Summary of Significant Accounting Policies (Details 5) - Guaranteed Minimum Death Benefit [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary Of Guaranteed Minimum Death Benefit [Abstract]
GMDB reserve	$ 358	$ 278
Aggregate in-the-money death benefits under the GMDB provision	$ 35,563	$ 29,866
Variable annuity contract value distribution based on GMDB feature:
No guarantee	32.00%	31.00%
Return of premium guarantee	62.00%	63.00%
Guarantee of premium roll-up at an annual rate of 3% or 5%	6.00%	6.00%
Total	100.00%	100.00%