Balance Sheet Offsetting - Disclosure Detail Of Balance Sheet Offsetting Of Financial Assets And Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Derivative Liabilities
Net Amount	$ 78,956	$ 81,422
Customer-related positions
Derivative Assets
Gross Amounts Recognized	22,434	23,861
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	22,434	23,861
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	286	381
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	(14,210)	(14,430)
Net Amount	7,938	9,050
Derivative Liabilities
Gross Amounts Recognized	78,956	81,422
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	78,956	81,422
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	286	381
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	369	2,417
Net Amount	78,301	78,624
Interest rate swaps
Derivative Assets
Gross Amounts Recognized	1,378	16
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	1,378	16
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	0	0
Net Amount	1,378	16
Derivative Liabilities
Gross Amounts Recognized	25	2,417
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	25	2,417
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	25	2,417
Net Amount	0	0
Interest rate swaps | Customer-related positions
Derivative Assets
Gross Amounts Recognized	20,842	23,567
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	20,842	23,567
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	286	381
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	(14,210)	(14,430)
Net Amount	6,346	8,756
Derivative Liabilities
Gross Amounts Recognized	78,464	78,577
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	78,464	78,577
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	286	381
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	344	0
Net Amount	77,834	78,196
Risk participation agreements | Customer-related positions
Derivative Assets
Gross Amounts Recognized	96	78
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	96	78
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	0	0
Net Amount	96	78
Derivative Liabilities
Gross Amounts Recognized	119	130
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	119	130
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	0	0
Net Amount	119	130
Foreign currency exchange contracts - matched customer book | Customer-related positions
Derivative Assets
Gross Amounts Recognized	118	198
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	118	198
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	0	0
Net Amount	118	198
Derivative Liabilities
Gross Amounts Recognized	105	205
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	105	205
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	0	0
Net Amount	105	205
Foreign currency exchange contracts - foreign currency loan | Customer-related positions
Derivative Assets
Gross Amounts Recognized		2
Gross Amounts Offset in the Consolidated Balance Sheet		0
Net Amounts Presented in the Consolidated Balance Sheet		2
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments		0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)		0
Net Amount		2
Derivative Liabilities
Gross Amounts Recognized	243	93
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts Presented in the Consolidated Balance Sheet	243	93
Gross Amounts Not Offset in the Consolidated Balance Sheet, Financial Instruments	0	0
Gross Amounts Not Offset in the Consolidated Balance Sheet, Collateral Pledged (Received)	0	0
Net Amount	$ 243	$ 93