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v3.23.1

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended
--- | --- | ---
May 02, 2023 | Mar. 31, 2023 | Mar. 31, 2022
Dividends declared (in dollars per share) |  | $ 0.54 | $ 0.53
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |
Balance, Beginning of Period |  | $ (836,955) | $ 72,371
Net change in unrealized gain (loss) |  | 124,045 | (639,041)
Gain on available for sale securities, net |  | 0 | (937)
Interest revenue, Investment securities |  | 16,051 | 0
Other comprehensive income, before income taxes |  | 140,096 | (639,978)
Federal and state income taxes |  | 31,695 | (149,781)
Other comprehensive income, net of income taxes |  | 108,401 | (490,197)
Balance, End of Period |  | (728,554) | (417,826)
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member] |  |  |
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |
Balance, Beginning of Period |  | (664,618) | 69,775
Net change in unrealized gain (loss) |  | 124,045 | (639,041)
Gain on available for sale securities, net |  |  | (937)
Interest revenue, Investment securities |  | 0 |
Other comprehensive income, before income taxes |  | 124,045 | (639,978)
Federal and state income taxes |  | 28,179 | (149,781)
Other comprehensive income, net of income taxes |  | 95,866 | (490,197)
Balance, End of Period |  | (568,752) | (420,422)
AOCI, Accumulated Gain (Loss), Debt Securities, Investment Securities Transferred from Available-for-sale, Parent |  |  |
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |
Balance, Beginning of Period |  | (172,337) | 0
Net change in unrealized gain (loss) |  | 0 | 0
Gain on available for sale securities, net |  |  | 0
Interest revenue, Investment securities |  | 16,051 |
Other comprehensive income, before income taxes |  | 16,051 | 0
Federal and state income taxes |  | 3,516 | 0
Other comprehensive income, net of income taxes |  | 12,535 | 0
Balance, End of Period |  | (159,802) | 0
Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member] |  |  |
Schedule of Accumulated Other Income (Loss) [Abstract] |  |  |
Balance, Beginning of Period |  | 0 | 2,596
Net change in unrealized gain (loss) |  | 0 | 0
Gain on available for sale securities, net |  |  | 0
Interest revenue, Investment securities |  | 0 |
Other comprehensive income, before income taxes |  | 0 | 0
Federal and state income taxes |  | 0 | 0
Other comprehensive income, net of income taxes |  | 0 | 0
Balance, End of Period |  | $ 0 | $ 2,596
Subsequent Event [Member] |  |  |
Dividends Payable, Date Declared | May 02, 2023 |  |
Dividends declared (in dollars per share) | $ 0.54 |  |
Dividends Payable, Date to be Paid | May 30, 2023 |  |
Dividends Payable, Date of Record | May 15, 2023 |  |

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- Definition Amount, before tax, of adjustment from accumulated other comprehensive income (loss) for amortization of gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from transfer to investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 10B -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124260725&loc=SL120268667-111560 + Details
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