Investments (Net Unrealized Investment Gains and Losses on Fixed Maturity Securities on which an OTTI loss) (Details) (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) Pre Tax [Member] Securities Related to Other Than Temporary Impairments [Member]	Sep. 30, 2013 Deferred Costs Policy Acquisition And Sales Inducements And Valuation Of Business Acquired, Pre Tax [Member] Securities Related to Other Than Temporary Impairments [Member]	Sep. 30, 2013 Deferred Income Tax Liability Benefit [Member] Securities Related to Other Than Temporary Impairments [Member]	Sep. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member] Securities Related to Other Than Temporary Impairments [Member]
Balance	$ 79,544	$ 147,287	$ 545	$ (214)	$ (100)	$ 231
Net investment gains (losses) on investments arising during the period			545	0	(191)	354
Reclassification adjustment for (gains) losses included in net income			(731)	0	256	(475)
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs			0	85	(30)	55
Balance	$ 79,544	$ 147,287	$ 359	$ (129)	$ (65)	$ 165