XML 64 R47.htm IDEA: XBRL DOCUMENT
v3.20.4

Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Equity [Abstract] |
Component of Other Comprehensive Income (Loss) | The tax effects allocated to each component of other comprehensive income (loss) were as follows:
| Before Tax Amount |  | Tax Expense, (Benefit) |  | Net of Tax Amount
2020 |  |  |  |  |
Securities available for sale and transferred securities: |  |  |  |  |
Change in net unrealized gain/loss during the period | $ | 427,331 |  |  | $ | 89,741 |  |  | $ | 337,590 |
Change in net unrealized gain on securities transferred to held to maturity | (1,256) |  |  | (264) |  |  | (992) |
Reclassification adjustment for net (gains) losses included in net income | (108,989) |  |  | (22,888) |  |  | (86,101) |
Total securities available for sale and transferred securities | 317,086 |  |  | 66,589 |  |  | 250,497 |
Defined-benefit post-retirement benefit plans: |  |  |  |  |
Change in the net actuarial gain/loss | (11,518) |  |  | (2,419) |  |  | (9,099) |
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit) | 5,319 |  |  | 1,117 |  |  | 4,202 |
Total defined-benefit post-retirement benefit plans | (6,199) |  |  | (1,302) |  |  | (4,897) |
Total other comprehensive income (loss) | $ | 310,887 |  |  | $ | 65,287 |  |  | $ | 245,600 |
2019 |  |  |  |  |
Securities available for sale and transferred securities: |  |  |  |  |
Change in net unrealized gain/loss during the period | $ | 418,556 |  |  | $ | 87,897 |  |  | $ | 330,659 |
Change in net unrealized gain on securities transferred to held to maturity | (1,292) |  |  | (271) |  |  | (1,021) |
Reclassification adjustment for net (gains) losses included in net income | (293) |  |  | (62) |  |  | (231) |
Total securities available for sale and transferred securities | 416,971 |  |  | 87,564 |  |  | 329,407 |
Defined-benefit post-retirement benefit plans: |  |  |  |  |
Change in the net actuarial gain/loss | (3,644) |  |  | (765) |  |  | (2,879) |
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit) | 5,623 |  |  | 1,181 |  |  | 4,442 |
Total defined-benefit post-retirement benefit plans | 1,979 |  |  | 416 |  |  | 1,563 |
Total other comprehensive income (loss) | $ | 418,950 |  |  | $ | 87,980 |  |  | $ | 330,970 |
2018 |  |  |  |  |
Securities available for sale and transferred securities: |  |  |  |  |
Change in net unrealized gain/loss during the period | $ | (182,340) |  |  | $ | (38,292) |  |  | $ | (144,048) |
Change in net unrealized gain on securities transferred to held to maturity | (8,818) |  |  | (1,853) |  |  | (6,965) |
Reclassification adjustment for net (gains) losses included in net income | 156 |  |  | 33 |  |  | 123 |
Total securities available for sale and transferred securities | (191,002) |  |  | (40,112) |  |  | (150,890) |
Defined-benefit post-retirement benefit plans: |  |  |  |  |
Change in the net actuarial gain/loss | (7,225) |  |  | (1,517) |  |  | (5,708) |
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit) | 5,002 |  |  | 1,051 |  |  | 3,951 |
Total defined-benefit post-retirement benefit plans | (2,223) |  |  | (466) |  |  | (1,757) |
Total other comprehensive income (loss) | $ | (193,225) |  |  | $ | (40,578) |  |  | $ | (152,647) |
Schedule of Accumulated Other Comprehensive Income, Net of Tax | Activity in accumulated other comprehensive income, net of tax, was as follows:
| Securities Available For Sale |  | Defined Benefit Plans |  |  |  | Accumulated Other Comprehensive Income
Balance January 1, 2020 | $ | 313,304 |  |  | $ | (45,934) |  |  |  |  | $ | 267,370 |
Other comprehensive income (loss) before reclassification | 336,598 |  |  | (9,099) |  |  |  |  | 327,499 |
Reclassification of amounts included in net income | (86,101) |  |  | 4,202 |  |  |  |  | (81,899) |
Net other comprehensive income (loss) during period | 250,497 |  |  | (4,897) |  |  |  |  | 245,600 |
Balance December 31, 2020 | $ | 563,801 |  |  | $ | (50,831) |  |  |  |  | $ | 512,970 |
Balance January 1, 2019 | $ | (16,103) |  |  | $ | (47,497) |  |  |  |  | $ | (63,600) |
Other comprehensive income (loss) before reclassification | 329,638 |  |  | (2,879) |  |  |  |  | 326,759 |
Reclassification of amounts included in net income | (231) |  |  | 4,442 |  |  |  |  | 4,211 |
Net other comprehensive income (loss) during period | 329,407 |  |  | 1,563 |  |  |  |  | 330,970 |
Balance December 31, 2019 | $ | 313,304 |  |  | $ | (45,934) |  |  |  |  | $ | 267,370 |
Balance January 1, 2018 | $ | 117,230 |  |  | $ | (37,718) |  |  |  |  | $ | 79,512 |
Other comprehensive income (loss) before reclassification | (151,013) |  |  | (5,708) |  |  |  |  | (156,721) |
Reclassification of amounts included in net income | 123 |  |  | 3,951 |  |  |  |  | 4,074 |
Net other comprehensive income (loss) during period | (150,890) |  |  | (1,757) |  |  |  |  | (152,647) |
Reclassification of certain income tax effects related to the change in the U.S. statutory federal income tax rate under the Tax Cuts and Jobs Act to retained earnings | 17,557 |  |  | (8,022) |  |  |  |  | 9,535 |
Balance December 31, 2018 | $ | (16,103) |  |  | $ | (47,497) |  |  |  |  | $ | (63,600) |

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: 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=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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=121641772&loc=d3e526-108580 + Details
Name: | us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration