Balance Sheet Offsetting - Financial Instruments Eligible for Offset Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivative, Financial Assets	$ 23,339	$ 11,111
Gross Amount Offset, Derivatives, Financial Assets	0	0
Net Amount Recognized, Derivative, Financial Assets	23,339	11,111
Gross Amount Recognized, Resell Agreements, Financial Assets	7,903	0
Gross Amount Offset, Resell Agreements, Financial Assets	0	0
Net Amount Recognized, Resell Agreements, Financial Assets	7,903	0
Gross Amount Recognized, Financial Assets	31,242	11,111
Gross Amount Offset, Financial Assets	0	0
Net Amount Recognized, Financial Assets	31,242	11,111
Gross Amount Recognized, Derivative, Financial Liabilities	114,019	69,323
Gross Amount Offset, Derivative, Financial Liabilities	0	0
Net Amount Recognized, Derivative, Financial Liabilities	114,019	69,323
Gross Amount Recognized, Repurchase Agreements, Financial Liabilities	2,740,799	2,068,147
Gross Amount Offset, Repurchase Agreements, Financial Liabilities	0	0
Net Amount Recognized, Repurchase Agreements, Financial Liabilities	2,740,799	2,068,147
Gross Amount Recognized, Financial Liabilities	2,854,818	2,137,470
Gross Amount Offset, Financial Liabilities	0	0
Net Amount Recognized, Financial Liabilities	2,854,818	2,137,470
Loan Lease Interest Rate Swaps And Caps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivative, Financial Assets	4,446	1,241
Gross Amount Offset, Derivatives, Financial Assets	0	0
Net Amount Recognized, Derivative, Financial Assets	4,446	1,241
Commodity Swaps And Options [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivative, Financial Assets	18,864	9,870
Gross Amount Offset, Derivatives, Financial Assets	0	0
Net Amount Recognized, Derivative, Financial Assets	18,864	9,870
Gross Amount Recognized, Derivative, Financial Liabilities	94,843	35,377
Gross Amount Offset, Derivative, Financial Liabilities	0	0
Net Amount Recognized, Derivative, Financial Liabilities	94,843	35,377
Foreign Currency Forward Contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivative, Financial Assets	29
Gross Amount Offset, Derivatives, Financial Assets	0
Net Amount Recognized, Derivative, Financial Assets	29
Gross Amount Recognized, Derivative, Financial Liabilities		0
Gross Amount Offset, Derivative, Financial Liabilities		0
Net Amount Recognized, Derivative, Financial Liabilities		0
Loan Lease Interest Rate Swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Gross Amount Recognized, Derivative, Financial Liabilities	19,176	33,946
Gross Amount Offset, Derivative, Financial Liabilities	0	0
Net Amount Recognized, Derivative, Financial Liabilities	$ 19,176	$ 33,946