Consolidated Balance Sheets - Entity [Domain] - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 41,069	$ 74,393
Restricted cash	1,641
Accounts receivable, net of allowance of $1,407 and $748, respectively	229,541	248,588
Current deferred tax assets	8,884	13,229
Prepaid expenses and other current assets	41,347	29,775
Total current assets	322,482	365,985
Property and equipment, net	2,755,292	2,658,628
Restricted cash	114	2,858
Investment in direct financing lease	1,992	3,223
Goodwill	15,155	16,110
Non-current deferred tax assets	4,035	2,301
Other assets	76,096	78,086
Total assets	3,175,166	3,127,191
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	307,591	317,566
Income taxes payable	1,086	1,368
Current liabilities of discontinued operations		54
Total current liabilities	308,677	318,988
Long-term debt	1,238,000	1,200,000
Deferred revenue	82,976	87,227
Other liabilities	64,352	39,476
Total liabilities	$ 1,694,005	$ 1,645,691
Commitments and contingencies
Preferred stock - $0.01 par value; 50,000 shares authorized; none issued and outstanding at June 30, 2015 and December 31, 2014, respectively	$ 0	$ 0
Common stock - $0.01 par value; 300,000 shares authorized; 117,119 and 116,764 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	1,171	1,168
Additional paid-in capital	1,752,646	1,748,303
Accumulated deficit	(272,656)	(267,971)
Total stockholders' equity	1,481,161	1,481,500
Total liabilities and stockholders' equity	$ 3,175,166	$ 3,127,191