Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating activities:
Net loss	$ (134,287,000)	$ (631,000)	$ (11,685,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	63,766,000	72,235,000	83,236,000
(Gain) loss on derivative instruments		(1,511,000)	1,511,000
Goodwill impairment charge	92,614,000	0
Loss on early retirement of debt	312,000	158,000	1,050,000
Share-based compensation and restricted stock	1,278,000	1,618,000	1,762,000
Deferred tax expense (benefit)	3,256,000	(3,256,000)
Other, net	2,116,000	1,083,000	304,000
Change in operating assets and liabilities:
Accounts receivable, net	12,733,000	(6,406,000)	2,571,000
Other current assets	2,737,000	2,135,000	(1,063,000)
Accounts payable	14,040,000	(11,980,000)	21,410,000
Accrued expenses and deferred revenue	2,198,000	(2,374,000)	4,268,000
Other	(2,766,000)	969,000	(1,658,000)
Net cash provided by operating activities	57,997,000	52,040,000	101,706,000
Investing activities:
Property and equipment additions	(35,631,000)	(27,318,000)	(21,825,000)
Net cash used for investing activities	(35,631,000)	(27,318,000)	(21,825,000)
Financing activities:
Repayment of long-term debt	(39,500,000)	(10,525,000)	(101,408,000)
Payment of capital lease obligations	(555,000)	(717,000)	(1,031,000)
Borrowings on revolving credit facility	62,000,000	75,000,000	45,000,000
Repayments of revolving credit facility	(41,000,000)	(75,000,000)	(45,000,000)
Debt issuance costs	0	(2,658,000)	0
Proceeds from investment in long-term debt	2,306,000	614,000	5,921,000
Proceeds from issuance of common stock, net of offering costs			13,658,000
Payment of dividends to preferred shareholders	(4,295,000)	(5,750,000)	(5,750,000)
Exercise of stock options	10,000	9,000	49,000
Proceeds from issuance of stock warrants			46,000
Net cash used for financing activities	(21,034,000)	(19,027,000)	(88,515,000)
Effect of exchange rates on cash	22,000	(57,000)	4,000
Increase (decrease) in cash	1,354,000	5,638,000	(8,630,000)
Cash at beginning of period	14,019,000	8,381,000	17,011,000
Cash at end of period	$ 15,373,000	$ 14,019,000	$ 8,381,000