Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net loss	$ (2,579)	$ (1,292)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation and amortization	45,526	46,285
Allowance for doubtful accounts	(164)	281
Gain on dispositions of property and equipment	(1,400)	(321)
Stock-based compensation expense	1,856	1,512
Amortization of debt issuance costs, discount and premium	869	762
Loss on extinguishment of debt	7,887	0
Deferred income taxes	(1,364)	(1,287)
Change in other long-term assets	4,193	(2,658)
Change in other long-term liabilities	651	953
Changes in current assets and liabilities:
Receivables	(5,158)	(4,252)
Inventory	(518)	(226)
Prepaid expenses and other current assets	2,703	3,640
Accounts payable	5,006	(6,713)
Deferred revenues	1,460	(1,663)
Accrued expenses	(17,733)	(17,864)
Net cash provided by operating activities	41,235	17,157
Cash flows from investing activities:
Purchases of property and equipment	(31,674)	(71,313)
Proceeds from sale of property and equipment	5,516	1,567
Net cash used in investing activities	(26,158)	(69,746)
Cash flows from financing activities:
Debt repayments	(119,478)	(656)
Proceeds from issuance of debt	320,000	40,000
Debt issuance costs	(6,138)	0
Change in restricted cash	(210,401)	0
Tender premium costs	(5,479)	0
Proceeds from exercise of options	277	295
Purchase of treasury stock	(433)	(275)
Net cash provided by (used in) financing activities	(21,652)	39,364
Net decrease in cash and cash equivalents	(6,575)	(13,225)
Beginning cash and cash equivalents	27,385	23,733
Ending cash and cash equivalents	20,810	10,508
Supplementary disclosure:
Interest paid	21,854	21,956
Income tax paid	$ 876	$ 320