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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2016	Sep. 30, 2011
Tax Credit Carryforward [Line Items]
Income Tax Examination, Penalties and Interest Accrued		$ 3,650,000
NOL allocated amount	$ 4,325,337
Operating tax carryforward expiration year start	2029
Operating tax carryforward expiration year end	2036
Percentage Of Notional Federal Tax Liability		25.00%
AFG [Member]
Tax Credit Carryforward [Line Items]
NOL allocated amount	$ 1,383,898
U. S. Federal Net Operating Tax [Member]
Tax Credit Carryforward [Line Items]
NOL allocated amount	4,240,105
United States [Member]
Tax Credit Carryforward [Line Items]
NOL allocated amount	85,232
United Kingdom [Member]
Tax Credit Carryforward [Line Items]
NOL allocated amount	$ 0

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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