Fair Value Measurements - Schedule of Valuation Method for Material Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Embedded Derivative - GMWB $ (2,538)
Mortality 80.00%
Lapse, low end 0.00%
Lapse, high end 16.00%
Minimum
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Benefit Utilization 0.00%
Nonperformance Risk 0.63%
Maximum
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Benefit Utilization 80.00%
Nonperformance Risk 1.23%