Unaudited Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	4 Months Ended	5 Months Ended	9 Months Ended	12 Months Ended
	May 04, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating activities:
Net (loss) income	$ (21,496)	$ (1,515)	$ (7,086)	$ (19,731)	$ (57,332)	$ (58,392)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	16,469	19,545
Bad debt expense	26	116
Amortization of debt fair value		(2,078)
Non-cash employee compensation and professional fees expense	3,348	1,120
Loss on disposition of assets	47	151	1,368
Equity in (income) loss of affiliates	(559)	(260)	(552)	13	648	2,432
Deferred tax benefit	73	163	159	208	(94)	47
Changes in operating assets and liabilities	3,770	(1,318)
Net cash (used in) provided by operating activities	1,678	16,444
Investing activities:
Capital expenditures for property and equipment	(2,237)	(6,168)
Investment in development	(75)	(43)
Proceeds from sale of assets	3
Increase in restricted cash	(3,464)	(488)
Net cash used in investing activities	(5,773)	(6,699)
Financing activities:
Principal payments on debt	(1,777)	(3,021)
Payment of loan costs	(120)	(59)
Member contributions		1,091
Advances from consolidating entities, net	0	0
Net cash (used in) provided by financing activities	(1,897)	(1,989)
Net (decrease) increase in cash and cash equivalents	(5,992)	7,756
Cash and cash equivalents, beginning of period	33,767	27,775
Cash and cash equivalents, end of period	27,775	35,531		33,767
Predecessor [Member]
Operating activities:
Net (loss) income		(1,515)	(7,086)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization			41,463
Bad debt expense			38
Non-cash employee compensation and professional fees expense			1,638
Loss on disposition of assets		151	1,368
Gain on disposition of property included in discontinued operations			(6,667)
Equity in (income) loss of affiliates		264	653
Deferred tax benefit			159
Changes in operating assets and liabilities			(2,991)
Net cash (used in) provided by operating activities			27,269
Investing activities:
Capital expenditures for property and equipment			(7,720)
Loan repayment from unconsolidated affiliates			807
Investment in development			(316)
Proceeds from sale of a discontinued operation			4,200
Proceeds from sale of assets			2
Increase in restricted cash			(1,910)
Net cash used in investing activities			(4,937)
Financing activities:
Principal payments on debt			(79,239)
Proceeds from issuance of long-term debt			56,000
Payment of loan costs			(1,549)
Net cash (used in) provided by financing activities			(24,788)
Net (decrease) increase in cash and cash equivalents			(2,456)
Cash and cash equivalents, beginning of period			36,988	36,988
Cash and cash equivalents, end of period			34,532
Parent [Member]
Operating activities:
Net (loss) income	(21,481)	(1,490)	(7,072)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	53	1
Bad debt expense	0	0
Amortization of debt fair value		(7)
Non-cash employee compensation and professional fees expense	0	0
Loss on disposition of assets	0	0	0
Equity in (income) loss of affiliates	3,978	5,897	564
Deferred tax benefit	73	163
Changes in operating assets and liabilities	14,315	69,599
Net cash (used in) provided by operating activities	(3,062)	62,369
Investing activities:
Capital expenditures for property and equipment	0	0
Investment in development	0	0
Proceeds from sale of assets	0
Increase in restricted cash	0	0
Net cash used in investing activities	0	0
Financing activities:
Principal payments on debt	0	0
Payment of loan costs	3	(4)
Member contributions		1,091
Advances from consolidating entities, net	16,360	(76,215)
Net cash (used in) provided by financing activities	16,363	(75,128)
Net (decrease) increase in cash and cash equivalents	13,301	(12,759)
Cash and cash equivalents, beginning of period	10,039	23,340
Cash and cash equivalents, end of period	23,340	10,581
Parent [Member] | Predecessor [Member]
Operating activities:
Net (loss) income		(1,490)	(7,072)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization			115
Loss on disposition of assets		0
Equity in (income) loss of affiliates		(5,897)	(564)
Deferred tax benefit			159
Changes in operating assets and liabilities			(662)
Net cash (used in) provided by operating activities			(6,896)
Investing activities:
Increase in restricted cash			(1,001)
Net cash used in investing activities			(1,001)
Financing activities:
Payment of loan costs			(107)
Advances from consolidating entities, net			8,004
Net cash (used in) provided by financing activities			7,897
Cash and cash equivalents, beginning of period			10,047	10,047
Cash and cash equivalents, end of period			10,047
Issuer [Member]
Operating activities:
Net (loss) income	(3,978)	5,897	(564)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	480	2
Bad debt expense	0	0
Amortization of debt fair value		(2,222)
Non-cash employee compensation and professional fees expense	0	0
Loss on disposition of assets	0	0	0
Equity in (income) loss of affiliates	(5,690)	14,073	(20,464)
Deferred tax benefit	0	0
Changes in operating assets and liabilities	(3,747)	144,101
Net cash (used in) provided by operating activities	(12,935)	133,705
Investing activities:
Capital expenditures for property and equipment	0	0
Investment in development	0	0
Proceeds from sale of assets	0
Increase in restricted cash	0	0
Net cash used in investing activities	0	0
Financing activities:
Principal payments on debt	527	0
Payment of loan costs	(121)	(3)
Member contributions		0
Advances from consolidating entities, net	458	(118,066)
Net cash (used in) provided by financing activities	864	(118,069)
Net (decrease) increase in cash and cash equivalents	(12,071)	15,636
Cash and cash equivalents, beginning of period	15,980	3,909
Cash and cash equivalents, end of period	3,909	19,545
Issuer [Member] | Predecessor [Member]
Operating activities:
Net (loss) income		5,897	(564)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization			1,021
Loss on disposition of assets		0
Equity in (income) loss of affiliates		(14,073)	20,464
Changes in operating assets and liabilities			5,577
Net cash (used in) provided by operating activities			(14,430)
Financing activities:
Principal payments on debt			1,149
Payment of loan costs			(122)
Advances from consolidating entities, net			10,450
Net cash (used in) provided by financing activities			11,477
Net (decrease) increase in cash and cash equivalents			(2,953)
Cash and cash equivalents, beginning of period			24,168	24,168
Cash and cash equivalents, end of period			21,215
Subsidiary Guarantor [Member]
Operating activities:
Net (loss) income	3,787	14,474	19,263
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	8,391	9,615
Bad debt expense	1	18
Amortization of debt fair value		0
Non-cash employee compensation and professional fees expense	3,348	1,120
Loss on disposition of assets	47	0	21
Equity in (income) loss of affiliates	0	0	0
Deferred tax benefit	0	0
Changes in operating assets and liabilities	(3,218)	(66,859)
Net cash (used in) provided by operating activities	12,356	(41,632)
Investing activities:
Capital expenditures for property and equipment	(1,248)	(2,826)
Investment in development	(75)	(43)
Proceeds from sale of assets	3
Increase in restricted cash	0	0
Net cash used in investing activities	(1,320)	(2,869)
Financing activities:
Principal payments on debt	(14)	0
Payment of loan costs	0	0
Member contributions		0
Advances from consolidating entities, net	(15,777)	47,284
Net cash (used in) provided by financing activities	(15,791)	47,284
Net (decrease) increase in cash and cash equivalents	(4,755)	2,783
Cash and cash equivalents, beginning of period	814	(3,941)
Cash and cash equivalents, end of period	(3,941)	(1,158)
Subsidiary Guarantor [Member] | Predecessor [Member]
Operating activities:
Net (loss) income		14,474	19,263
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization			19,157
Bad debt expense			3
Non-cash employee compensation and professional fees expense			1,638
Loss on disposition of assets		0	21
Equity in (income) loss of affiliates		0
Changes in operating assets and liabilities			(2,339)
Net cash (used in) provided by operating activities			37,743
Investing activities:
Capital expenditures for property and equipment			(2,883)
Investment in development			(316)
Net cash used in investing activities			(3,199)
Financing activities:
Principal payments on debt			(24)
Advances from consolidating entities, net			(35,773)
Net cash (used in) provided by financing activities			(35,797)
Net (decrease) increase in cash and cash equivalents			(1,253)
Cash and cash equivalents, beginning of period			(328)	(328)
Cash and cash equivalents, end of period			(1,581)
Non-Guarantor Subsidiaries [Member]
Operating activities:
Net (loss) income	1,888	(426)	1,187
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	7,545	9,927
Bad debt expense	25	98
Amortization of debt fair value		151
Non-cash employee compensation and professional fees expense	0	0
Loss on disposition of assets	0	151	1,347
Equity in (income) loss of affiliates	(559)	(409)	(552)
Deferred tax benefit	0	0
Changes in operating assets and liabilities	(3,580)	(148,308)
Net cash (used in) provided by operating activities	5,319	(137,998)
Investing activities:
Capital expenditures for property and equipment	(989)	(3,342)
Investment in development	0	0
Proceeds from sale of assets	0
Increase in restricted cash	(3,464)	(488)
Net cash used in investing activities	(4,453)	(3,830)
Financing activities:
Principal payments on debt	(2,290)	(3,021)
Payment of loan costs	(2)	(52)
Member contributions		0
Advances from consolidating entities, net	(1,041)	146,997
Net cash (used in) provided by financing activities	(3,333)	143,924
Net (decrease) increase in cash and cash equivalents	(2,467)	2,096
Cash and cash equivalents, beginning of period	6,934	4,467
Cash and cash equivalents, end of period	4,467	6,563
Non-Guarantor Subsidiaries [Member] | Predecessor [Member]
Operating activities:
Net (loss) income		(426)	1,187
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization			21,170
Bad debt expense			35
Loss on disposition of assets		151	1,347
Gain on disposition of property included in discontinued operations			(6,667)
Equity in (income) loss of affiliates		264	653
Changes in operating assets and liabilities			(5,567)
Net cash (used in) provided by operating activities			10,852
Investing activities:
Capital expenditures for property and equipment			(4,837)
Loan repayment from unconsolidated affiliates			807
Proceeds from sale of a discontinued operation			4,200
Proceeds from sale of assets			2
Increase in restricted cash			(909)
Net cash used in investing activities			(737)
Financing activities:
Principal payments on debt			(80,364)
Proceeds from issuance of long-term debt			56,000
Payment of loan costs			(1,320)
Advances from consolidating entities, net			17,319
Net cash (used in) provided by financing activities			(8,365)
Net (decrease) increase in cash and cash equivalents			1,750
Cash and cash equivalents, beginning of period			3,101	3,101
Cash and cash equivalents, end of period			4,851
Consolidation Adjustments [Member]
Operating activities:
Net (loss) income	(1,712)	(19,970)	(19,900)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	0	0
Bad debt expense	0	0
Amortization of debt fair value		0
Non-cash employee compensation and professional fees expense	0	0
Loss on disposition of assets	0	0	0
Equity in (income) loss of affiliates	1,712	(19,821)	19,900
Deferred tax benefit	0	0
Changes in operating assets and liabilities	0	149
Net cash (used in) provided by operating activities	0	0
Investing activities:
Capital expenditures for property and equipment	0	0
Investment in development	0	0
Proceeds from sale of assets	0
Increase in restricted cash	0	0
Net cash used in investing activities	0	0
Financing activities:
Principal payments on debt	0	0
Payment of loan costs	0	0
Member contributions		0
Advances from consolidating entities, net	0	0
Net cash (used in) provided by financing activities	0	0
Net (decrease) increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Consolidation Adjustments [Member] | Predecessor [Member]
Operating activities:
Net (loss) income		(19,970)	(19,900)
Adjustment to reconcile net (loss) income to net cash (used in) provided by operating activities:
Loss on disposition of assets		0
Equity in (income) loss of affiliates		$ 19,970	$ (19,900)