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Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Cumulative Paid Claims And Allocated Claim Adjustment Expense Net Of Reinsurance) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
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Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | $ 85,747 |  |  |  |  |  |
All outstanding liabilities before 2012, net of reinsurance | 85,101 |  |  |  |  |  |
Liabilities for claims and claim adjustment expenses, net of reinsurance | 113,090 |  |  |  |  |  |
Accident Year 2014 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 10,327 | $ 10,327 | $ 10,325 | $ 9,293 | $ 9,270 | $ 8,087 | $ 6,154
Accident Year 2015 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 11,092 | 11,087 | 10,343 | 9,730 | 9,601 | $ 7,509 |
Accident Year 2016 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 11,764 | 11,746 | 11,643 | 10,665 | $ 7,777 |  |
Accident Year 2017 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 15,012 | 14,825 | 11,638 | $ 8,970 |  |  |
Accident Year 2018 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 15,150 | 12,698 | $ 8,838 |  |  |  |
Accident Year 2019 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | 14,737 | $ 7,366 |  |  |  |  |
Accident Year 2020 [Member] |  |  |  |  |  |  |
Incurred claims development [Abstract] |  |  |  |  |  |  |
Shortduration Insurance Contracts Cumulative Paid Claims And Allocated Claim Adjustment Expense Net | $ 7,665 |  |  |  |  |  |

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- Definition Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438 + Details
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- Definition Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671315-158438 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438 + Details
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