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Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of Accumulated Other Comprehensive Income (Loss)
The table below shows the activity and accumulated balances for components of other comprehensive income. Information about unrealized gains and losses on securities can be found in Note 3, and information about unrealized gains and losses on cash flow hedge derivatives is located in Note 11.

Unrealized Gains (Losses) on Securities (1)Pension Loss Unrealized Gains (Losses) on Cash Flow Hedge Derivatives (2)Total Accumulated Other Comprehensive Income (Loss)
(In thousands)
Balance January 1, 2022
$23,174 $(20,668)$74,574 $77,080 
Other comprehensive loss before reclassifications to current earnings(676,353)— — (676,353)
Amounts reclassified to current earnings from accumulated other comprehensive income — 430 (6,050)(5,620)
 Current period other comprehensive income (loss), before tax(676,353)430 (6,050)(681,973)
Income tax (expense) benefit169,088 (107)1,512 170,493 
 Current period other comprehensive income (loss), net of tax(507,265)323 (4,538)(511,480)
Balance March 31, 2022
$(484,091)$(20,345)$70,036 $(434,400)
Balance January 1, 2021
$263,801 $(25,118)$92,694 $331,377 
Other comprehensive income (loss) before reclassifications to current earnings(211,569)— — (211,569)
Amounts reclassified to current earnings from accumulated other comprehensive income— 583 (5,848)(5,265)
 Current period other comprehensive income (loss), before tax(211,569)583 (5,848)(216,834)
Income tax (expense) benefit52,893 (146)1,462 54,209 
 Current period other comprehensive income (loss), net of tax(158,676)437 (4,386)(162,625)
Balance March 31, 2021
$105,125 $(24,681)$88,308 $168,752 
(1) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains (losses), net" in the consolidated statements of income.
(2) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income.