Balance Sheet Offsetting - Financial Instruments Eligible for Offset Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	$ 130,330	$ 118,994
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	130,330	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	214,980	206,144
Gross Amount Offset, Financial assets	0	0
Net Amount Recognized, Financial assets	214,980	206,144
Gross Amount Recognized, Derivatives, Financial Liabilities	29,402	73,829
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	29,402	73,829
Gross Amount Recognized, Repurchase agreements, Financial liabilities	3,569,870	4,660,641
Gross Amount Offset, Repurchase agreements, Financial liabilities	0	0
Net Amount Recognized, Repurchase agreements, Financial liabilities	3,569,870	4,660,641
Gross Amount Recognized, Financial liabilities	3,599,272	4,734,470
Gross Amount Offset, Financial liabilities	0	0
Net Amount Recognized, Financial Liabilities	3,599,272	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	92,961	85,691
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	92,961	85,691
Gross Amount Recognized, Derivatives, Financial Liabilities	1,332	1,102
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	1,332	1,102
Commodity swaps and options [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivatives, Financial Assets	37,369	33,302
Gross Amount Offset, Derivatives, Financial assets	0	0
Net Amount Recognized, Derivatives, Financial assets	37,369	33,302
Gross Amount Recognized, Derivatives, Financial Liabilities	28,070	72,717
Gross Amount Offset, Derivatives, Financial liabilities	0	0
Net Amount Recognized, Derivatives, Financial liabilities	$ 28,070	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		10
Gross Amount Offset, Derivatives, Financial liabilities		0
Net Amount Recognized, Derivatives, Financial liabilities		$ 10