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Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost, Due in one year or less $ 4,316
Amortized Cost, Due after one year through five years 15,296
Amortized Cost, Due after five years through ten years 346
Amortized Cost, Total 19,958
Fair Value, Due in one year or less 4,354
Fair Value, Due after one year through five years 15,286
Fair Value, Due after five years through ten years 349
Fair Value, Total $ 19,989