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Investments (Other Invested Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Other invested assets | $ 2,006,870 | $ 1,915,297
Limited Partner [Member] |  |
Other invested assets | 982,592 | 965,094
Equity Release Mortgages [Member] |  |
Other invested assets | 595,559 | 475,905
Derivatives |  |
Other invested assets | 132,412 | 180,699
Fair Value Option Contractholder Directed Unit Linked Investments [Member] |  |
Other invested assets | 202,848 | 197,770
Other |  |
Other invested assets | $ 93,459 | $ 95,829

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- Definition Amount of investments classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f,g)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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