Income Taxes - Schedule of Differences Between Income Taxes Expected and Reported Income Tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Income Tax Reconciliation [Line Items]
Expected income tax (benefit) expense at Federal statutory rate	$ 8,885	$ 20,277	$ (46,309)
Valuation allowance for deferred tax assets	(142,126)	72,335	92,673
Preferred stock equity conversion feature	54,810	(9,486)
Residual tax on foreign earnings	29,844	18,943	6,609
Foreign rate differential	(14,115)	(12,650)	(9,601)
Bargain purchase gain		(55,419)
Gain on contingent purchase price reduction	(14,350)
Permanent items	9,544	10,657	4,829
Exempt foreign income	(5,760)	(380)	(9)
Unrecognized tax benefits	(4,386)	(2,793)	3,234
State and local income taxes	(8,539)	1,235	(4,975)
Dividends received deduction	(965)
Inflationary adjustments	(803)	(1,472)	3,409
Capitalized transaction costs	343	2,800
Deferred tax correction of immaterial prior period error		4,873	5,900
Reorganization items			8,678
Other	2,336	1,635	(1,243)
Income tax (benefit) expense	$ (85,282)	$ 50,555	$ 63,195
Effective tax rate	(335.90%)	87.30%	(47.80%)

Income Tax Reconciliation Bargain Purchase Gain On Acquisition

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Income Tax Reconciliation Book Tax Differences On Gains Losses From Capital Transactions

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Income Tax Reconciliation Deferred Tax Correction

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Income Tax Reconciliation Domestic Taxes On Foreign Earnings

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Income Tax Reconciliation Income Tax Expense Benefit For Permanent Items

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Income Tax Reconciliation Inflationary Adjustments

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Income Tax Reconciliation, Nondeductible Expense, Related To Preferred Stock

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Income Tax Reconciliation Reorganization Related And Other Tax Adjustments

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Income Tax Reconciliation Unrecognized Tax Benefits

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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-Glossary Income Tax Expense (or Benefit)

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the deduction for dividends paid or received under enacted tax laws.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to total foreign income tax expense or benefit. The foreign income tax expense or benefit difference represents the income tax expense or benefit at applicable domestic statutory income tax rates applied to foreign earnings or loss for the period versus the foreign income tax expense or benefit calculated by applying the appropriate foreign tax rates.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the year/accounting period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to all other items not otherwise listed in the existing taxonomy.

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The sum of the differences between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in all income tax contingencies, whether recorded or adjusted, during the period.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to income that is exempt from income taxes under enacted tax laws.

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