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Other Comprehensive Income (Loss) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Other Comprehensive Income (Loss) | OTHER COMPREHENSIVE INCOME (LOSS) The following tables present a reconciliation of the changes in the components of other comprehensive income and loss for the periods indicated, including the amount of tax (expense) benefit allocated to each component:
|  | For The Year Ended December 31,
|  | 2020 |  | 2019 |  | 2018
(In thousands) |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount
AFS Debt Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gain (loss) |  | $ | 33,198 |  |  | $ | (7,138) |  |  | $ | 26,060 |  |  | $ | 26,743 |  |  | $ | (5,750) |  |  | $ | 20,993 |  |  | $ | (10,846) |  |  | $ | 2,332 |  |  | $ | (8,514) |
Less: reclassification adjustment for net realized (loss) gain(1) |  | — |  |  | — |  |  | — |  |  | (105) |  |  | 22 |  |  | (83) |  |  | (663) |  |  | 142 |  |  | (521) |
Net unrealized gain (loss) |  | 33,198 |  |  | (7,138) |  |  | 26,060 |  |  | 26,848 |  |  | (5,772) |  |  | 21,076 |  |  | (10,183) |  |  | 2,190 |  |  | (7,993) |
Cash Flow Hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net increase (decrease) in fair value |  | 1,214 |  |  | (260) |  |  | 954 |  |  | (2,973) |  |  | 639 |  |  | (2,334) |  |  | 1,066 |  |  | (229) |  |  | 837 |
Less: reclassified AOCI gain (loss) into interest expense(2) |  | (1,603) |  |  | 345 |  |  | (1,258) |  |  | (707) |  |  | 151 |  |  | (556) |  |  | (831) |  |  | 179 |  |  | (652) |
Less: reclassified AOCI gain (loss) into interest income(3) |  | 1,006 |  |  | (216) |  |  | 790 |  |  | (214) |  |  | 47 |  |  | (167) |  |  | — |  |  | — |  |  | — |
Net increase (decrease) in fair value |  | 1,811 |  |  | (389) |  |  | 1,422 |  |  | (2,052) |  |  | 441 |  |  | (1,611) |  |  | 1,897 |  |  | (408) |  |  | 1,489 |
Postretirement Plans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial (loss) gain |  | (1,282) |  |  | 277 |  |  | (1,005) |  |  | (1,918) |  |  | 412 |  |  | (1,506) |  |  | 1,743 |  |  | (375) |  |  | 1,368 |
Less: Amortization of net actuarial loss(4) |  | (701) |  |  | 151 |  |  | (550) |  |  | (271) |  |  | 59 |  |  | (212) |  |  | (613) |  |  | 131 |  |  | (482) |
Less: Amortization of net prior service credits(4) |  | 24 |  |  | (5) |  |  | 19 |  |  | 24 |  |  | (5) |  |  | 19 |  |  | 24 |  |  | (5) |  |  | 19 |
Net loss on postretirement plans |  | (605) |  |  | 131 |  |  | (474) |  |  | (1,671) |  |  | 358 |  |  | (1,313) |  |  | 2,332 |  |  | (501) |  |  | 1,831 |
Other comprehensive income |  | $ | 34,404 |  |  | $ | (7,396) |  |  | $ | 27,008 |  |  | $ | 23,125 |  |  | $ | (4,973) |  |  | $ | 18,152 |  |  | $ | (5,954) |  |  | $ | 1,281 |  |  | $ | (4,673) |
(1) Reclassified into net (loss) gain on sale of securities on the consolidated statements of income. (2) Reclassified into interest on deposits, borrowings and subordinated debentures on the consolidated statements of income. (3) Reclassified into interest and fees on loans on the consolidated statements of income. (4) Reclassified into salaries and employee benefits and other expenses on the consolidated statements of income. Refer to Note 18 of the consolidated financial statements for further details. The following table presents the changes in each component of AOCI for the periods indicated:
(In thousands) |  | Net Unrealized (Losses) Gains on AFS Debt Securities(1) |  | Net Unrealized (Losses) Gains on Cash Flow Hedges(1) |  | Defined Benefit Postretirement Plans(1) |  | AOCI(1)
Balance at December 31, 2017 |  | $ | (10,300) |  |  | $ | (5,926) |  |  | $ | (3,988) |  |  | $ | (20,214) |
Other comprehensive (loss) gain before reclassifications |  | (8,514) |  |  | 837 |  |  | 1,368 |  |  | (6,309) |
Less: Amounts reclassified from AOCI |  | (521) |  |  | (652) |  |  | (463) |  |  | (1,636) |
Other comprehensive (loss) income |  | (7,993) |  |  | 1,489 |  |  | 1,831 |  |  | (4,673) |
Net amount reclassified to AOCI related to adoption of ASU 2016-01 and ASU 2017-12 |  | 467 |  |  | — |  |  | — |  |  | 467 |
Balance at December 31, 2018 |  | (17,826) |  |  | (4,437) |  |  | (2,157) |  |  | (24,420) |
Other comprehensive income (loss) before reclassifications |  | 20,993 |  |  | (2,334) |  |  | (1,506) |  |  | 17,153 |
Less: Amounts reclassified from AOCI |  | (83) |  |  | (723) |  |  | (193) |  |  | (999) |
Other comprehensive income (loss) |  | 21,076 |  |  | (1,611) |  |  | (1,313) |  |  | 18,152 |
Balance at December 31, 2019 |  | 3,250 |  |  | (6,048) |  |  | (3,470) |  |  | (6,268) |
Other comprehensive income (loss) before reclassifications |  | 26,060 |  |  | 954 |  |  | (1,005) |  |  | 26,009 |
Less: Amounts reclassified from AOCI |  | — |  |  | (468) |  |  | (531) |  |  | (999) |
Other comprehensive income (loss) |  | 26,060 |  |  | 1,422 |  |  | (474) |  |  | 27,008 |
Balance at December 31, 2020 |  | $ | 29,310 |  |  | $ | (4,626) |  |  | $ | (3,944) |  |  | $ | 20,740 |
(1) All amounts are net of tax.

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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 http://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 http://asc.fasb.org/extlink&oid=120395209&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 http://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 http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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