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Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-based Payment Arrangement, Cost by Plan [Table Text Block] | The following table summarizes share-based compensation expense:
($ in thousands) | 2022 |  | 2021 |  | 2020
Performance stock units | $ | 2,391 |  |  | $ | 1,777 |  |  | $ | 1,097 |
Restricted stock units | 4,156 |  |  | 3,109 |  |  | 2,613 |
Stock options | 916 |  |  | 396 |  |  | — |
Employee stock purchase plan | 543 |  |  | 735 |  |  | 468 |
Total share-based compensation expense | $ | 8,006 |  |  | $ | 6,017 |  |  | $ | 4,178 |
Outstanding Long Term Incentive Awards [Table Text Block] | Information related to the outstanding grants at December 31, 2022 is shown below:
($ in thousands) | 2020 - 2022 Cycle |  | 2021 - 2023 Cycle |  | 2022 - 2024 Cycle
Shares issuable at target | 24,674 |  |  | 38,412 |  |  | 41,765 |
Maximum shares issuable | 49,348 |  |  | 76,824 |  |  | 83,530 |
Unrecognized compensation cost | $ | 42 |  |  | $ | 981 |  |  | $ | 2,301 |
Weighted average grant date fair value | $ | 38.09 |  |  | $ | 47.16 |  |  | $ | 51.91 |
Schedule of Various Information | At December 31, 2022 and 2021, the Company has reserved the following shares of its authorized but unissued common stock for possible future issuance in connection with the following:
| December 31, 2022 |  | December 31, 2021
Outstanding performance units (maximum issuance) | 209,702 |  |  | 169,244 |
Outstanding RSU’s | 269,868 |  |  | 181,657 |
Outstanding options | 222,032 |  |  | 112,927 |
2018 Stock Incentive Plan | 342,157 |  |  | 670,326 |
Non-Management Director Plan | 55,878 |  |  | 73,618 |
2018 Employee Stock Purchase Plan | 515,941 |  |  | 571,064 |
Total | 1,615,578 |  |  | 1,778,836 |
Summary of Employee Stock Option and SSARs Activity | Following is a summary of stock option activity for 2022.
($ in thousands, except per share data) | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term
Outstanding at December 31, 2021 | 112,927 |  |  | $ | 43.80 |  |  |
Granted | 120,707 |  |  | 48.24 |  |  |
Exercised | (1,445) |  |  | 43.81 |  |  |
Forfeited | (10,157) |  |  | 45.81 |  |  |
Outstanding at December 31, 2022 | 222,032 |  |  | $ | 46.12 |  |  | 8.7 years
Exercisable at December 31, 2022 | 18,196 |  |  | $ | 43.80 |  |  | 8.2 years
Summary of Restricted Stock Units Activity | A summary of the status of the Company’s RSU awards as of December 31, 2022 and changes during the year then ended is presented below.
| Shares |  | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2021 | 181,657 |  |  | $ | 42.71 |
Granted | 180,400 |  |  | 47.96 |
Vested | (79,617) |  |  | 43.02 |
Forfeited | (12,572) |  |  | 34.99 |
Outstanding at December 31, 2022 | 269,868 |  |  | $ | 46.49 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table presents the changes in accumulated other comprehensive income (loss) after-tax by component:
($ in thousands) | Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities |  | Unamortized Gain (Loss) on Held-to-Maturity Securities |  | Net Unrealized Gain (Loss) on Cash Flow Hedges |  | Total
Balance, December 31, 2019 | $ | 14,977 |  |  | $ | 4,934 |  |  | $ | (2,162) |  |  | $ | 17,749 |
Net change | 23,627 |  |  | (1,910) |  |  | (2,346) |  |  | 19,371 |
Transfer from available-for-sale to held-to-maturity | (16,284) |  |  | 16,284 |  |  | — |  |  | — |
Balance, December 31, 2020 | $ | 22,320 |  |  | $ | 19,308 |  |  | $ | (4,508) |  |  | $ | 37,120 |
Net change | (17,049) |  |  | (3,624) |  |  | 2,330 |  |  | (18,343) |
Balance, December 31, 2021 | $ | 5,271 |  |  | $ | 15,684 |  |  | $ | (2,178) |  |  | $ | 18,777 |
Net change | (149,623) |  |  | (2,696) |  |  | 3,210 |  |  | (149,109) |
Transfer from available-for-sale to held-to-maturity | (197) |  |  | $ | 197 |  |  | $ | — |  |  | $ | — |
Balance, December 31, 2022 | $ | (144,549) |  |  | $ | 13,185 |  |  | $ | 1,032 |  |  | $ | (130,332) |
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) | The following table presents the pre-tax and after-tax changes in the components of other comprehensive income:
| 2022 |  | 2021 |  | 2020
($ in thousands) | Pre-tax |  | Tax effect |  | After-tax |  | Pre-tax |  | Tax effect |  | After-tax |  | Pre-tax |  | Tax effect |  | After-tax
Change in unrealized gain (loss) on available-for-sale securities | $ | (200,030) |  |  | $ | (50,407) |  |  | $ | (149,623) |  |  | $ | (22,701) |  |  | $ | (5,652) |  |  | $ | (17,049) |  |  | $ | 31,798 |  |  | $ | 7,854 |  |  | $ | 23,944 |
Reclassification of gain on sale of available-for-sale securities(a) | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (421) |  |  | (104) |  |  | (317) |
Reclassification of gain on held-to-maturity securities(b) | (3,605) |  |  | (909) |  |  | (2,696) |  |  | (4,672) |  |  | (1,048) |  |  | (3,624) |  |  | (2,537) |  |  | (627) |  |  | (1,910) |
Change in unrealized gain (loss) on cash flow hedges | 3,741 |  |  | 943 |  |  | 2,798 |  |  | 1,533 |  |  | 372 |  |  | 1,161 |  |  | (7,898) |  |  | (1,951) |  |  | (5,947) |
Reclassification of loss on cash flow hedges(b) | 551 |  |  | 139 |  |  | 412 |  |  | 1,543 |  |  | 374 |  |  | 1,169 |  |  | 4,782 |  |  | 1,181 |  |  | 3,601 |
Total other comprehensive income (loss) | $ | (199,343) |  |  | $ | (50,234) |  |  | $ | (149,109) |  |  | $ | (24,297) |  |  | $ | (5,954) |  |  | $ | (18,343) |  |  | $ | 25,724 |  |  | $ | 6,353 |  |  | $ | 19,371 |
(a)The pre-tax amount is reported in noninterest income/expense in the Consolidated Statements of Income. (b)The pre-tax amount is reported in interest income/expense in the Consolidated Statements of Income, except for a $3.2 million termination fee in 2020 recognized in noninterest expense.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The following weighted average assumptions were used for grants issued during the year ended December 31, 2022.
| Weighted Average
Risk Free Interest Rate | 1.95%
Expected Dividend Yield | 1.74%
Expected Volatility | 34.54%
Expected Term (years) | 6.2
Restricted Stock Units (RSUs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Various Information | Various information related to the RSUs is shown below.
($ in thousands) | 2022 |  | 2021 |  | 2020
Total fair value at vesting date | $ | 3,888 |  |  | $ | 2,855 |  |  | $ | 1,702 |
Unrecognized compensation cost | 8,507 |  |  | 4,622 |  |  | 3,899 |
Expected years to recognize unearned compensation | 2.0 years |  | 1.9 years |  | 1.9 years
Weighted average grant date fair value | $ | 47.96 |  |  | $ | 44.01 |  |  | $ | 39.63 |
Stock Plan for Non-Management Directors |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Various Information | Various information related to the Director Plan is shown below.
| 2022 |  | 2021 |  | 2020
Shares granted | 23,343 |  |  | 12,998 |  |  | 15,901 |
Weighted average grant date fair value | $ | 42.17 |  |  | $ | 46.05 |  |  | $ | 30.28 |

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