Balance Sheet Offsetting - Financial Instruments Eligible for Offset Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	$ 110,392	$ 118,994
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	110,392	118,994
Gross Amount Recognized, Resell agreements, Financial assets	84,650	87,150
Gross Amount Offset, Resell agreements, Financial assets	0	0
Net Amount Recognized, Resell agreements, Financial assets	84,650	87,150
Gross Amount Recognized, Financial assets	195,042	206,144
Gross Amount Offset, Financial assets	0	0
Net Amount Recognized, Financial assets	195,042	206,144
Gross Amount Recognized, Derivatives, Financial Liabilities	44,882	73,829
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	44,882	73,829
Gross Amount Recognized, Repurchase agreements, Financial liabilities	4,237,444	4,660,641
Gross Amount Offset, Repurchase agreements, Financial liabilities	0	0
Net Amount Recognized, Repurchase agreements, Financial liabilities	4,237,444	4,660,641
Gross Amount Recognized, Financial liabilities	4,282,326	4,734,470
Gross Amount Offset, Financial liabilities	0	0
Net Amount Recognized, Financial Liabilities	4,282,326	4,734,470
Loan/lease interest rate swaps and caps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	73,900	85,691
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	73,900	85,691
Gross Amount Recognized, Derivatives, Financial Liabilities	3,160	1,102
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	3,160	1,102
Commodity swaps and options [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	36,492	33,302
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	36,492	33,302
Gross Amount Recognized, Derivatives, Financial Liabilities	41,546	72,717
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	41,546	72,717
Foreign currency forward contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets		1
Gross Amount Offset, Derivatives, Financial assets		0
Net Amount Recognized, Derivatives, Financial assets		1
Gross Amount Recognized, Derivatives, Financial Liabilities	176	10
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	$ 176	$ 10