Minimum Guarantees - Amounts Paid and Incurred for GMDB (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Balances, January 1,	$ 5,566	$ 5,993	$ 6,928
Incurred guaranteed benefits	5,634	305	(135)
Paid guaranteed benefits	(920)	(732)	(800)
Balances, December 31,	10,280	5,566	5,993
GMDB
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Balances, January 1,	5,566	5,993	6,928
Incurred guaranteed benefits	821	305	(135)
Paid guaranteed benefits	(920)	(732)	(800)
Balances, December 31,	5,467	5,566	5,993
GLWB
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Balances, January 1,	0	0	0
Incurred guaranteed benefits	4,813	0	0
Paid guaranteed benefits	0	0	0
Balances, December 31,	$ 4,813	$ 0	$ 0

Amount of guaranteed minimum benefit payments to policyholders and contract holders, during the period presented, resulting in a decrease to the liability for expected guaranteed minimum benefits in excess of projected account values.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 80
-Section 50
-Paragraph 1
-Subparagraph (d)(4)
-URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473

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Period Type:	duration

- Definition

Amount of expected guaranteed benefits in excess of the projected account balances for minimum guaranteed benefit contracts, as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 80
-Section 50
-Paragraph 1
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473

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- Definition

Amount of guaranteed minimum benefit expense incurred for expected guaranteed minimum benefits in excess of projected account values.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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