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Derivative Instruments (Details 5) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | $ 48,243 | $ 23,801 | $ 142,614 | $ 67,321
Policy acquisition costs and other insurance expenses | (370,505) | (335,939) | (727,862) | (643,573)
Interest credited | (118,345) | (66,697) | (243,828) | (154,739)
Not Designated as Hedging Instrument |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 3,128 | 29,829 | 51,293 | 53,696
Not Designated as Hedging Instrument | Interest Rate Swaps |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (38,415) | 73,342 | (60,679) | 25,990
Not Designated as Hedging Instrument | Interest Rate Options |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (7,981) | 0 | (5,998) | 0
Not Designated as Hedging Instrument | Financial Futures |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 714 | 11,074 | (6,167) | (6,335)
Not Designated as Hedging Instrument | Foreign Currency Forwards |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (2,958) | 516 | (8,617) | (1,093)
Not Designated as Hedging Instrument | Consumer Price Index Swaps |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (1,117) | (1,431) | (1,988) | (2,233)
Not Designated as Hedging Instrument | Credit Default Swaps |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 2,427 | (4,795) | 6,332 | 7,019
Not Designated as Hedging Instrument | Equity Options |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | (5,049) | 3,367 | (35,672) | (34,616)
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | 47,717 | (4,453) | 137,974 | (13,881)
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity Products |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Policy acquisition costs and other insurance expenses | 0 | 859 | 0 | (139)
Interest credited | (28,019) | 26,279 | (61,015) | 7,538
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity Products |  |  |  |
Income Affect Of Non Hedging Derivatives [Line Items] |  |  |  |
Total investment related gains (losses), net | $ 35,809 | $ (74,929) | $ 87,123 | $ 71,446

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- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c),9(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (c)-(e) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition Interest allocated to policyholders holding contracts under which the insurer must provide a guaranteed yield. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.6) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6480726&loc=d3e6691-158385 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 7 + Details
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