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Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
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) | 2019 |  | 2018 |  | 2017
Performance stock units | $ | 1,699 |  |  | $ | 2,067 |  |  | $ | 2,451 |
Restricted stock units | 1,969 |  |  | 1,211 |  |  | 898 |
Employee stock issuance - restricted stock | — |  |  | — |  |  | 78 |
Employee stock purchase plan | 364 |  |  | 174 |  |  | — |
Total share-based compensation expense | $ | 4,032 |  |  | $ | 3,452 |  |  | $ | 3,427 |
Outstanding Long Term Incentive Awards [Table Text Block] | Information related to the outstanding grants at December 31, 2019 is shown below:
($ in thousands) | 2018 - 2020 Cycle |  | 2019 - 2021 Cycle
Shares issuable at target | 15,726 |  |  | 20,860 |
Maximum shares issuable | 31,452 |  |  | 41,720 |
Unrecognized compensation cost | $ | 440 |  |  | $ | 705 |
Weighted average grant date fair value | 50.19 |  |  | 47.46 |
Schedule of Various Information | At December 31, 2019 and 2018, 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, 2019 |  |  | December 31, 2018 |
Outstanding performance units (maximum issuance) | 73,172 |  |  | 98,279 |
Outstanding RSU’s | 117,369 |  |  | 67,027 |
Outstanding options and appreciation rights | 28,300 |  |  | 40,650 |
Future awards under 2018 Stock Incentive Plan | 521,573 |  |  | 632,246 |
Future awards under Non-Management Director Plan | 96,031 |  |  | 7,413 |
2018 Employee Stock Purchase Plan | 694,085 |  |  | 735,201 |
Total | 1,530,530 |  |  | 1,580,816 |
Summary of Employee Stock Option and SSARs Activity | Following is a summary of the employee stock option and SSAR activity for 2019.
($ in thousands, except per share data) | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at December 31, 2018 | 40,650 |  |  | $ | 10.14 |  |  |  |  |
Exercised | (12,350 | ) |  | 10.14 |  |  |  |  |
Outstanding at December 31, 2019 | 28,300 |  |  | $ | 10.14 |  |  | 0.6 years |  | $ | 1,077 |
Exercisable at December 31, 2019 | 28,300 |  |  | $ | 10.14 |  |  | 0.6 years |  | $ | 1,077 |
Summary of Restricted Stock Units Activity | A summary of the status of the Company’s RSU awards as of December 31, 2019 and changes during the year then ended is presented below
| Shares |  | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2018 | 67,027 |  |  | $ | 46.69 |
Granted | 77,227 |  |  | 45.00 |
Vested | (23,842 | ) |  | 45.38 |
Forfeited | (3,043 | ) |  | 46.04 |
Outstanding at December 31, 2019 | 117,369 |  |  | $ | 45.86 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table presents the changes in accumulated other comprehensive income (loss) after-tax:
(in thousands) | Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities |  | Unamortized Gain (Loss) on Held-to-Maturity Securities |  | Net Unrealized Loss on Cash Flow Hedges |  | Total
Balance, December 31, 2016 | $ | (1,533 | ) |  | $ | (208 | ) |  | $ | — |  |  | $ | (1,741 | )
Net change | (2,089 | ) |  | 12 |  |  | — |  |  | (2,077 | )
Balance, December 31, 2017 | (3,622 | ) |  | (196 | ) |  | — |  |  | (3,818 | )
Net change | (4,633 | ) |  | 3 |  |  | — |  |  | (4,630 | )
Adjustment for change in accounting policies | (792 | ) |  | (42 | ) |  | — |  |  | (834 | )
Balance, December 31, 2018 | (9,047 | ) |  | (235 | ) |  | — |  |  | (9,282 | )
Net change | 29,226 |  |  | (33 | ) |  | (2,162 | ) |  | 27,031 |
Transfer from available-for-sale to held-to-maturity | (5,202 | ) |  | 5,202 |  |  | — |  |  | — |
Balance, December 31, 2019 | $ | 14,977 |  |  | $ | 4,934 |  |  | $ | (2,162 | ) |  | $ | 17,749 |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
| Amounts Reclassified from Other Comprehensive Income (Loss) |  |
(in thousands) | 2019 |  | 2018 |  | 2017 |  | Affected Line Item in the Statements of Operations
Realized gain (loss) on securities available-for-sale, net | $ | (49 | ) |  | $ | 9 |  |  | $ | 22 |  |  | Noninterest income (expense)
Loss on cash flow hedges | (133 | ) |  | — |  |  | — |  |  | Interest income (expense)
Reclassifications before tax | (182 | ) |  | 9 |  |  | 22 |  |  | Total before income tax expense
Tax effect | 45 |  |  | (2 | ) |  | (9 | ) |  | Income tax (expense) benefit
Total reclassifications, net of tax | $ | (137 | ) |  | $ | 7 |  |  | $ | 13 |  |  | Net income
Stock Options and SSARs |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Various Information | Various information related to the stock options and SSARs is shown below.
($ in thousands) | 2019 |  | 2018 |  | 2017
Intrinsic value of option exercises on date of exercise | $ | 407 |  |  | $ | 2,469 |  |  | $ | 3,156 |
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) | 2019 |  | 2018 |  | 2017
Total fair value at vesting date | $ | 1,067 |  |  | $ | 1,544 |  |  | $ | 1,471 |
Total unrecognized compensation cost for nonvested stock units | 3,417 |  |  | 2,175 |  |  | 837 |
Expected years to recognize unearned compensation | 1.9 years |  |  | 2.0 years |  |  | 1.8 years |
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.
| 2019 |  | 2018 |  | 2017
Shares granted | 11,382 |  |  | 11,750 |  |  | 10,531 |
Weighted average fair value | $ | 41.63 |  |  | $ | 50.74 |  |  | $ | 42.46 |

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