Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 78,458	$ 47,918
Trade accounts receivable, net of allowance of $1,230 and $3,078, respectively	254,446	150,364
Accounts receivable-related parties	65	42
Income tax receivable	314	79,480
Inventories	34,963	21,556
Prepaid expenses	8,667	5,425
Other current assets	6,768	18,193
Deferred tax assets	39,154	8,290
Total current assets	422,835	331,268
Property and equipment, net	856,412	625,702
Deferred debt costs, net of amortization	16,131	6,835
Goodwill	82,571	16,150
Other intangible assets, net of amortization	74,637	45,833
Other assets	7,342	4,025
Total assets	1,459,928	1,029,813
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	56,957	40,477
Accrued expenses	65,096	51,237
Current portion of long-term debt	34,115	24,231
Other current liabilities	315	3,309
Total current liabilities	156,483	119,254
Long-term debt, net of discount or premium on notes of $1,892 and $9,425 at December 31, 2011 and 2010, respectively	748,976	474,628
Deferred tax liabilities	183,551	123,393
Other long-term liabilities	11,215	10,615
Commitments and contingencies
Stockholders' equity:
Preferred stock; $.01 par value; 5,000,000 shares authorized; none designated or issued at December 31, 2011 and December 31, 2010, respectively
Common stock; $.01 par value; 80,000,000 shares authorized; 42,530,809 shares issued and 42,486,645 shares outstanding at December 31, 2011; and 42,394,809 shares issued and 41,310,447 shares outstanding at December 31, 2010	425	424
Additional paid-in capital	345,619	335,927
Retained earnings (deficit)	13,659	(27,544)
Treasury stock, at cost 44,164 and 1,084,362 shares at December 31, 2011 and 2010, respectively		(6,884)
Total stockholders' equity	359,703	301,923
Total liabilities and stockholders' equity	$ 1,459,928	$ 1,029,813