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Short-term Borrowings - Summary of Short-Term Borrowings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Ending Balance	$ 597,835	$ 372,694	$ 138,315
Average Balance	$ 439,556	$ 144,834	$ 119,801
Average Rate	4.95%	1.38%	0.08%
Federal funds purchased
Short-term Debt [Line Items]
Ending Balance	$ 0	$ 0	$ 0
Average Balance	$ 712	$ 1,553	$ 0
Average Rate	5.62%	3.93%	0.00%
Borrowings from FHLB
Short-term Debt [Line Items]
Ending Balance	$ 563,000	$ 285,000	$ 0
Average Balance	$ 379,712	$ 41,529	$ 0
Average Rate	5.56%	4.24%	0.00%
Securities sold under agreements to repurchase
Short-term Debt [Line Items]
Ending Balance	$ 34,835	$ 87,694	$ 138,315
Average Balance	$ 59,132	$ 101,752	$ 119,801
Average Rate	1.01%	0.18%	0.08%
Maximum [Member]
Short-term Debt [Line Items]
Ending Balance	$ 597,835	$ 372,694	$ 138,315
Weighted Average [Member]
Short-term Debt [Line Items]
Average Rate	5.37%	3.56%	0.06%

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