Summary of Significant Accounting Policies (Details 4) (Guaranteed Minimum Death Benefit [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Guaranteed Minimum Death Benefit [Member]
Summary of guaranteed minimum death benefit
GMDB reserve	$ 209	$ 392
Aggregate in-the-money death benefits under the GMDB provision	$ 30,422	$ 41,990
Variable annuity contract value distribution based on GMDB feature:
No guarantee	30.00%	31.00%
Return of premium guarantee	64.00%	63.00%
Guarantee of premium roll-up at an annual rate of 3% or 5%	6.00%	6.00%
Total	100.00%	100.00%