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Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The fair values of derivative instruments, including derivative instruments embedded in FIA and IUL contracts are presented in the Consolidated Balance Sheets as follows:
($ in thousands) |  | December 31,
|  | 2017 |  | 2016
Assets |  |  |  |  |  |
Derivative instruments, included in Short-term and other investments |  | $ | 15,550 |  |  | $ | 8,694 |
Liabilities |  |  |  |  |  |
Fixed indexed annuities - embedded derivatives, included in Other policyholder funds |  | 80,733 |  |  | 59,393 |
Indexed universal life - embedded derivatives, included in Investment contract and life policy reserves |  | 594 |  |  | 158 |
Derivative Instruments, Gain (Loss) | The changes in fair value of derivatives included in the Consolidated Statements of Operations were as follows:
($ in thousands) |  | Years Ended December 31,
|  | 2017 |  | 2016 |  | 2015
Change in fair value of derivatives (1): |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |
Net realized investment gains (losses) |  | $ | 14,867 |  |  | $ | 4,024 |  |  | $ | (1,483 | )
Change in fair value of embedded derivatives: |  |  |  |  |  |
Revenues |  |  |  |  |  |
Net realized investment gains (losses) |  | (13,410 | ) |  | (5,076 | ) |  | 2,529 |
____________________ (1) Includes gains or losses recognized at the expiration of the option term or early termination and the changes in fair value for open options.
Financing Receivable Credit Quality Indicators | The notional amount and fair value of call options by counterparty and each counterparty's long-term credit ratings were as follows:
($ in thousands) |  | December 31, 2017 |  | December 31, 2016
|  | Credit Rating |  | Notional |  | Fair |  | Notional |  | Fair
Counterparty |  | S&P |  | Moody's |  | Amount |  | Value |  | Amount |  | Value
Bank of America, N.A. |  | A+ |  | Aa3 |  | $ | 85,100 |  |  | $ | 6,320 |  |  | $ | 38,500 |  |  | $ | 1,934 |
Barclays Bank PLC |  | A |  | A1 |  | 48,900 |  |  | 1,828 |  |  | 66,800 |  |  | 1,543 |
Citigroup Inc. |  | BBB+ |  |  |  | — |  |  | — |  |  | — |  |  | — |
Credit Suisse International |  | A |  | A1 |  | 21,100 |  |  | 1,444 |  |  | 65,200 |  |  | 4,281 |
Societe Generale |  | A |  |  |  | 91,700 |  |  | 5,958 |  |  | 15,600 |  |  | 936 |
Total |  |  |  |  |  | $ | 246,800 |  |  | $ | 15,550 |  |  | $ | 186,100 |  |  | $ | 8,694 |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41641-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41638-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579240-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41620-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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