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Other Comprehensive Income | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Other Comprehensive Income | Other Comprehensive Income (In Thousands) Changes in the components of other comprehensive income, net of tax, were as follows:
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Year Ended December 31, 2017 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (3,617 | ) |  | $ | (1,399 | ) |  | $ | (2,218 | )
Unrealized holding gains on securities transferred from held to maturity to available for sale | 13,219 |  |  | 5,111 |  |  | 8,108 |
Reclassification adjustment for gains realized in net income(1) | (148 | ) |  | (57 | ) |  | (91 | )
Amortization of unrealized holding gains on securities transferred to the held to maturity category | (282 | ) |  | (109 | ) |  | (173 | )
Total securities available for sale | 9,172 |  |  | 3,546 |  |  | 5,626 |
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 874 |  |  | 338 |  |  | 536 |
Total derivative instruments | 874 |  |  | 338 |  |  | 536 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Net gain arising during the period | 1,379 |  |  | 351 |  |  | 1,028 |
Amortization of net actuarial loss recognized in net periodic pension cost(2) | 407 |  |  | 158 |  |  | 249 |
Total defined benefit pension and post-retirement benefit plans | 1,786 |  |  | 509 |  |  | 1,277 |
Total other comprehensive income | $ | 11,832 |  |  | $ | 4,393 |  |  | $ | 7,439 |
Year Ended December 31, 2016 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (10,119 | ) |  | $ | (3,913 | ) |  | $ | (6,206 | )
Reclassification adjustment for gains realized in net income(1) | (1,186 | ) |  | (459 | ) |  | (727 | )
Amortization of unrealized holding gains on securities transferred to the held to maturity category | (99 | ) |  | (38 | ) |  | (61 | )
Total securities available for sale | (11,404 | ) |  | (4,410 | ) |  | (6,994 | )
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 856 |  |  | 329 |  |  | 527 |
Total derivative instruments | 856 |  |  | 329 |  |  | 527 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |  |  |  |
Net gain arising during the period | 51 |  |  | 20 |  |  | 31 |
Amortization of net actuarial loss recognized in net periodic pension cost(2) | 480 |  |  | 178 |  |  | 302 |
Reclassification of adjustment for net settlement gain realized in net income(2) | (383 | ) |  | (148 | ) |  | (235 | )
Total defined benefit pension and post-retirement benefit plans | 148 |  |  | 50 |  |  | 98 |
Total other comprehensive loss | $ | (10,400 | ) |  | $ | (4,031 | ) |  | $ | (6,369 | )
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Year Ended December 31, 2015 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (571 | ) |  | $ | (220 | ) |  | $ | (351 | )
Reclassification adjustment for gains realized in net income(1) | (96 | ) |  | (37 | ) |  | (59 | )
Amortization of unrealized holding gains on securities transferred to the held to maturity category | (178 | ) |  | (68 | ) |  | (110 | )
Total securities available for sale | (845 | ) |  | (325 | ) |  | (520 | )
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (420 | ) |  | (171 | ) |  | (249 | )
Total derivative instruments | (420 | ) |  | (171 | ) |  | (249 | )
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Net loss arising during the period | (2,393 | ) |  | (958 | ) |  | (1,435 | )
Amortization of net actuarial loss recognized in net periodic pension cost(2) | 432 |  |  | 165 |  |  | 267 |
Total defined benefit pension and post-retirement benefit plans | (1,961 | ) |  | (793 | ) |  | (1,168 | )
Total other comprehensive loss | $ | (3,226 | ) |  | $ | (1,289 | ) |  | $ | (1,937 | )
(1) Included in Net gains on sales of securities in the Consolidated Statements of Income (2) Included in Salaries and employee benefits in the Consolidated Statements of Income The accumulated balances for each component of other comprehensive income, net of tax, at December 31 were as follows:
| 2017 |  | 2016 |  | 2015
Unrealized gains on securities | $ | 7,363 |  |  | $ | 9,490 |  |  | $ | 16,500 |
Non-credit related portion of other-than-temporary impairment on securities | (9,313 | ) |  | (16,719 | ) |  | (16,735 | )
Unrealized losses on derivative instruments | (995 | ) |  | (1,355 | ) |  | (1,882 | )
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations | (7,566 | ) |  | (7,320 | ) |  | (7,418 | )
Total accumulated other comprehensive loss | $ | (10,511 | ) |  | $ | (15,904 | ) |  | $ | (9,535 | )

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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- References No definition available. + Details
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