,490 shares outstanding at September 30, 2014; 43,500,032 shares issued and 42,26,088 shares outstanding at December 31, 2013	435	435
Additional paid-in capital	366,149	363,674
Retained deficit	3,741	(6,726)
Treasury stock, at cost, 316,542 and 1,273,944 shares at September 30, 2014 and December 31, 2013, respectively	(6,217)	(12,096)
Total stockholders' equity	364,108	345,287
Total liabilities and stockholders' equity	$ 1,605,849	$ 1,543,339