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Organization and Basis of Presentation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 15, 2023
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Cash proceeds from sale of wholesale mortgage     $ 186,460 $ 460,655
Loss on sale of LSMG     1,523 $ 2,617
LenderSelect Mortgage Group [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Cash proceeds from sale of wholesale mortgage $ 250      
Other Noninterest Income [Member] | LenderSelect Mortgage Group [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Loss on sale of LSMG   $ 553 $ 553