Investments (All Other Net Unrealized Investment Gains and Losses in AOCI) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	$ 84,622
Balance, ending	62,550
Other Net Unrealized Investment Gains and Losses | Net Unrealized Gains (Losses) on Investments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	198,922
Net investment gains (losses) on investments arising during the period	(49,369)
Reclassification adjustment for (gains) losses included in net income	(4,672)
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	0
Balance, ending	144,881
Other Net Unrealized Investment Gains and Losses | Deferred Policy Acquisition Costs and Other Costs
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	(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 and other costs	17,922
Impact of net unrealized investment (gains) losses on future policy benefits	0
Balance, ending	(41,123)
Other Net Unrealized Investment Gains and Losses | Future Policy Benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	(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 and other costs	0
Impact of net unrealized investment (gains) losses on future policy benefits	2,192
Balance, ending	(6,180)
Other Net Unrealized Investment Gains and Losses | Deferred Income Tax (Liability) Benefit
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	(46,870)
Net investment gains (losses) on investments arising during the period	17,280
Reclassification adjustment for (gains) losses included in net income	1,635
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs and other costs	(6,273)
Impact of net unrealized investment (gains) losses on future policy benefits	(767)
Balance, ending	(34,995)
Other Net Unrealized Investment Gains and Losses | Accumulated Other Comprehensive Income (Loss) Related to Net Unrealized Investment Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	84,635
Net investment gains (losses) on investments arising during the period	(32,089)
Reclassification adjustment for (gains) losses included in net income	(3,037)
Impact of net unrealized investment (gains) losses on deferred policy acquisition costs and other costs	11,649
Impact of net unrealized investment (gains) losses on future policy benefits	1,425
Balance, ending	$ 62,583