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Liability for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Direct losses and loss adjustment expenses | $ 347,207 | $ 334,440 | $ 682,896 | $ 663,768
Ceded losses and loss adjustment expenses | 108,730 | 201,869 | 158,026 | 304,807
Incurred (recovered) related to prior years | 30,085 | $ 3,218 | $ 34,904 | 3,703
Term of notice |  |  | 3 years |
Hurricane |  |  |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Direct losses and loss adjustment expenses | 136,700 |  | $ 190,800 | 305,300
Ceded losses and loss adjustment expenses | 106,700 |  | 155,900 | 301,600
Incurred (recovered) related to prior years | $ 30,100 |  | $ 34,900 | $ 3,700

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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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