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Securities Sold Under Agreements to Repurchase - Summary of Remaining Contractual Maturity of Securities Sold Under Agreements to Repurchase (Detail) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings $ 176,107 $ 142,085
Overnight and Continuous    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 176,107 142,085
Mortgage-backed securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 12,602 0
Mortgage-backed securities | Overnight and Continuous    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 12,602 0
Other securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 163,505 142,085
Other securities | Overnight and Continuous    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings $ 163,505 $ 142,085