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Reinsurance - Additional Information (Detail) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Sep. 30, 2020 USD ($) Reinsurer | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) Reinsurer | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) Reinsurer
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items] |  |  |  |  |  |
Percentage of ceding commission on ceded premiums written |  |  |  | 30.00% |  |
Reinsurance recoverable |  | $ 95,274 |  | $ 95,274 |  | $ 132,678
Number of reinsurers | Reinsurer |  | 38 |  | 38 |  | 31
Ceded losses recognized as a reduction in losses and loss adjustment expenses |  | $ 1,871 | $ 113,888 | $ 2,220 | $ 113,888 |
Decrease in credit loss expense |  | 14 |  | 363 |  |
Allowances for credit losses related to the reinsurance recoverable balance |  | 90 |  | 90 |  | $ 0
Reduction in premiums ceded |  | 4,680 |  | 10,440 |  |
Net reduction in premiums ceded |  |  | $ 2,520 |  | $ 4,258 |
Other assets |  | 20,376 |  | 20,376 |  | 17,080
Reinsurance premium refund received | $ 13,680 |  |  |  |  |
Reinsurance [Member] |  |  |  |  |  |
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items] |  |  |  |  |  |
Other assets |  | $ 6,240 |  | $ 6,240 |  | $ 9,480
Reinsurance Recoverable [Member] | Reinsurer Concentration Risk [Member] | Florida Hurricane Catastrophe Fund [Member] |  |  |  |  |  |
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items] |  |  |  |  |  |
Percentage of reinsurance recoverable major reinsurers |  |  |  | 58.60% |  |

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- Definition Amount, before valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves. + References No definition available. + Details
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- Definition Represents a net reduction recognized in ceded premiums related to reinsurance contracts with retrospective provisions. + References No definition available. + Details
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- Definition Number of reinsurers participating in the company's reinsurance program. + References No definition available. + Details
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- Definition Percentage of ceding commission on ceded premiums written. + References No definition available. + Details
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- Definition Represents a reduction recognized in ceded premiums related to reinsurance contracts with retrospective provisions. + References No definition available. + Details
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- Definition Reinsurance premium refund received. + References No definition available. + Details
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- References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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- Definition Amount of assets classified as other. + References Reference 1: 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(17)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: 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(a)(10)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of reduction of provision for policy benefits and costs incurred for policies ceded. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387 + Details
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- Definition Amount of expense (reversal of expense) for expected credit loss on reinsurance recoverable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Amount of allowance for credit loss on reinsurance recoverable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 + Details
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