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Liability for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Direct losses and loss adjustment expenses | $ 173,243 | $ 115,742
Ceded Losses and Loss Adjustment Expenses | 38,195 | 2,648
Incurred (recovered) related to prior years | 4,341 | $ (185)
Hurricane |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Direct losses and loss adjustment expenses | 42,500 |
Ceded Losses and Loss Adjustment Expenses | 38,200 |
Incurred (recovered) related to prior years | $ 4,300 |

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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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