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Other Comprehensive Income | 12 Months Ended
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Dec. 31, 2020
Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) Other comprehensive income (loss) components, net of income tax, are shown in the following table for the years ended December 31, 2020, 2019 and 2018.
Year ended December 31, (in thousands) |  | Changes in Pension Plan assets and benefit obligations |  | Unrealized gains (losses) on AFS debt securities |  | Unrealized net holding loss on cash flow hedge |  | Total
Beginning balance at January 1, 2020 |  | $ | (26,674) |  |  | $ | 17,539 |  |  | $ | (454) |  |  | $ | (9,589) |
| Other comprehensive (loss) income before reclassifications |  | (8,675) |  |  | 25,747 |  |  | (244) |  |  | $ | 16,828 |
| Amounts reclassified from accumulated other comprehensive loss (income) |  | 928 |  |  | (2,596) |  |  | — |  |  | $ | (1,668) |
Net current period other comprehensive (loss) income |  | $ | (7,747) |  |  | $ | 23,151 |  |  | $ | (244) |  |  | $ | 15,160 |
Ending balance at December 31, 2020 |  | $ | (34,421) |  |  | $ | 40,690 |  |  | $ | (698) |  |  | $ | 5,571 |
Beginning balance at January 1, 2019 |  | $ | (29,672) |  |  | $ | (20,116) |  |  | $ | — |  |  | $ | (49,788) |
| Other comprehensive income (loss) before reclassifications (1) |  | 1,511 |  |  | 37,322 |  |  | (454) |  |  | $ | 38,379 |
| Amounts reclassified from accumulated other comprehensive loss |  | 1,487 |  |  | 333 |  |  | — |  |  | $ | 1,820 |
Net current period other comprehensive income (loss) |  | $ | 2,998 |  |  | $ | 37,655 |  |  | $ | (454) |  |  | $ | 40,199 |
Ending balance at December 31, 2019 |  | $ | (26,674) |  |  | $ | 17,539 |  |  | $ | (454) |  |  | $ | (9,589) |
Beginning balance at January 1, 2018, as previously presented |  | $ | (23,526) |  |  | $ | (2,928) |  |  | $ | — |  |  | $ | (26,454) |
| Cumulative effect of change in accounting principle for marketable equity securities, net of tax |  | — |  |  | (995) |  |  | — |  |  | (995) |
Beginning balance at January 1, 2018, as adjusted |  | (23,526) |  |  | (3,923) |  |  | — |  |  | (27,449) |
| Reclassification of disproportionate income tax effects |  | (3,175) |  |  | (631) |  |  | — |  |  | (3,806) |
Net current period activity |  |  |  |  |  |  |  |
| Other comprehensive loss before reclassifications |  | (4,046) |  |  | (17,586) |  |  | — |  |  | (21,632) |
| Amounts reclassified from accumulated other comprehensive loss |  | 1,075 |  |  | 2,024 |  |  | — |  |  | 3,099 |
Net current period other comprehensive loss |  | (2,971) |  |  | (15,562) |  |  | — |  |  | (18,533) |
Ending balance at December 31, 2018 |  | $ | (29,672) |  |  | $ | (20,116) |  |  | $ | — |  |  | $ | (49,788) |
(1) During the year ended December 31, 2019, Park transferred HTM securities with a fair value of $373.9 million to AFS classification. The transfer occurred at fair value and had a related unrealized gain of $24.2 million ($19.1 million net of taxes), recorded in other comprehensive income. The following table provides information concerning amounts reclassified out of accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018:
|  | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Affected Line Item in the Consolidated Statements of Income
(In thousands) |  | 2020 | 2019 | 2018 |  |
Amortization of defined benefit pension items |  |  |  |  |  |
| Amortization of net loss |  | $ | 1,175 |  | 1,882 |  | 1,361 |  |  | Employee benefits
Income before income taxes |  | 1,175 |  | 1,882 |  | 1,361 |  |  | Income before income taxes
| Income taxes |  | 247 |  | 395 |  | 286 |  |  | Income taxes
| Net of income tax |  | $ | 928 |  | $ | 1,487 |  | $ | 1,075 |  |  | Net income
Unrealized gains & losses on AFS debt securities |  |  |  |  |  |
| (Gain) loss on the sale of debt securities |  | $ | (3,286) |  | $ | 421 |  | $ | 2,562 |  |  | Net gain (loss) on the sale of debt securities
(Income) loss before income taxes |  | (3,286) |  | 421 |  | 2,562 |  |  | Income before income taxes
| Income tax (benefit) expense |  | (690) |  | 88 |  | 538 |  |  | Income taxes
| Net of income (benefit) tax |  | $ | (2,596) |  | $ | 333 |  | $ | 2,024 |  |  | Net income

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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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