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Fair Value (Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs By Asset Type) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Market Value [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | $ 772,979 | $ 435,959
Total gains or (losses) (realized/unrealized) Included in earnings | 1,772 | 4,925
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) | 10,710 | 3,502
Purchases, issuances and settlements | 545,687 | 323,898
Transfers in and/or (out) of Level 3 | (924) | 4,695
Ending balance | 1,330,224 | 772,979
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date | (539) |
Market Value [Member] | Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 617,588 | 428,215
Total gains or (losses) (realized/unrealized) Included in earnings | 1,216 | 4,937
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) | (1,115) | (20)
Purchases, issuances and settlements | 84,840 | 179,761
Transfers in and/or (out) of Level 3 | (1,037) | 4,695
Ending balance | 701,492 | 617,588
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date | (539) |
Market Value [Member] | Asset Backed Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 153,641 |
Total gains or (losses) (realized/unrealized) Included in earnings | 681 |
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) | 11,678 | 3,632
Purchases, issuances and settlements | 457,033 | 150,009
Transfers in and/or (out) of Level 3 |  |
Ending balance | 623,033 | 153,641
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  |
Market Value [Member] | Foreign Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 1,750 | 7,744
Total gains or (losses) (realized/unrealized) Included in earnings | (125) | (12)
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) | 147 | (110)
Purchases, issuances and settlements | 3,814 | (5,872)
Transfers in and/or (out) of Level 3 | 113 |
Ending balance | 5,699 | 1,750
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  |
Fair Value [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 5,826 | 2,337
Total gains or (losses) (realized/unrealized) Included in earnings | (919) | 2,163
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) |  |
Purchases, issuances and settlements | (4,907) | 1,326
Transfers in and/or (out) of Level 3 |  |
Ending balance |  | 5,826
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  | 1,795
Fair Value [Member] | Foreign Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 5,826 | 2,337
Total gains or (losses) (realized/unrealized) Included in earnings | (919) | 2,163
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) |  |
Purchases, issuances and settlements | (4,907) | 1,326
Transfers in and/or (out) of Level 3 |  |
Ending balance |  | 5,826
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  | $ 1,795

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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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