Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 42,735	$ 37,711
Accounts receivable, net of allowance of $572 and $1,580, respectively	241,143	229,885
Prepaid expenses and other current assets	20,178	31,228
Total current assets	304,056	298,824
Property and equipment, net of accumulated depreciation of $1,441,951 and $1,352,323, respectively	2,799,476	2,837,657
Goodwill	38,728	38,386
Non-current deferred tax assets	15,460	13,735
Other assets	85,046	83,002
Total assets	3,242,766	3,271,604
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	266,405	260,107
Income taxes payable	1,168	2,086
Current portion of long-term debt	10,000	10,000
Total current liabilities	277,573	272,193
Long-term debt, net	1,411,210	1,435,169
Deferred revenue	43,143	53,437
Other liabilities	52,159	51,842
Total liabilities	1,784,085	1,812,641
Commitments and contingencies
Preferred stock – $0.01 par value; 50,000 shares authorized; none issued and outstanding at September 30, 2017 and December 31, 2016, respectively	0	0
Common stock – $0.01 par value; 300,000 shares authorized; 118,191 and 117,554 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively	1,182	1,176
Additional paid-in capital	1,793,568	1,780,350
Accumulated deficit	(336,069)	(322,563)
Total stockholders' equity	1,458,681	1,458,963
Total liabilities and stockholders' equity	$ 3,242,766	$ 3,271,604