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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2023
Stockholders' Equity Note [Abstract] |
Components of Accumulated Other Comprehensive Income (Loss) | A roll-forward of the components of Accumulated Other Comprehensive Income (Loss) is presented in the table that follows:
﻿ | Available for Sale Securities |  | HTM Securities Transferred from AFS |  | Employee Benefit Plans |  | Cash Flow Hedges |  | Equity Method Investment |  | Total |
($ in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Balance, December 31, 2021 | $ | 11,037 |  | $ | 153 |  | $ | (80,946 | ) | $ | 16,284 |  | $ | (463 | ) | $ | (53,935 | )
Net change in unrealized gain (loss) |  | (547,636 | ) |  | — |  |  | — |  |  | (47,287 | ) |  | 468 |  |  | (594,455 | )
Reclassification of net income or loss realized and included in earnings |  | 1,707 |  |  | — |  |  | 1,652 |  |  | (12,767 | ) |  | — |  |  | (9,408 | )
Valuation adjustments to employee benefit plans |  | — |  |  | — |  |  | (7,987 | ) |  | — |  |  | — |  |  | (7,987 | )
Transfer of net unrealized loss from AFS to HTM securities portfolio |  | 15,405 |  |  | (15,405 | ) |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unrealized net loss on securities transferred to HTM |  | — |  |  | 527 |  |  | — |  |  | — |  |  | — |  |  | 527 |
Income tax benefit |  | 119,739 |  |  | 3,358 |  |  | 1,430 |  |  | 13,554 |  |  | — |  |  | 138,081 |
Balance, June 30, 2022 | $ | (399,748 | ) | $ | (11,367 | ) | $ | (85,851 | ) | $ | (30,216 | ) | $ | 5 |  | $ | (527,177 | )
Balance, December 31, 2022 | $ | (584,408 | ) | $ | (10,734 | ) | $ | (97,952 | ) | $ | (79,093 | ) | $ | 5 |  | $ | (772,182 | )
Net change in unrealized gain (loss) |  | 17,678 |  |  | — |  |  | — |  |  | (20,943 | ) |  | 706 |  |  | (2,559 | )
Reclassification of net loss realized and included in earnings |  | — |  |  | — |  |  | 3,272 |  |  | 17,493 |  |  | — |  |  | 20,765 |
Valuation adjustments to employee benefit plans |  | — |  |  | — |  |  | (7,521 | ) |  | — |  |  | — |  |  | (7,521 | )
Amortization of unrealized net loss on securities transferred to HTM |  | — |  |  | 922 |  |  | — |  |  | — |  |  | — |  |  | 922 |
Income tax (expense) benefit |  | (3,737 | ) |  | (207 | ) |  | 956 |  |  | 777 |  |  | — |  |  | (2,211 | )
Balance, June 30, 2023 | $ | (570,467 | ) | $ | (10,019 | ) | $ | (101,245 | ) | $ | (81,766 | ) | $ | 711 |  | $ | (762,786 | )
Line Items in Consolidated Income Statements Affected by Amounts Reclassified from Accumulated Other Comprehensive Income | The following table shows the line items in the consolidated statements of income affected by amounts reclassified from AOCI.
﻿ |  | Six Months Ended |  |  |
Amount reclassified from AOCI (a) |  | June 30, |  |  | Affected line item on
($ in thousands) |  | 2023 |  |  | 2022 |  |  | the statement of income
Loss on sale of AFS securities |  | $ | — |  |  | $ | (1,707 | ) |  | Noninterest income
Tax effect |  |  | — |  |  |  | 385 |  |  | Income taxes
Net of tax |  |  | — |  |  |  | (1,322 | ) |  | Net income
Amortization of unrealized net loss on securities transferred to HTM |  |  | (922 | ) |  |  | (527 | ) |  | Interest income
Tax effect |  |  | 207 |  |  |  | 119 |  |  | Income taxes
Net of tax |  |  | (715 | ) |  |  | (408 | ) |  | Net income
Amortization of defined benefit pension and post-retirement items |  |  | (3,272 | ) |  |  | (1,652 | ) |  | Other noninterest expense (b)
Tax effect |  |  | 736 |  |  |  | 373 |  |  | Income taxes
Net of tax |  |  | (2,536 | ) |  |  | (1,279 | ) |  | Net income
Reclassification of unrealized gain/(loss) on cash flow hedges |  |  | (21,994 | ) |  |  | 6,977 |  |  | Interest income
Tax effect |  |  | 4,953 |  |  |  | (1,575 | ) |  | Income taxes
Net of tax |  |  | (17,041 | ) |  |  | 5,402 |  |  | Net income
Amortization of gain on terminated cash flow hedges |  |  | 4,501 |  |  |  | 5,790 |  |  | Interest income
Tax effect |  |  | (1,014 | ) |  |  | (1,307 | ) |  | Income taxes
Net of tax |  |  | 3,487 |  |  |  | 4,483 |  |  | Net income
Total reclassifications, net of tax |  |  | (16,805 | ) |  |  | 6,876 |  |  | Net income
(a) Amounts in parentheses indicate reduction in net income. (b) These AOCI components are included in the computation of net periodic pension and post-retirement cost that is reported with other noninterest expense (see Note 10 – Retirement Plans for additional details).

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