XML 114 R102.htm IDEA: XBRL DOCUMENT v3.21.1
Other Comprehensive Income (Loss) - Component of Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Equity [Abstract]    
Securities available for sale and transferred securities, Change in net unrealized gain/loss during the period, Before Tax Amount $ (159,779) $ 230,118
Securities available for sale and transferred securities, Change in net unrealized gain on securities transferred to held to maturity, Before Tax Amount (259) (377)
Securities available for sale and transferred securities, Reclassification adjustment for net (gains) losses included in net income, Before Tax Amount 0 (108,989)
Total securities available for sale and transferred securities, before tax amount (160,038) 120,752
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit), before tax amount 1,529 1,330
Total defined-benefit post-retirement benefit plans 1,529 1,330
Total other comprehensive income (loss), before tax (158,509) 122,082
Securities available for sale and transferred securities, Change in net unrealized gain/loss during the period, Tax Expense (Benefit) (33,554) 48,325
Securities available for sale and transferred securities, Change in net unrealized gain on securities transferred to held to maturity, Tax Expense (Benefit) (54) (79)
Securities available for sale and transferred securities, Reclassification adjustment for net (gains) losses included in net income, Tax Expense (Benefit) 0 (22,888)
Total securities available for sale and transferred securities, Tax Expense (Benefit) (33,608) 25,358
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit), Tax Expense (Benefit) 321 279
Total defined-benefit post-retirement benefit plans, Tax Expense (Benefit) 321 279
Total other comprehensive income (loss), Tax Expense (Benefit) (33,287) 25,637
Securities available for sale and transferred securities, Change in net unrealized gain/loss during the period, Net of Tax (126,225) 181,793
Securities available for sale and transferred securities, Change in net unrealized gain on securities transferred to held to maturity, Net of Tax (205) (298)
Securities available for sale and transferred securities, Reclassification adjustment for net (gains) losses included in net income, Net of Tax 0 (86,101)
Total securities available for sale and transferred securities, Net of Tax (126,430) 95,394
Reclassification adjustment for net amortization of actuarial gain/lloss included in net income as a component of net periodic cost (benefit), Net of Tax 1,208 1,051
Total defined-benefit post-retirement benefit plans, Net of Tax Amount 1,208 1,051
Other comprehensive income (loss), net of tax $ (125,222) $ 96,445