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Commitments and Contingencies - Additional Information (Detail) (USD $)
 1 Months Ended 12 Months Ended
Jul. 31, 2012
Sep. 30, 2014
Apr. 06, 2011
Commitment And Contingencies [Line Items]      
Reserves for legal, environmental and regulatory matters   $ 22,800,000  
Notional amount of unfunded, legally binding lending commitments   154,500,000  
Expiration of partial amount of unfunded, legally binding lending commitments   53,500,000  
Maximum
      
Commitment And Contingencies [Line Items]      
Estimated range of external legal costs   3,000,000  
Expiry date of partial amount of notional amount   1 year  
Expiry date of remainder part of notional amount   5 years  
Minimum
      
Commitment And Contingencies [Line Items]      
Estimated range of external legal costs   1,000,000  
Expiry date of remainder part of notional amount   1 year  
FGLH
      
Commitment And Contingencies [Line Items]      
Business Acquisition Fair Value Of Contingent Purchase Price Consideration Reduction     0
Accrued amount of guaranty fund assessments   4,400,000  
Estimated future premium tax deductions   4,600,000  
Pre-tax charge, net of reinsurance, to increase reserves to cover potential benefits payable 11,000,000    
Administrative costs and potential liabilities   2,000,000  
Spectrum Brands
      
Commitment And Contingencies [Line Items]      
Environmental costs recognized, capitalized   4,600,000  
OMGUK CARVM financing fee [Member]
      
Commitment And Contingencies [Line Items]      
Reserves for legal, environmental and regulatory matters   0  
Cressy Plaintiff [Member]
      
Commitment And Contingencies [Line Items]      
Litigation Settlement, Amount   0  
Loss Contingency Accrual, Provision   0  
Estimated Litigation Liability   0  
Loss Contingency, Receivable   0  
Unasserted Claim [Member] | FGLH
      
Commitment And Contingencies [Line Items]      
Loss Contingency Accrual, Payments   $ 0.8