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Accumulated Other Comprehensive Income (Loss) | 3 Months Ended
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Mar. 31, 2023
Equity [Abstract] |
Accumulated Other Comprehensive Income (Loss) | ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table summarizes the changes within each classification of AOCI, net of tax:
(dollars in thousands) | Unrealized Gains and Losses on Available- for-Sale Debt Securities |  | Unrealized Gains and Losses on Held-to- Maturity Securities |  | Gains and Losses on Hedges |  | Defined Benefit Pension Plans |  | Total
Three Months Ended March 31, 2023 |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (642,346) |  |  | $ | (112,664) |  |  | $ | (31,549) |  |  | $ | 137 |  |  | $ | (786,422) |
Other comprehensive income (loss) before reclassifications | 27,219 |  |  | 1,325 |  |  | 35,985 |  |  | — |  |  | 64,529 |
Amounts reclassified from AOCI to income (1) | 3,867 |  |  | 4,373 |  |  | 5,436 |  |  | (141) |  |  | 13,535 |
Balance at end of period | $ | (611,260) |  |  | $ | (106,966) |  |  | $ | 9,872 |  |  | $ | (4) |  |  | $ | (708,358) |
Three Months Ended March 31, 2022 |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (2,950) |  |  | $ | — |  |  | $ | 543 |  |  | $ | 32 |  |  | $ | (2,375) |
Other comprehensive income (loss) before reclassifications | (311,153) |  |  | (16,963) |  |  | (7,170) |  |  | — |  |  | (335,286) |
Amounts reclassified from AOCI to income (1) | (261) |  |  | 236 |  |  | (505) |  |  | (8) |  |  | (538) |
Balance at end of period | $ | (314,364) |  |  | $ | (16,727) |  |  | $ | (7,132) |  |  | $ | 24 |  |  | $ | (338,199) |
(1)See table below for details about reclassifications to income. The following table summarizes the significant amounts reclassified out of each component of AOCI for the three months ended March 31, 2023 and 2022:
| Three Months Ended March 31, |  |
(dollars in thousands) | 2023 |  | 2022 |  |
Details about AOCI Components | Amount Reclassified from AOCI |  | Affected Line Item in the Statement of Income
Unrealized gains and losses on available-for-sale securities | $ | (5,216) |  |  | $ | 342 |  |  | Debt securities gains (losses), net
| 1,349 |  |  | (81) |  |  | Income tax (expense) benefit
| $ | (3,867) |  |  | $ | 261 |  |  | Net income (loss)
Unrealized gains and losses on held-to-maturity securities | $ | (5,829) |  |  | $ | (310) |  |  | Interest income (expense)
| 1,456 |  |  | 74 |  |  | Income tax (expense) benefit
| $ | (4,373) |  |  | $ | (236) |  |  | Net income (loss)
Gains and losses on hedges Interest rate contracts | $ | (7,292) |  |  | $ | 669 |  |  | Interest income (expense)
| 1,856 |  |  | (164) |  |  | Income tax (expense) benefit
| $ | (5,436) |  |  | $ | 505 |  |  | Net income (loss)
Amortization of defined benefit pension items |  |  |  |  |
Actuarial gains (losses) | $ | 188 |  |  | $ | 11 |  |  | Salaries and employee benefits
| (47) |  |  | (3) |  |  | Income tax (expense) benefit
| $ | 141 |  |  | $ | 8 |  |  | Net income (loss)
Total reclassifications for the period | $ | (13,535) |  |  | $ | 538 |  |  | Net income (loss)

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI https://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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