Valuation of Business Acquired (Balance of and Changes in VOBA) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
PresentValueOfFutureInsuranceProfitsAbstract
Balance, beginning of year	$ 29,010		$ 32,497		$ 52,596
Amortization - Impact of assumption and experience Unlocking And Trueups	21,931	[1]	(1,489)	[1]	(1,494)	[1]
Amortization- All Other	(13,871)	[1]	(15,967)	[1]	(10,295)	[1]
Change in Unrealized Investment Gains Losses	3,943		11,681		(11,275)
PresentValueOfFutureInsuranceProfitsInterestAccrued	2,077	[2]	2,288	[2]	2,965	[2]
Balance, end of year	$ 43,090		$ 29,010		$ 32,497
Weighted Average Remaining Life VOBA	5 years 0 months 0 days
Interest Accrual Rate VOBA	6.18%		4.81%		4.97%

[1] The weighted average remaining expected life of VOBA was approximately 5.06 years from the date of acquisition.

[2] The interest accrual rate for the VOBA related to the businesses acquired was 6.18%, 4.81% and 4.97% for years ended December 31, 2012, 2011 and 2010.