Consolidated Statements of Permanent Equity (Deficit) and Comprehensive Income (Loss) (USD $) In Thousands, except Share data	Total	Successor	Successor Common Stock	Successor Additional Paid-in Capital	Successor Accumulated Deficit	Successor Accumulated Other Comprehensive Income (Loss) (Note 14)	Successor Treasury Stock	Successor Total Stockholder's Equity (Deficit)	Successor Noncontrolling Interest	Predecessor	Predecessor Common Stock	Predecessor Additional Paid-in Capital	Predecessor Accumulated Deficit	Predecessor Accumulated Other Comprehensive Income (Loss) (Note 14)	Predecessor Treasury Stock	Predecessor Total Stockholder's Equity (Deficit)
Beginning balance at Sep. 30, 2008										$ (1,027,238)	$ 692	$ 674,370	$ (1,694,915)	$ 69,445	$ (76,830)	$ (1,027,238)
Beginning balance, shares at Sep. 30, 2008											52,775
Net income (loss)										1,013,941			1,013,941			1,013,941
Other unrealized gains and losses										9,817				9,817		9,817
Actuarial adjustments to pension plans (Note 15)										(1,160)				(1,160)		(1,160)
Adjustment to reverse the tax effects recorded in AOCI elements where a deferred tax valuation allowance exists on the corresponding assets and liabilities										5,104				5,104		5,104
Translation adjustment										(2,650)				(2,650)		(2,650)
Comprehensive income (loss)										1,025,052						1,025,052
Issuance of restricted stock, value											(1)	1
Issuance of restricted stock, shares											230
Forfeiture of restricted stock											(82)
Treasury stock purchases, value										(61)					(61)	(61)
Treasury stock purchases, shares											(185)
Stock compensation (Note 3 and 16)										2,636		2,636				2,636
Cancellation of the value of the predecessor company common stock pursuant to the company's plan of reorganization										(600,807)	(691)	(677,007)			76,891	(600,807)
Cancellation of the shares of the predecessor company common stock pursuant to the company's plan of reorganization											(52,738)
Elimination of predecessor company accumulated deficit and accumulated other comprehensive income upon emergence from the company's plan of reorganization										600,418			680,974	(80,556)		600,418
Issuance of new common stock in connection with the company's emergence from its plan of reorganization										725,096	1,296	723,800				725,096
Issuance of new common stock shares in connection with the company's emergence from its plan of reorganization											129,600
Ending balance at Aug. 30, 2009		725,096	1,296	723,800				725,096
Ending balance, shares at Aug. 30, 2009			129,600
Net income (loss)		(70,785)			(70,785)			(70,785)
Other unrealized gains and losses		851				851		851
Actuarial adjustments to pension plans (Note 15)		576				576		576
Adjustment to reverse the tax effects recorded in AOCI elements where a deferred tax valuation allowance exists on the corresponding assets and liabilities		(755)				(755)		(755)
Translation adjustment		5,896				5,896		5,896
Comprehensive income (loss)		(64,217)						(64,217)
Ending balance at Sep. 30, 2009		660,879	1,296	723,800	(70,785)	6,568		660,879
Beginning balance, shares at Sep. 30, 2009			129,600
Net income (loss)		(198,242)			(151,869)			(151,869)	(46,373)
Other unrealized gains and losses		(6,490)				(5,214)		(5,214)	(1,276)
Actuarial adjustments to pension plans (Note 15)		(18,882)				(10,985)		(10,985)	(7,897)
Adjustment to reverse the tax effects recorded in AOCI elements where a deferred tax valuation allowance exists on the corresponding assets and liabilities		(2,398)				(2,423)		(2,423)	25
Translation adjustment		12,596				126		126	12,470
Comprehensive income (loss)		(213,416)						(170,365)	(43,051)
Issuance of common stock in merger, value		575,203	883	574,320				575,203
Issuance of common stock in merger, shares			88,271
Issuance of restricted stock, value			41	(41)
Issuance of restricted stock, shares			4,056
Unvested restricted stock units, not issued or outstanding, value			(12)	12
Unvested restricted stock units, not issued or outstanding, shares			(1,171)
Treasury stock purchases, value		(2,207)					(2,207)	(2,207)
Stock compensation (Note 3 and 16)		16,710		14,032				14,032	2,678
Capital contributions from a principal stockholder		491		491				491
Retrospective adjustments for common control transactions as of June 16, 2010 (Note 1), value		140,167	(816)	(456,847)	72,345	6,733	2,207	(376,378)	516,545
Retrospective adjustments for common control transactions as of June 16, 2010 (Note 1), shares			(81,559)
Ending balance at Sep. 30, 2010	1,177,827	1,177,827	1,392	855,767	(150,309)	(5,195)		701,655	476,172
Ending balance, shares at Sep. 30, 2010			139,197
Net income (loss)		115			34,795			34,795	(34,680)
Unrealized investment gains, net		159,302				159,302		159,302
Non-credit related other-than-temporary impairments		191				191		191
Other unrealized gains and losses		4,759				2,475		2,475	2,284
Actuarial adjustments to pension plans (Note 15)		(5,564)				(3,548)		(3,548)	(2,016)
Adjustment to reverse the tax effects recorded in AOCI elements where a deferred tax valuation allowance exists on the corresponding assets and liabilities		2,706				1,449		1,449	1,257
Translation adjustment		(10,115)				(4,909)		(4,909)	(5,206)
Comprehensive income (loss)		151,394						189,755	(38,361)
Issuance of subsidiary stock, net		23,849		(1,789)		(318)		(2,107)	25,956
Exercise of stock options, value		417	1	416				417
Exercise of stock options, shares			149
Stock compensation (Note 3 and 16)		30,505		16,573				16,573	13,932
Capital contributions from a principal stockholder		1,716		1,716				1,716
Preferred stock dividends and accretion		(19,833)			(19,833)			(19,833)
Ending balance at Sep. 30, 2011	$ 1,365,875	$ 1,365,875	$ 1,393	$ 872,683	$ (135,347)	$ 149,448		$ 888,177	$ 477,698
Ending balance, shares at Sep. 30, 2011			139,346