Reinsurance (Amounts Included In BS) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Reinsurance [Abstract]
Domestic life insurance-affiliated	$ 10,771,105	$ 4,619,282
Domestic individual annuities-affiliated	527	1,287,660
Domestic life insurance-unaffiliated	534	9,673
Taiwan life insurance-affiliated	1,114,718	1,115,560
Reinsurance recoverables	$ 11,886,884	$ 7,032,175