Derivative Financial Instruments (Offsetting Derivatives) (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative instrument asset, Amount Offset, Total	$ (16,129)	$ (6,364)
Derivative instrument asset, Amount Offset	184,095	19,272
Derivative asset	22,682	133,481
Derivative Liability, Fair Value, Amount Offset Against Collateral	16,129	6,364
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	(2,119)
Derivative liability	398,370	13,301
Derivative Credit Risk Valuation Adjustment, Derivative Assets	8,400
Hedge Accounting Positions [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	217,246	25,636
Derivative instrument asset, Amount Offset, Total	(16,129)	(6,364)
Derivative asset	184,095	19,272
Derivative Liability, Fair Value, Gross Liability	16,129	8,483
Derivative Liability, Fair Value, Amount Offset Against Collateral	16,129	6,364
Derivative liability	0	2,119
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(17,022)	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	17,392	51
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	1,545	428
Interest Rate Derivatives [Member] | Hedge Accounting Positions [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,515	17,583
Derivative Liability, Fair Value, Gross Liability	$ 9,632	$ 0