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Accumulated Other Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2019
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 three and nine months ended September 30, 2019 and 2018:
|  | 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 September 30, 2019 |  | (in thousands)
Beginning balance |  | $ | 37,162 |  |  | $ | (2,055 | ) |  | $ | 12,043 |  |  | $ | 47,150 |
Other comprehensive income before reclassifications |  | 14,593 |  |  | — |  |  | 3,137 |  |  | 17,730 |
Amounts reclassified from accumulated other comprehensive income (2) |  | — |  |  | 62 |  |  | (58 | ) |  | 4 |
Net current-period other comprehensive income |  | 14,593 |  |  | 62 |  |  | 3,079 |  |  | 17,734 |
Ending balance |  | $ | 51,755 |  |  | $ | (1,993 | ) |  | $ | 15,122 |  |  | $ | 64,884 |
Three Months Ended September 30, 2018 |  |  |  |  |  |  |  |
Beginning balance |  | $ | (53,597 | ) |  | $ | (2,324 | ) |  | $ | — |  |  | $ | (55,921 | )
Other comprehensive loss before reclassifications |  | (14,149 | ) |  | — |  |  | — |  |  | (14,149 | )
Amounts reclassified from accumulated other comprehensive loss (2) |  | — |  |  | 61 |  |  | — |  |  | 61 |
Net current-period other comprehensive income (loss) |  | (14,149 | ) |  | 61 |  |  | — |  |  | (14,088 | )
Ending balance |  | $ | (67,746 | ) |  | $ | (2,263 | ) |  | $ | — |  |  | $ | (70,009 | )
Nine Months Ended September 30, 2019 |  |  |  |  |  |  |  |
Beginning balance |  | $ | (33,128 | ) |  | $ | (2,177 | ) |  | $ | — |  |  | $ | (35,305 | )
Other comprehensive income before reclassifications |  | 86,519 |  |  | — |  |  | 15,180 |  |  | 101,699 |
Amounts reclassified from accumulated other comprehensive loss (2) |  | (1,636 | ) |  | 184 |  |  | (58 | ) |  | (1,510 | )
Net current-period other comprehensive income |  | 84,883 |  |  | 184 |  |  | 15,122 |  |  | 100,189 |
Ending balance |  | $ | 51,755 |  |  | $ | (1,993 | ) |  | $ | 15,122 |  |  | $ | 64,884 |
Nine Months Ended September 30, 2018 |  |  |  |  |  |  |  |
Beginning balance |  | $ | (19,779 | ) |  | $ | (2,446 | ) |  | $ | — |  |  | $ | (22,225 | )
Adjustment pursuant to adoption of ASU 2016-01 |  | 157 |  |  | — |  |  | — |  |  | 157 |
Other comprehensive loss before reclassifications |  | (48,043 | ) |  | — |  |  | — |  |  | (48,043 | )
Amounts reclassified from accumulated other comprehensive loss (2) |  | (81 | ) |  | 183 |  |  | — |  |  | 102 |
Net current-period other comprehensive income (loss) |  | (48,124 | ) |  | 183 |  |  | — |  |  | (47,941 | )
Ending balance |  | $ | (67,746 | ) |  | $ | (2,263 | ) |  | $ | — |  |  | $ | (70,009 | )
__________ (1) All amounts are net of tax. Amounts in parenthesis 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 three and nine months ended September 30, 2019 and 2018:
|  | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |  | Affected line Item in the Consolidated
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | Statement of Income
|  | (in thousands) |  |
Unrealized gains and losses on available for sale debt securities |  |  |  |  |  |  |  |  |  |
Investment securities gains, net |  | $ | — |  |  | $ | — |  |  | $ | 2,132 |  |  | $ | 106 |  |  | Investment securities gains (losses), net
|  | — |  |  | — |  |  | 2,132 |  |  | 106 |  |  | Total before tax
|  | — |  |  | — |  |  | (496 | ) |  | (25 | ) |  | Income tax provision
|  | $ | — |  |  | $ | — |  |  | $ | 1,636 |  |  | $ | 81 |  |  | Net of tax
Amortization of pension plan liability |  |  |  |  |  |  |  |  |  |
Actuarial losses |  | $ | (81 | ) |  | $ | (80 | ) |  | $ | (240 | ) |  | $ | (239 | ) |  | Compensation and employee benefits
|  | (81 | ) |  | (80 | ) |  | (240 | ) |  | (239 | ) |  | Total before tax
|  | 19 |  |  | 19 |  |  | 56 |  |  | 56 |  |  | Income tax provision
|  | $ | (62 | ) |  | $ | (61 | ) |  | $ | (184 | ) |  | $ | (183 | ) |  | Net of tax
Unrealized gains and losses from hedging instruments |  |  |  |  |  |  |  |  |  |
Interest income |  | $ | 76 |  |  | $ | — |  |  | $ | 76 |  |  | $ | — |  |  | Loans
|  | 76 |  |  | — |  |  | 76 |  |  | — |  |  | Total before tax
|  | (18 | ) |  | — |  |  | (18 | ) |  | — |  |  | Income tax provision
|  | $ | 58 |  |  | $ | — |  |  | $ | 58 |  |  | $ | — |  |  | 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://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=118930883&loc=SL7669686-108580 + Details
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