Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 79,915	$ 111,532
Trade accounts receivable, net of allowance of $2,032 and $3,675, respectively	247,069	204,394
Accounts receivable-related parties	161	50
Income tax receivable	3,121	3,475
Inventories	44,557	34,240
Prepaid expenses	15,779	9,597
Other current assets	9,934	8,289
Deferred tax assets	14,664	31,436
Total current assets	415,200	403,013
Property and equipment, net	1,007,969	928,037
Deferred debt costs, net of amortization	15,350	16,145
Goodwill	78,011	110,914
Other intangible assets, net of amortization	71,173	77,555
Other assets	9,474	7,675
Total assets	1,597,177	1,543,339
Current liabilities:
Accounts payable	50,618	45,508
Accrued expenses	90,810	77,058
Current portion of long-term debt	48,575	41,394
Other current liabilities	6,135	688
Total current liabilities	196,138	164,648
Long-term debt, net of premium on notes of $1,217 and $1,459 at December 31, 2014 and 2013, respectively	882,572	846,691
Deferred tax liabilities	147,621	164,306
Other long-term liabilities	28,193	22,407
Commitments and contingencies
Stockholders' equity:
Preferred stock; $.01 par value; 5,000,000 shares authorized; none designated or issued at December 31, 2014 and December 31, 2013, respectively
Common stock; $.01 par value; 80,000,000 shares authorized; 43,500,032 shares issued and 42,241,719 shares outstanding at December 31, 2014; and 43,500,032 shares issued and 42,226,088 shares outstanding at December 31, 2013	435	435
Additional paid-in capital	369,920	363,674
Retained deficit	(15,067)	(6,726)
Treasury stock, at cost 1,258,313 and 1,273,944 shares at December 31, 2014 and 2013, respectively	(12,635)	(12,096)
Total stockholders' equity	342,653	345,287
Total liabilities and stockholders' equity	$ 1,597,177	$ 1,543,339