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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2022
Stockholders Equity Note [Abstract] |
Components of Accumulated Other Comprehensive Income (Loss) |
﻿ |  | Available for Sale Securities |  |  | HTM Securities Transferred from AFS |  |  | Employee Benefit Plans |  |  | Cash Flow Hedges |  |  | Equity Method Investment |  |  | Total |
(in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, December 31, 2020 |  | $ | 171,224 |  |  | $ | 276 |  |  | $ | (125,573 | ) |  | $ | 39,511 |  |  | $ | (5,369 | ) |  | $ | 80,069 |
Net change in unrealized gain or loss |  |  | (141,800 | ) |  | — |  |  | — |  |  |  | (4,152 | ) |  |  | 462 |  |  |  | (145,490 | )
Reclassification of net income or loss realized and included in earnings |  | — |  |  | — |  |  |  | 1,954 |  |  |  | (6,136 | ) |  |  | 4,468 |  |  |  | 286 |
Amortization of unrealized net gain on securities transferred to HTM |  | — |  |  |  | (56 | ) |  | — |  |  | — |  |  |  | — |  |  |  | (56 | )
Income tax expense (benefit) |  |  | (31,862 | ) |  |  | (13 | ) |  |  | 439 |  |  |  | (2,312 | ) |  |  | — |  |  |  | (33,748 | )
Balance, March 31, 2021 |  | $ | 61,286 |  |  | $ | 233 |  |  | $ | (124,058 | ) |  | $ | 31,535 |  |  | $ | (439 | ) |  | $ | (31,443 | )
Balance, December 31, 2021 |  | $ | 11,037 |  |  | $ | 153 |  |  | $ | (80,946 | ) |  | $ | 16,284 |  |  | $ | (463 | ) |  | $ | (53,935 | )
Net change in unrealized gain or loss |  |  | (358,190 | ) |  |  | — |  |  |  | — |  |  |  | (33,182 | ) |  |  | 468 |  |  |  | (390,904 | )
Reclassification of net income or loss realized and included in earnings |  |  | 1,707 |  |  |  | — |  |  |  | 1,209 |  |  |  | (6,754 | ) |  |  | — |  |  |  | (3,838 | )
Transfer of net unrealized loss from AFS to HTM securities portfolio |  |  | 15,405 |  |  |  | (15,405 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unrealized net gain or loss on securities transferred to HTM |  |  | — |  |  |  | 261 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 261 |
Income tax expense (benefit) |  |  | (76,981 | ) |  |  | (3,418 | ) |  |  | 273 |  |  |  | (9,014 | ) |  |  | — |  |  |  | (89,140 | )
Balance, March 31, 2022 |  | $ | (253,060 | ) |  | $ | (11,573 | ) |  | $ | (80,010 | ) |  | $ | (14,638 | ) |  | $ | 5 |  |  | $ | (359,276 | )
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.
﻿ |  | Three Months Ended |  |  |
Amount reclassified from AOCI (a) |  | March 31, |  |  | Affected line item on
(in thousands) |  | 2022 |  |  | 2021 |  |  | 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 gain (loss) on securities transferred to HTM |  |  | (261 | ) |  |  | 56 |  |  | Interest income
Tax effect |  |  | 59 |  |  |  | (13 | ) |  | Income taxes
Net of tax |  |  | (202 | ) |  |  | 43 |  |  | Net income
Amortization of defined benefit pension and post-retirement items |  |  | (1,209 | ) |  |  | (1,954 | ) |  | Other noninterest expense (b)
Tax effect |  |  | 273 |  |  |  | 439 |  |  | Income taxes
Net of tax |  |  | (936 | ) |  |  | (1,515 | ) |  | Net income
Reclassification of unrealized gain on cash flow hedges |  |  | 3,875 |  |  |  | 6,136 |  |  | Interest income
Tax effect |  |  | (875 | ) |  |  | (1,379 | ) |  | Income taxes
Net of tax |  |  | 3,000 |  |  |  | 4,757 |  |  | Net income
Amortization of gain (loss) on terminated cash flow hedges |  |  | 2,879 |  |  |  | — |  |  | Interest income
Tax effect |  |  | (650 | ) |  |  | — |  |  | Income taxes
Net of tax |  |  | 2,229 |  |  |  | — |  |  | Net income
Reclassification of unrealized loss on equity method investment |  |  | (468 | ) |  |  | (4,468 | ) |  | Noninterest income
Tax effect |  |  | — |  |  |  | — |  |  | Income taxes
Net of tax |  |  | (468 | ) |  |  | (4,468 | ) |  | Net income
Total reclassifications, net of tax |  | $ | 2,301 |  |  | $ | (1,183 | ) |  | Net income
(a) Amounts in parentheses indicate reduction in net income.

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