Investments (All Other Net Unrealized Investment Gains and Losses in AOCI) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	$ 178,691
Balance	95,100
Other Net Unrealized Investment Gains and Losses | Net Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	344,577
Net investment gains (losses) on investments arising during the period	(163,171)
Reclassification adjustment for (gains) losses included in net income	(3,894)
Reclassification adjustment for OTTI losses excluded from net income	(7)
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs and other costs	0
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	0
Balance	177,505
Other Net Unrealized Investment Gains and Losses | Deferred Policy Acquisition Costs and Other Costs
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(112,829)
Net investment gains (losses) on investments arising during the period	0
Reclassification adjustment for (gains) losses included in net income	0
Reclassification adjustment for OTTI losses excluded from net income	0
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs and other costs	68,898
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	0
Balance	(43,931)
Other Net Unrealized Investment Gains and Losses | Future Policy Benefits and Policyholders’ Account Balances
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	39,122
Net investment gains (losses) on investments arising during the period	0
Reclassification adjustment for (gains) losses included in net income	0
Reclassification adjustment for OTTI losses excluded from net income	0
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs and other costs	0
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	(30,084)
Balance	9,038
Other Net Unrealized Investment Gains and Losses | Deferred Income Tax (Liability) Benefit
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(94,695)
Net investment gains (losses) on investments arising during the period	56,909
Reclassification adjustment for (gains) losses included in net income	1,363
Reclassification adjustment for OTTI losses excluded from net income	2
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs and other costs	(24,114)
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	10,529
Balance	(50,006)
Other Net Unrealized Investment Gains and Losses | Total net unrealized investment gains (losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	176,175
Net investment gains (losses) on investments arising during the period	(106,262)
Reclassification adjustment for (gains) losses included in net income	(2,531)
Reclassification adjustment for OTTI losses excluded from net income	(5)
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs and other costs	44,784
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	(19,555)
Balance	$ 92,606