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Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table shows changes in accumulated other comprehensive income (loss) by component for the periods indicated:
|  | Unrealized Gains and Losses on Available for Sale Securities (1) |  | Unrealized Gains and Losses on Pension Plan Liability (1) |  | Unrealized Gains and Losses on Hedging Instruments (1) |  | Total (1)
Three Months Ended March 31, 2022 |  | (in thousands)
Beginning balance |  | $ | 23,134 |  |  | $ | (4,812) |  |  | $ | 16,840 |  |  | $ | 35,162 |
Other comprehensive loss before reclassifications |  | (259,988) |  |  | — |  |  | — |  |  | (259,988) |
Amounts reclassified from accumulated other comprehensive income (2) |  | (1,076) |  |  | 101 |  |  | (1,976) |  |  | (2,951) |
Net current-period other comprehensive income (loss) |  | (261,064) |  |  | 101 |  |  | (1,976) |  |  | (262,939) |
Ending balance |  | $ | (237,930) |  |  | $ | (4,711) |  |  | $ | 14,864 |  |  | $ | (227,777) |
Three Months Ended March 31, 2021 |  |  |  |  |  |  |  |
Beginning balance |  | $ | 163,174 |  |  | $ | (5,833) |  |  | $ | 24,854 |  |  | $ | 182,195 |
Other comprehensive loss before reclassifications |  | (102,605) |  |  | — |  |  | — |  |  | (102,605) |
Amounts reclassified from accumulated other comprehensive income (2) |  | — |  |  | 115 |  |  | (1,977) |  |  | (1,862) |
Net current-period other comprehensive income (loss) |  | (102,605) |  |  | 115 |  |  | (1,977) |  |  | (104,467) |
Ending balance |  | $ | 60,569 |  |  | $ | (5,718) |  |  | $ | 22,877 |  |  | $ | 77,728 |
__________ (1) All amounts are net of tax. Amounts in parentheses indicate debits. (2) See following table for details about these reclassifications.
Schedule of reclassifications from accumulated other comprehensive income [Table Text Block] | The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the periods indicated:
|  | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  |
|  | Three Months Ended March 31, |  |  |  | Affected line Item in the Consolidated
|  | 2022 |  | 2021 |  |  |  |  |  | Statement of Income
|  | (in thousands) |  |
Amortization of unrealized gains related to securities transfer |  | 1,402 |  |  | — |  |  |  |  |  |  | Taxable securities
|  | 1,402 |  |  | — |  |  |  |  |  |  | Total before tax
|  | (326) |  |  | — |  |  |  |  |  |  | Income tax provision
|  | $ | 1,076 |  |  | $ | — |  |  |  |  |  |  | Net of tax
Amortization of pension plan liability actuarial losses |  | $ | (131) |  |  | $ | (150) |  |  |  |  |  |  | Compensation and employee benefits
|  | (131) |  |  | (150) |  |  |  |  |  |  | Total before tax
|  | 30 |  |  | 35 |  |  |  |  |  |  | Income tax provision
|  | $ | (101) |  |  | $ | (115) |  |  |  |  |  |  | Net of tax
Unrealized gains from hedging instruments |  | $ | 2,575 |  |  | $ | 2,576 |  |  |  |  |  |  | Loans
|  | 2,575 |  |  | 2,576 |  |  |  |  |  |  | Total before tax
|  | (599) |  |  | (599) |  |  |  |  |  |  | Income tax provision
|  | $ | 1,976 |  |  | $ | 1,977 |  |  |  |  |  |  | Net of tax

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- Definition Accumulated Other Comprehensive Income (Loss) [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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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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