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Intangible Assets, Net and Goodwill (Tables)
 12 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets
Intangible assets consist of the following:
December 31, 2025December 31, 2024
(in thousands)Gross Carrying ValueAccumulated AmortizationNet Carrying ValueGross Carrying ValueAccumulated AmortizationNet Carrying Value
Acquired relationships$1,253,396 $(344,992)$908,404 $1,136,326 $(259,125)$877,201 
Software163,514 (95,547)67,967 138,119 (65,190)72,929 
Trade names28,474 (26,411)2,063 27,924 (24,562)3,362 
Total intangible assets$1,445,384 $(466,950)$978,434 $1,302,369 $(348,877)$953,492 
Schedule of Future Amortization Expense for Intangible Assets
Future annual estimated amortization expense over the next five years for intangible assets is as follows (in thousands):
For the Years Ending December 31,Amortization
2026$126,061 
2027108,232 
202890,334 
202979,422 
203072,271 
Schedule of Goodwill
The changes in carrying value of goodwill by operating group are as follows:
(in thousands)Insurance Advisory SolutionsUnderwriting, Capacity & Technology Solutions Mainstreet Insurance Solutions Total
Balance at December 31, 2023 and 2024$932,487 $235,589 $244,293 $1,412,369 
Goodwill of acquired businesses— 6,316 98,486 104,802 
Balance at December 31, 2025$932,487 $241,905 $342,779 $1,517,171