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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Summary of activity in accumulated other comprehensive income (loss) | The following tables summarize the components of accumulated other comprehensive income (loss) at March 31, 2022 and 2021, including changes during the preceding three month periods as well as any reclassifications out of accumulated other comprehensive income (loss):
($ in Thousands) | Investment Securities AFS | Defined Benefit Pension and Postretirement Obligations | Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2021 | $ | (5,266) |  | $ | (5,051) |  | $ | (10,317) |
Other comprehensive (loss) before reclassifications | (103,284) |  | — |  | (103,284) |
Unrealized (losses) on AFS securities transferred to HTM securities | (67,604) |  | — |  | (67,604) |
Amounts reclassified from accumulated other comprehensive income (loss) |  |  |
Investment securities (gains), net | (21) |  | — |  | (21) |
Investment securities HTM, net, at amortized cost | 1,108 |  | — |  | 1,108 |
Personnel expense | — |  | (81) |  | (81) |
Other expense | — |  | 74 |  | 74 |
Income tax benefit | 43,098 |  | 2 |  | 43,100 |
Net other comprehensive (loss) during period | (126,702) |  | (6) |  | (126,708) |
Balance March 31, 2022 | $ | (131,968) |  | $ | (5,057) |  | $ | (137,024) |
Balance December 31, 2020 | $ | 41,325 |  | $ | (28,707) |  | $ | 12,618 |
Other comprehensive (loss) before reclassifications | (23,979) |  | — |  | (23,979) |
Amounts reclassified from accumulated other comprehensive income (loss) |  |  |
Investment securities losses , net | 39 |  | — |  | 39 |
Investment securities HTM, net, at amortized cost | 518 |  | — |  | 518 |
Personnel expense | — |  | (37) |  | (37) |
Other expense | — |  | 1,050 |  | 1,050 |
Income tax (expense) benefit | 5,851 |  | (253) |  | 5,598 |
Net other comprehensive income (loss) during period | (17,571) |  | 760 |  | (16,811) |
Balance March 31, 2021 | $ | 23,754 |  | $ | (27,947) |  | $ | (4,193) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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