Balance Sheet Offsetting - Financial Instruments Eligible for Offset Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	$ 52,094	$ 88,337
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	52,094	88,337
Gross Amount Recognized, Resell agreements, Financial assets	0	9,650
Gross Amount Offset, Resell agreements, Financial assets	0	0
Net Amount Recognized, Resell agreements, Financial assets	0	9,650
Gross Amount Recognized, Financial assets	52,094	97,987
Gross Amount Offset, Financial assets	0	0
Net Amount Recognized, Financial assets	52,094	97,987
Gross Amount Recognized, Derivatives, Financial Liabilities	146,428	22,504
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	146,428	22,504
Gross Amount Recognized, Repurchase agreements, Financial liabilities	4,101,707	4,525,855
Gross Amount Offset, Repurchase agreements, Financial liabilities	0	0
Net Amount Recognized, Repurchase agreements, Financial liabilities	4,101,707	4,525,855
Gross Amount Recognized, Financial liabilities	4,248,135	4,548,359
Gross Amount Offset, Financial liabilities	0	0
Net Amount Recognized, Financial Liabilities	4,248,135	4,548,359
Loan/lease interest rate swaps and caps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	39,143	38,065
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	39,143	38,065
Gross Amount Recognized, Derivatives, Financial Liabilities	13,819	20,598
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	13,819	20,598
Commodity swaps and options [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	12,951	50,272
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	12,951	50,272
Gross Amount Recognized, Derivatives, Financial Liabilities	132,609	1,906
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	132,609	$ 1,906
Foreign currency forward contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	0
Gross Amount Offset, Derivatives, Financial assets	0
Net Amount Recognized, Derivatives, Financial assets	0
Gross Amount Recognized, Derivatives, Financial Liabilities	0
Gross Amount Offset, Derivatives, Financial liabilities	0
Net Amount Recognized, Derivatives, Financial liabilities	$ 0