Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 37,711	$ 65,291
Restricted cash		877
Accounts receivable, net of allowance of $1,580 and $459, respectively	229,885	234,456
Prepaid expenses and other current assets	31,228	41,434
Total current assets	298,824	342,058
Property and equipment, net of accumulated depreciation of $1,352,323 and $1,193,723, respectively	2,837,657	2,883,060
Restricted cash	218	131
Investment in direct financing lease		684
Goodwill	38,386	35,557
Non-current deferred tax assets	13,735	9,824
Other assets	82,784	84,704
Total assets	3,271,604	3,356,018
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	260,107	317,675
Income taxes payable	2,086	1,920
Current portion of long-term debt	10,000	5,000
Total current liabilities	272,193	324,595
Long-term debt, net	1,435,169	1,447,077
Deferred revenue	53,437	63,289
Other liabilities	51,842	58,309
Total liabilities	1,812,641	1,893,270
Commitments and contingencies
Preferred stock - $0.01 par value; 50,000 shares authorized; none issued and outstanding at December 31, 2016 and 2015, respectively	0	0
Common stock - $0.01 par value; 300,000 shares authorized; 117,554 and 117,232 shares issued and outstanding at December 31, 2016 and 2015, respectively	1,176	1,172
Additional paid-in capital	1,780,350	1,762,394
Accumulated deficit	(322,563)	(300,818)
Total stockholders' equity	1,458,963	1,462,748
Total liabilities and stockholders' equity	$ 3,271,604	$ 3,356,018