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Reinsurance - Effect of Reinsurance on Premiums Earned, Benefits Incurred and Reserve Changes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct, Net Premiums Earned	$ 297,964	$ 157,772
Assumed, Net Premiums Earned	47,179	22,858
Ceded, Net Premiums Earned	(289,846)	(141,628)
Net Premiums Earned	55,297	39,002
Direct, Net Benefits Incurred and Reserve Changes	1,033,336	392,073
Assumed, Net Benefits Incurred and Reserve Changes	34,940	19,571
Ceded, Net Benefits Incurred and Reserve Changes	(290,904)	(164,012)
Net Benefits Incurred and Reserve Changes	$ 777,372	$ 247,632

X

- Definition

Premiums earned for all life insurance assumed from other insurers as a result of reinsurance arrangements.

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- Definition

Premiums assumed and earned by another insurer as a result of reinsurance arrangements.

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Premiums earned directly for all life insurance before adding contracts assumed from other insurers or subtracting any amounts assumed by other insurers.

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Premiums recognized as revenue in the period earned on all life insurance and reinsurance contracts after subtracting any amounts ceded to another insurer.

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The amount of the provision for the period for claims and benefits incurred on contract risks assumed from other (ceding) insurers under reinsurance arrangements.

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The reduction in the amount of the provision for the period for claims and benefits incurred on contract risks ceded to other insurers under reinsurance arrangements.

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The net amount of the provision for the period for claims and benefits incurred on contracts directly written, assumed, and ceded.

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The amount of the provision for the period for claims and benefits incurred on contracts acquired by the insurer during the period in other than reinsurance arrangements.

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