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Comprehensive Income/(Loss) (Tables) | 6 Months Ended
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Jun. 30, 2019
Equity [Abstract] |
Components of Accumulated Other Comprehensive Income | The activity in accumulated other comprehensive income for the six months ended June 30, 2019 and 2018 is as follows:
|  | Accumulated Other Comprehensive Income/(Loss) (1) |
(unaudited, in thousands) |  | Defined Benefit Plans |  |  | Unrealized Gains (Losses) on Debt Securities Available-for-Sale |  |  | Unrealized Gains on Debt Securities Transferred from Available-for-Sale to Held-to-Maturity |  |  | Total |
Balance at December 31, 2018 |  | $ | (16,542 | ) |  | $ | (21,522 | ) |  | $ | 193 |  |  | $ | (37,871 | )
Other comprehensive income before reclassifications |  |  | — |  |  |  | 40,996 |  |  |  | — |  |  |  | 40,996 |
Amounts reclassified from accumulated other comprehensive income |  |  | 1,129 |  |  |  | (30 | ) |  |  | (111 | ) |  |  | 988 |
Period change |  |  | 1,129 |  |  |  | 40,966 |  |  |  | (111 | ) |  |  | 41,984 |
Balance at June 30, 2019 |  | $ | (15,413 | ) |  | $ | 19,444 |  |  | $ | 82 |  |  | $ | 4,113 |
Balance at December 31, 2017 |  | $ | (18,626 | ) |  | $ | (13,250 | ) |  | $ | 381 |  |  | $ | (31,495 | )
Other comprehensive income before reclassifications |  |  | — |  |  |  | (21,720 | ) |  |  | — |  |  |  | (21,720 | )
Amounts reclassified from accumulated other comprehensive income |  |  | 1,026 |  |  |  | — |  |  |  | (100 | ) |  |  | 926 |
Period change |  |  | 1,026 |  |  |  | (21,720 | ) |  |  | (100 | ) |  |  | (20,794 | )
Adoption of Accounting Standard ASU 2016-01 |  |  | — |  |  |  | (1,063 | ) |  |  | — |  |  |  | (1,063 | )
Balance at June 30, 2018 |  | $ | (17,600 | ) |  | $ | (36,033 | ) |  | $ | 281 |  |  | $ | (53,352 | )
(1) All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 23%.
Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss) | The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and six months ended June 30, 2019 and 2018, respectively:
Details about Accumulated Other Comprehensive Income/(Loss) Components |  | For the Three Months Ended June 30, |  |  | For the Six Months Ended June 30, |  |  |  | Affected Line Item in the Statement of Net Income
(unaudited, in thousands) |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |  |  |  |
Debt securities available-for-sale (1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net securities losses (gains) reclassified into earnings |  | $ | 4 |  |  | $ | — |  |  | $ | (38 | ) |  | $ | — |  |  |  | Net securities gains (Non-interest income)
Related income tax (benefit) expense |  |  | (1 | ) |  |  | — |  |  |  | 8 |  |  |  | — |  |  |  | Provision for income taxes
Net effect on accumulated other comprehensive income for the period |  |  | 3 |  |  |  | — |  |  |  | (30 | ) |  |  | — |  |  |  |
Debt securities held-to-maturity (1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of unrealized gain transferred from available-for-sale |  |  | (94 | ) |  |  | (66 | ) |  |  | (149 | ) |  |  | (131 | ) |  |  | Interest and dividends on securities (Interest and dividend income)
Related income tax expense |  |  | 21 |  |  |  | 15 |  |  |  | 38 |  |  |  | 31 |  |  |  | Provision for income taxes
Net effect on accumulated other comprehensive income for the period |  |  | (73 | ) |  |  | (51 | ) |  |  | (111 | ) |  |  | (100 | ) |  |  |
Defined benefit plans (2): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of net loss and prior service costs |  |  | 758 |  |  |  | 764 |  |  |  | 1,509 |  |  |  | 1,520 |  |  |  | Employee benefits (Non-interest expense)
Related income tax benefit |  |  | (173 | ) |  |  | (175 | ) |  |  | (380 | ) |  |  | (494 | ) |  |  | Provision for income taxes
Net effect on accumulated other comprehensive income for the period |  |  | 585 |  |  |  | 589 |  |  |  | 1,129 |  |  |  | 1,026 |  |  |  |
Total reclassifications for the period |  | $ | 515 |  |  | $ | 538 |  |  | $ | 988 |  |  | $ | 926 |  |  |  |
(1) For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income, see Note 4, “Securities.” (2) Included in the computation of net periodic pension cost. See Note 8, “Pension & Postretirement Medical Benefit Plans” for additional detail.

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e526-108580 + Details
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