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Balance Sheet Offsetting - Financial Instruments Derivative Assets Liabilities and Resell Agreements Net of Amount Not Offset (Detail) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Net Amount Recognized, Derivatives, Financial Assets | $ 127,209 | $ 23,339
Gross Amounts Not Offset, Financial Instruments, Total Derivatives, Financial Assets | (89,314) | (23,339)
Gross Amount Not Offset Collateral, Derivatives, Financial Assets | (33,803) | 0
Net Amount, Derivatives, Financial Assets | 4,092 | 0
Net Amount Recognized, Resell agreements, Financial Assets | 12,150 | 7,903
Gross Amounts Not Offset Financial Instruments, Resell Agreements | 0 | 0
Gross Amounts Not Offset Collateral, Resell Agreements, Financial Assets | (12,150) | (7,903)
Net Amount, Financial Assets, Resell Agreements | 0 | 0
Net Amount Recognized, Total Financial Assets | 139,359 | 31,242
Gross Amounts Not Offset Collateral, Financial Assets | (45,953) | (7,903)
Net Amount, Financial Assets | 4,092 | 0
Net Amount Recognized, Derivatives, Financial Liabilities | 97,033 | 114,019
Gross Amounts Not Offset Financial Instruments, Total Derivatives, Financial Liabilities | (89,314) | (23,339)
Gross Amounts Not Offset Collateral, Derivatives, Financial Liabilities | (7,716) | (90,573)
Net Amount, Derivatives, Financial Liabilities | 3 | 107
Net Amount Recognized, Repurchase Agreements, Financial Liabilities | 2,082,739 | 2,740,799
Gross Amounts Not Offset Financial Instruments, Repurchase Agreements, Financial Liabilities | 0 | 0
Gross Amounts Not Offset Collateral, Repurchase Agreements, Financial Liabilities | (2,082,739) | (2,740,799)
Net Amount, Repurchase Agreements, Financial Liabilities | 0 | 0
Net Amount Recognized, Total Financial Liabilities | 2,179,772 | 2,854,818
Gross Amounts Not Offset Collateral, Financial Liabilities | (2,090,455) | (2,831,372)
Net Amount, Financial Liabilities | 3 | 107
Counterparty A [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Net Amount Recognized, Derivatives, Financial Assets | 47 | 6
Gross Amounts Not Offset, Financial Instruments, Total Derivatives, Financial Assets | (47) | (6)
Gross Amount Not Offset Collateral, Derivatives, Financial Assets | 0 | 0
Net Amount, Derivatives, Financial Assets | 0 | 0
Net Amount Recognized, Derivatives, Financial Liabilities | 1,081 | 3,870
Gross Amounts Not Offset Financial Instruments, Total Derivatives, Financial Liabilities | (47) | (6)
Gross Amounts Not Offset Collateral, Derivatives, Financial Liabilities | (1,031) | (3,864)
Net Amount, Derivatives, Financial Liabilities | 3 | 0
Counterparty B [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Net Amount Recognized, Derivatives, Financial Assets | 44,271 | 7,655
Gross Amounts Not Offset, Financial Instruments, Total Derivatives, Financial Assets | (35,853) | (7,655)
Gross Amount Not Offset Collateral, Derivatives, Financial Assets | (6,063) | 0
Net Amount, Derivatives, Financial Assets | 2,355 | 0
Net Amount Recognized, Derivatives, Financial Liabilities | 35,853 | 28,130
Gross Amounts Not Offset Financial Instruments, Total Derivatives, Financial Liabilities | (35,853) | (7,655)
Gross Amounts Not Offset Collateral, Derivatives, Financial Liabilities | 0 | (20,475)
Net Amount, Derivatives, Financial Liabilities | 0 | 0
Counterparty C [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Net Amount Recognized, Derivatives, Financial Assets | 407 |
Gross Amounts Not Offset, Financial Instruments, Total Derivatives, Financial Assets | (251) |
Gross Amount Not Offset Collateral, Derivatives, Financial Assets | 0 |
Net Amount, Derivatives, Financial Assets | 156 |
Net Amount Recognized, Derivatives, Financial Liabilities | 251 | 9
Gross Amounts Not Offset Financial Instruments, Total Derivatives, Financial Liabilities | (251) | 0
Gross Amounts Not Offset Collateral, Derivatives, Financial Liabilities | 0 | (9)
Net Amount, Derivatives, Financial Liabilities | 0 | 0
Other Counterparties [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Net Amount Recognized, Derivatives, Financial Assets | 82,484 | 15,678
Gross Amounts Not Offset, Financial Instruments, Total Derivatives, Financial Assets | (53,163) | (15,678)
Gross Amount Not Offset Collateral, Derivatives, Financial Assets | (27,740) | 0
Net Amount, Derivatives, Financial Assets | 1,581 | 0
Net Amount Recognized, Derivatives, Financial Liabilities | 59,848 | 82,010
Gross Amounts Not Offset Financial Instruments, Total Derivatives, Financial Liabilities | (53,163) | (15,678)
Gross Amounts Not Offset Collateral, Derivatives, Financial Liabilities | (6,685) | (66,225)
Net Amount, Derivatives, Financial Liabilities | $ 0 | $ 107

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Data Type: | na
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