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Reinsurance (Tables)
 3 Months Ended
Mar. 31, 2024
Reinsurance Disclosures [Abstract]  
Effect Of Reinsurance And Retrocessional Reinsurance On Premiums Written And Earned
The following tables summarize the effect of reinsurance and retrocessional reinsurance on premiums written and earned.
Three Months Ended March 31,
20242023
(dollars in thousands)DirectAssumedCededNet PremiumsDirectAssumedCededNet Premiums
Underwriting:
Written$2,107,467 $668,699 $(543,956)$2,232,210 $1,969,363 $688,895 $(440,029)$2,218,229 
Earned$2,198,238 $392,942 $(463,380)$2,127,800 $1,971,876 $398,719 $(402,440)$1,968,155 
Program services and other fronting:
Written744,958 419,275 (1,164,406)(173)573,211 204,543 (778,205)(451)
Earned703,682 123,271 (827,126)(173)641,113 74,717 (716,281)(451)
Consolidated:
Written$2,852,425 $1,087,974 $(1,708,362)$2,232,037 $2,542,574 $893,438 $(1,218,234)$2,217,778 
Earned$2,901,920 $516,213 $(1,290,506)$2,127,627 $2,612,989 $473,436 $(1,118,721)$1,967,704 
Effect Of Reinsurance And Retrocessional Reinsurance On Losses and Loss Adjustment Expenses
The following table summarizes the effect of reinsurance and retrocessional reinsurance on losses and loss adjustment expenses in the Company's underwriting operations.

Three Months Ended March 31,
(dollars in thousands)20242023
Gross losses and loss adjustment expenses$1,693,847 $1,392,348 
Ceded losses and loss adjustment expenses(406,167)(219,255)
Net losses and loss adjustment expenses$1,287,680 $1,173,093