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v3.23.2

Other Comprehensive Income (Loss) - Component of Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Equity [Abstract] |  |  |  |
Securities available for sale and transferred securities, Change in net unrealized gain/loss during the period, Before Tax Amount | $ (206,863) | $ (636,523) | $ 53,406 | $ (1,547,318)
Securities available for sale and transferred securities, Change in net unrealized gain on securities transferred to held to maturity, Before Tax Amount | (162) | (189) | (322) | (398)
Securities available for sale and transferred securities, Reclassification adjustment for net (gains) losses included in net income, Before Tax Amount | (33) | 0 | (54) | 0
Total securities available for sale and transferred securities, before tax amount | (207,058) | (636,712) | 53,030 | (1,547,716)
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit), before tax amount | 870 | 741 | 1,740 | 1,482
Total defined-benefit post-retirement benefit plans | 870 | 741 | 1,740 | 1,482
Total other comprehensive income (loss), before tax | (206,188) | (635,971) | 54,770 | (1,546,234)
Securities available for sale and transferred securities, Change in net unrealized gain/loss during the period, Tax Expense (Benefit) | (43,441) | (133,670) | 11,215 | (324,937)
Securities available for sale and transferred securities, Change in net unrealized gain on securities transferred to held to maturity, Tax Expense (Benefit) | (34) | (40) | (67) | (84)
Securities available for sale and transferred securities, Reclassification adjustment for net (gains) losses included in net income, Tax Expense (Benefit) | (7) | 0 | (11) | 0
Total securities available for sale and transferred securities, Tax Expense (Benefit) | (43,482) | (133,710) | 11,137 | (325,021)
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit), Tax Expense (Benefit) | 183 | 155 | 366 | 311
Total defined-benefit post-retirement benefit plans, Tax Expense (Benefit) | 183 | 155 | 366 | 311
Total other comprehensive income (loss), Tax Expense (Benefit) | (43,299) | (133,555) | 11,503 | (324,710)
Securities available for sale and transferred securities, Change in net unrealized gain/loss during the period, Net of Tax | (163,422) | (502,853) | 42,191 | (1,222,381)
Securities available for sale and transferred securities, Change in net unrealized gain on securities transferred to held to maturity, Net of Tax | (128) | (149) | (255) | (314)
Securities available for sale and transferred securities, Reclassification adjustment for net (gains) losses included in net income, Net of Tax | (26) | 0 | (43) | 0
Total securities available for sale and transferred securities, Net of Tax | (163,576) | (503,002) | 41,893 | (1,222,695)
Reclassification adjustment for net amortization of actuarial gain/lloss included in net income as a component of net periodic cost (benefit), Net of Tax | 687 | 586 | 1,374 | 1,171
Total defined-benefit post-retirement benefit plans, Net of Tax Amount | 687 | 586 | 1,374 | 1,171
Other comprehensive income (loss), net of tax | $ (162,889) | $ (502,416) | $ 43,267 | $ (1,221,524)

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