Condensed Consolidating Financial Information (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Assets
Current assets	$ 197,988	$ 238,400
Property and equipment, net	167,362	212,636
Other non-current assets	50,363	63,136
Total assets	415,713	514,172	650,308
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	167,812	215,323
Long-term debt and capital lease obligations, net of current portion	349,646	350,183
Deferred income taxes and other non-current liabilities	72,797	62,394
Derivative liabilities	537	5,778
Total liabilities	590,792	633,678
Mezzanine equity	90,726	83,313
Stockholders' equity (deficit)	(265,805)	(202,819)
Total liabilities, mezzanine equity and stockholders' deficit	415,713	514,172
Guarantor Parent Company
Assets
Current assets	(1,575)	971
Property and equipment, net	12,346	16,666
Investment in subsidiaries	197,931	197,931
Intercompany accounts	(3,410)	23,454
Other non-current assets	863	1,079
Total assets	206,155	240,101
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	14,491	48,482
Deferred income taxes and other non-current liabilities	37,736	30,458
Derivative liabilities	537	5,778
Total liabilities	52,764	84,718
Mezzanine equity	90,726	83,313
Stockholders' equity (deficit)	62,665	72,070
Total liabilities, mezzanine equity and stockholders' deficit	206,155	240,101
Issuer Subsidiary
Assets
Investment in subsidiaries	377,362	377,362
Intercompany accounts	61,084	80,834
Other non-current assets	9,845	11,908
Total assets	448,291	470,104
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	8,764	1,565
Long-term debt and capital lease obligations, net of current portion	347,473	346,615
Total liabilities	356,237	348,180
Stockholders' equity (deficit)	92,054	121,924
Total liabilities, mezzanine equity and stockholders' deficit	448,291	470,104
Guarantor Subsidiaries
Assets
Current assets	112,620	134,119
Property and equipment, net	138,539	174,564
Investment in subsidiaries	44,118	44,118
Intercompany accounts	61,889	12,845
Other non-current assets	32,015	42,572
Total assets	389,181	408,218
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	76,616	78,914
Long-term debt and capital lease obligations, net of current portion	366
Deferred income taxes and other non-current liabilities	33,916	30,798
Total liabilities	110,898	109,712
Stockholders' equity (deficit)	278,283	298,506
Total liabilities, mezzanine equity and stockholders' deficit	389,181	408,218
Non-Guarantor Subsidiaries
Assets
Current assets	86,943	103,310
Property and equipment, net	16,477	21,406
Investment in subsidiaries	14,206	14,206
Intercompany accounts	(119,563)	(117,133)
Other non-current assets	7,817	7,754
Total assets	5,880	29,543
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	67,941	86,362
Long-term debt and capital lease obligations, net of current portion	1,807	3,568
Deferred income taxes and other non-current liabilities	1,145	1,138
Total liabilities	70,893	91,068
Stockholders' equity (deficit)	(65,013)	(61,525)
Total liabilities, mezzanine equity and stockholders' deficit	5,880	29,543
Eliminations
Assets
Investment in subsidiaries	(633,617)	(633,617)
Other non-current assets	(177)	(177)
Total assets	(633,794)	(633,794)
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Stockholders' equity (deficit)	(633,794)	(633,794)
Total liabilities, mezzanine equity and stockholders' deficit	$ (633,794)	$ (633,794)