Investments (Purchased Credit Impaired Securities Included in Fixed Maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities [Abstract]
Outstanding principal and interest balance	$ 208,044	[1]	$ 192,644	[1]
Carrying value, including accrued interest	$ 165,740	[2]	$ 148,822	[2]

[1] Represents the contractually required payments which is the sum of contractual principal, whether or not currently due, and accrued interest.

[2] Estimated fair value plus accrued interest.