Investments (All Other Net Unrealized Investment Gains and Losses in AOCI) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Balance		$ 84,622
Balance	92,989	84,622
Other Net Unrealized Investment Gains and Losses [Member] | Accumulated Net Unrealized Investment Gain (Loss) Pre Tax [Member]
Balance	198,922
Net investment gains (losses) on investments arising during the period	16,209
Reclassification adjustment for (gains) losses included in net income	(1,869)
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs	0
Impact of net unrealized investment (gains) losses on policyholders' account balance	0
Balance	213,262
Other Net Unrealized Investment Gains and Losses [Member] | Deferred Costs Policy Acquisition And Sales Inducements And Valuation Of Business Acquired, Pre Tax [Member]
Balance	(59,045)
Net investment gains (losses) on investments arising during the period	0
Reclassification adjustment for (gains) losses included in net income	0
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs	(756)
Impact of net unrealized investment (gains) losses on policyholders' account balance	0
Balance	(59,801)
Other Net Unrealized Investment Gains and Losses [Member] | Policyholders Account Balances Pre Tax [Member]
Balance	(8,372)
Net investment gains (losses) on investments arising during the period	0
Reclassification adjustment for (gains) losses included in net income	0
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs	0
Impact of net unrealized investment (gains) losses on policyholders' account balance	(652)
Balance	(9,024)
Other Net Unrealized Investment Gains and Losses [Member] | Deferred Income Tax Liability Benefit [Member]
Balance	(46,870)
Net investment gains (losses) on investments arising during the period	(5,673)
Reclassification adjustment for (gains) losses included in net income	654
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs	265
Impact of net unrealized investment (gains) losses on policyholders' account balance	227
Balance	(51,397)
Other Net Unrealized Investment Gains and Losses [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Balance	84,635
Net investment gains (losses) on investments arising during the period	10,536
Reclassification adjustment for (gains) losses included in net income	(1,215)
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs	(491)
Impact of net unrealized investment (gains) losses on policyholders' account balance	(425)
Balance	$ 93,040