CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 63,130	$ 55,802
Accounts receivable, net of allowance of $1,318 and $1,218, respectively	250,445	269,685
Deferred tax assets	7,976	11,768
Prepaid expenses and other current assets	26,448	18,676
Current assets of discontinued operations	12	3,498
Total current assets	348,011	359,429
Property and equipment, net	2,592,252	2,608,740
Restricted cash	5,018	5,013
Investment in direct financing lease	8,376	9,233
Goodwill	11,988	11,988
Other assets	30,357	25,047
Non-current assets of discontinued operations		181
Total assets	2,996,002	3,019,631
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	168,311	195,726
Income taxes payable	94	605
Current liabilities of discontinued operations	1,170	2,031
Total current liabilities	169,575	198,362
Long-term debt	1,190,764	1,245,014
Deferred tax liabilities	136,316	136,503
Other liabilities	34,777	31,730
Total liabilities	1,531,432	1,611,609
Commitments and contingencies
Preferred stock-$0.01 par value; 50,000 shares authorized; none issued and outstanding at June 30, 2012 and December 31, 2011, respectively
Common stock-$0.01 par value; 300,000 shares authorized; 99,977 and 99,528 shares issued and outstanding at June 30, 2012 and December 31, 2011, respectively	1,000	995
Additional paid-in capital	1,137,024	1,129,435
Retained earnings	326,546	277,592
Total stockholders' equity	1,464,570	1,408,022
Total liabilities and stockholders' equity	$ 2,996,002	$ 3,019,631