CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 227,246	$ 56,283
Accounts receivable, net of allowance for doubtful accounts of $2,602 and $2,464, respectively	26,352	23,702
Prepaid expenses and other current assets	11,135	8,654
Total current assets	264,733	88,639
Property and equipment, net	312,149	280,455
Deposits and other assets - $471 and $462 restricted, respectively	11,014	7,009
Total assets	587,896	376,103
Current liabilities:
Accounts payable	10,938	15,979
Accrued liabilities	23,966	19,538
Current maturities, capital lease obligations	8,204	6,143
Total current liabilities	43,108	41,660
Senior secured notes	175,000
Capital lease obligations, net of current maturities	127,444	105,562
Convertible senior notes, net of discount of $18,120 and $20,758, respectively	73,858	71,220
Other long term liabilities	6,232	5,860
Total liabilities	425,642	224,302
Commitments and contingencies:
Stockholders' equity:
Common stock, $0.001 par value; 75,000,000 shares authorized; 46,028,272 and 45,838,510 shares issued and outstanding, respectively	46	46
Additional paid-in capital	487,523	482,737
Accumulated other comprehensive income	4,874	1,044
Accumulated deficit	(330,189)	(332,026)
Total stockholders' equity	162,254	151,801
Total liabilities and stockholders' equity	$ 587,896	$ 376,103