Fair Value Measurements (Details 1) - Embedded derivatives [Member]	3 Months Ended
	Mar. 31, 2016
Unobservable inputs used by management in determining fair value of embedded derivatives
Risk margin for uncertainty in cash flows	0.58%
Minimum [Member]
Unobservable inputs used by management in determining fair value of embedded derivatives
Adjustment for insurance subsidiary's credit risk	0.20%
Surrenders	3.00%
Partial surrenders	2.00%
Annuitizations	0.25%
Deaths	1.50%
Budgeted option costs	1.75%
Maximum [Member]
Unobservable inputs used by management in determining fair value of embedded derivatives
Adjustment for insurance subsidiary's credit risk	3.20%
Surrenders	21.00%
Partial surrenders	10.00%
Annuitizations	1.00%
Deaths	4.00%
Budgeted option costs	3.50%