Policy Benefits for Life and Annuity Contracts - Schedule of Life and Annuity Benefits (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Insurance [Abstract]
Life	$ 367,551	$ 380,874
Annuities	956,088	963,323
Policy benefits for life and annuity contracts	1,323,639	1,344,197
Fair value adjustments	(68,375)	(71,097)
Policy benefits for life and annuity contracts, net of fair value adjustments	$ 1,255,264	$ 1,273,100

Amount of accrued obligation to policyholders that relates to insured events under individual and group annuities and supplementary insurance contracts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 25

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=28366191&loc=d3e13145-158430

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph a

-Article 7

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.13(a)(1))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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