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Investments (Cumulative Noncredit Portion of Other Than Temporary Impairment Recognized in Other Comprehensive Income and Change in Fair Value Since Other Than Temporary Impairment) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investment Holdings [Line Items]
Amortized cost	$ 503,432	$ 569,508
OTTI recognized in other comprehensive income	(176,757)	(173,494)
Change in fair value since OTTI was recognized	205,160	215,636
Fair value	531,835	611,650
Fixed Maturity Securities [Member] | Corporate Securities [Member]
Investment Holdings [Line Items]
Amortized cost	0	0
OTTI recognized in other comprehensive income	0	0
Change in fair value since OTTI was recognized	20	11
Fair value	20	11
Fixed Maturity Securities [Member] | Residential Mortgage Backed Securities [Member]
Investment Holdings [Line Items]
Amortized cost	495,278	569,508
OTTI recognized in other comprehensive income	(171,632)	(173,494)
Change in fair value since OTTI was recognized	205,140	215,625
Fair value	528,786	$ 611,639
Fixed Maturity Securities [Member] | Other Asset Backed Securities [Member]
Investment Holdings [Line Items]
Amortized cost	8,154
OTTI recognized in other comprehensive income	(5,125)
Change in fair value since OTTI was recognized	0
Fair value	$ 3,029

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- Definition

Change in Fair Value of Securities with Noncredit Other Than Temporary impairment Losses

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- Definition

Represents the fair value of securities with noncredit other than temporary impairment losses as of the reporting date.

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- Definition

The cummulative amount of other than temporary impairment (OTTI) loss on a debt security, categorized as either Available-for-sale or Held-to-maturity, related to factors other than credit losses when the entity does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis that has been recognized since this accounting standard became effective. This amount which is attributable to the parent, is a portion of the deduction from the total impairment losses of Investments (before taxes) presented on the income statement.

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- Definition

Amortized cost of securities with noncredit OTTI losses recognized during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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