Investments (Net Unrealized Investment Gains and Losses on Fixed Maturity Securities on which an OTTI loss) (Details) (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) Pre Tax [Member] Securities Related to Other Than Temporary Impairments [Member]	Jun. 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]	Jun. 30, 2013 Deferred Income Tax Liability Benefit [Member] Securities Related to Other Than Temporary Impairments [Member]	Jun. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member] Securities Related to Other Than Temporary Impairments [Member]
Balance	$ 81,843	$ 147,287	$ 545	$ (214)	$ (100)	$ 231
Net investment gains (losses) on investments arising during the period			562	0	(197)	365
Reclassification adjustment for (gains) losses included in net income			(762)	0	267	(495)
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs			0	86	(30)	56
Balance	$ 81,843	$ 147,287	$ 345	$ (128)	$ (60)	$ 157