Condensed Consolidating Financial Information (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Assets
Current assets	$ 172,311	$ 238,400
Property and equipment, net	186,718	212,636
Other non-current assets	51,817	63,136
Total assets	410,846	514,172	678,626
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	160,602	215,323
Long-term debt and capital lease obligations, net of current portion	350,168	350,183
Deferred income taxes and other non-current liabilities	69,125	62,394
Derivative liabilities	201	5,778
Total liabilities	580,096	633,678
Mezzanine equity	88,194	83,313
Stockholders' equity (deficit)	(257,444)	(202,819)
Total liabilities, mezzanine equity and stockholders' deficit	410,846	514,172
Guarantor Parent Company
Assets
Current assets	(879)	971
Property and equipment, net	13,705	16,666
Investment in subsidiaries	197,932	197,931
Intercompany accounts	(6,126)	23,454
Other non-current assets	918	1,079
Total assets	205,550	240,101
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	16,238	48,482
Deferred income taxes and other non-current liabilities	35,182	30,458
Derivative liabilities	201	5,778
Total liabilities	51,621	84,718
Mezzanine equity	88,194	83,313
Stockholders' equity (deficit)	65,735	72,070
Total liabilities, mezzanine equity and stockholders' deficit	205,550	240,101
Issuer Subsidiary
Assets
Investment in subsidiaries	377,362	377,362
Intercompany accounts	59,804	80,834
Other non-current assets	13,849	11,908
Total assets	451,015	470,104
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	1,795	1,565
Long-term debt and capital lease obligations, net of current portion	347,187	346,615
Total liabilities	348,982	348,180
Stockholders' equity (deficit)	102,033	121,924
Total liabilities, mezzanine equity and stockholders' deficit	451,015	470,104
Guarantor Subsidiaries
Assets
Current assets	100,288	134,119
Property and equipment, net	154,634	174,564
Investment in subsidiaries	44,118	44,118
Intercompany accounts	72,976	12,845
Other non-current assets	29,331	42,572
Total assets	401,347	408,218
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	76,641	78,914
Long-term debt and capital lease obligations, net of current portion	448
Deferred income taxes and other non-current liabilities	32,805	30,798
Total liabilities	109,894	109,712
Stockholders' equity (deficit)	291,453	298,506
Total liabilities, mezzanine equity and stockholders' deficit	401,347	408,218
Non-Guarantor Subsidiaries
Assets
Current assets	72,902	103,310
Property and equipment, net	18,379	21,406
Investment in subsidiaries	14,206	14,206
Intercompany accounts	(126,654)	(117,133)
Other non-current assets	7,896	7,754
Total assets	(13,271)	29,543
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Current liabilities	65,928	86,362
Long-term debt and capital lease obligations, net of current portion	2,533	3,568
Deferred income taxes and other non-current liabilities	1,138	1,138
Total liabilities	69,599	91,068
Stockholders' equity (deficit)	(82,870)	(61,525)
Total liabilities, mezzanine equity and stockholders' deficit	(13,271)	29,543
Eliminations
Assets
Investment in subsidiaries	(633,618)	(633,617)
Other non-current assets	(177)	(177)
Total assets	(633,795)	(633,794)
Liabilities, Mezzanine and Stockholders' Equity (Deficit)
Stockholders' equity (deficit)	(633,795)	(633,794)
Total liabilities, mezzanine equity and stockholders' deficit	$ (633,795)	$ (633,794)