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Balance Sheet Offsetting - Financial Instruments Eligible for Offset Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial Assets | $ 14,211 | $ 11,111
Gross Amount Offset, Derivatives, Financial assets | 0 | 0
Net Amount Recognized, Derivatives, Financial assets | 14,211 | 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 | 22,114 | 11,111
Gross Amount Offset, Financial assets | 0 | 0
Net Amount Recognized, Financial assets | 22,114 | 11,111
Gross Amount Recognized, Derivatives, Financial Liabilities | 177,239 | 69,323
Gross Amount Offset, Derivatives, Financial liabilities | 0 | 0
Net Amount Recognized, Derivatives, Financial liabilities | 177,239 | 69,323
Gross Amount Recognized, Repurchase agreements, Financial liabilities | 2,216,889 | 2,068,147
Gross Amount Offset, Repurchase agreements, Financial liabilities | 0 | 0
Net Amount Recognized, Repurchase agreements, Financial liabilities | 2,216,889 | 2,068,147
Gross Amount Recognized, Financial liabilities | 2,394,128 | 2,137,470
Gross Amount Offset, Financial liabilities | 0 | 0
Net Amount Recognized, Financial Liabilities | 2,394,128 | 2,137,470
Loan/lease interest rate swaps and caps [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial Assets | 3,394 | 1,241
Gross Amount Offset, Derivatives, Financial assets | 0 | 0
Net Amount Recognized, Derivatives, Financial assets | 3,394 | 1,241
Commodity swaps and options [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial Assets | 10,817 | 9,870
Gross Amount Offset, Derivatives, Financial assets | 0 | 0
Net Amount Recognized, Derivatives, Financial assets | 10,817 | 9,870
Gross Amount Recognized, Derivatives, Financial Liabilities | 152,582 | 35,377
Gross Amount Offset, Derivatives, Financial liabilities | 0 | 0
Net Amount Recognized, Derivatives, Financial liabilities | 152,582 | 35,377
Loan/lease interest rate swaps [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial Liabilities | 24,657 | 33,946
Gross Amount Offset, Derivatives, Financial liabilities | 0 | 0
Net Amount Recognized, Derivatives, Financial liabilities | $ 24,657 | $ 33,946

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