Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 42,731	$ 65,291
Restricted cash		877
Accounts receivable, net of allowance of $414 and $459, respectively	222,420	234,456
Prepaid expenses and other current assets	32,742	41,434
Total current assets	297,893	342,058
Property and equipment, net of accumulated depreciation of $1,319,452 and $1,193,723, respectively	2,850,219	2,883,060
Restricted cash	218	131
Investment in direct financing lease		684
Goodwill	38,386	35,557
Non-current deferred tax assets	11,973	9,824
Other assets	86,823	84,704
Total assets	3,285,512	3,356,018
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	329,446	317,675
Income taxes payable	1,627	1,920
Current portion of long-term debt	8,750	5,000
Total current liabilities	339,823	324,595
Long-term debt, net	1,420,155	1,447,077
Deferred revenue	36,257	63,289
Other liabilities	45,084	58,309
Total liabilities	1,841,319	1,893,270
Commitments and contingencies
Preferred stock - $0.01 par value; 50,000 shares authorized; none issued and outstanding at September 30, 2016 and December 31, 2015, respectively	0	0
Common stock - $0.01 par value; 300,000 shares authorized; 117,551 and 117,232 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	1,176	1,172
Additional paid-in capital	1,776,504	1,762,394
Accumulated deficit	(333,487)	(300,818)
Total stockholders' equity	1,444,193	1,462,748
Total liabilities and stockholders' equity	$ 3,285,512	$ 3,356,018

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.