Investments (Other Than Temporary Impairments by Asset Type) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2016 USD ($) Securities	Mar. 31, 2015 USD ($) Securities
Other than Temporary Impairment Losses, Investments [Abstract]
Other than temporary impairment, number of securities \| Securities	11
Total OTTI losses	$ (6,018)	$ (132)
Portion of OTTI losses recognized in (from) other comprehensive income	324	0
Net OTTI losses recognized in operations	$ (5,694)	$ (132)
Corporate Securities [Member] \| Energy [Member]
Other than Temporary Impairment Losses, Investments [Abstract]
Other than temporary impairment, number of securities \| Securities	2
Total OTTI losses	$ (642)
Portion of OTTI losses recognized in (from) other comprehensive income	0
Net OTTI losses recognized in operations	$ (642)
Corporate Securities [Member] \| Telecommunications [Member]
Other than Temporary Impairment Losses, Investments [Abstract]
Other than temporary impairment, number of securities \| Securities	1
Total OTTI losses	$ (4,462)
Portion of OTTI losses recognized in (from) other comprehensive income	562
Net OTTI losses recognized in operations	$ (3,900)
Corporate Securities [Member] \| Utilities [Member]
Other than Temporary Impairment Losses, Investments [Abstract]
Other than temporary impairment, number of securities \| Securities	1
Total OTTI losses	$ (136)
Portion of OTTI losses recognized in (from) other comprehensive income	0
Net OTTI losses recognized in operations	$ (136)
Residential Mortgage Backed Securities [Member]
Other than Temporary Impairment Losses, Investments [Abstract]
Other than temporary impairment, number of securities \| Securities	4	1
Total OTTI losses	$ 0	$ (132)
Portion of OTTI losses recognized in (from) other comprehensive income	(238)	0
Net OTTI losses recognized in operations	$ (238)	$ (132)
Commercial Mortgage Backed Securities [Member]
Other than Temporary Impairment Losses, Investments [Abstract]
Other than temporary impairment, number of securities \| Securities	3
Total OTTI losses	$ (778)
Portion of OTTI losses recognized in (from) other comprehensive income	0
Net OTTI losses recognized in operations	$ (778)

Item represents the number of securites for which other than temporary impairment was recognized.

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- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e25351-111560

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- References

No definition available.

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- Definition

Amount before tax of other than temporary impairment loss (OTTI) on investments in available-for-sale and held-to-maturity debt securities, recognized in other comprehensive loss and attributable to parent entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e25362-111560

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 34D
-URI http://asc.fasb.org/extlink&oid=27723805&loc=SL6284304-111560

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

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- Definition

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 8B
-URI http://asc.fasb.org/extlink&oid=27724398&loc=SL6284393-111563

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