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Stock Plans and Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of stock options and stock appreciation rights | The following table presents the activity related to stock options and SARs under all plans for the year ended December 31, 2021.
| Number of Shares/Rights | Weighted Average Exercise Price | Weighted Average Remaining Contractual Term | Aggregate Intrinsic Value
Outstanding at January 1, 2021 | 144,387 |  | $ | 50.61 |  |  |
Granted | 0 |  | 0.00 |  |  |
Exercised | (51,771) |  | 44.42 |  |  |
Forfeited | (1,136) |  | 46.28 |  |  |
Outstanding at December 31, 2021 | 91,480 |  | $ | 54.17 |  | 3.10 | $ | 2,690,855 |
Exercisable at December 31, 2021 | 85,821 |  | $ | 54.03 |  | 3.05 | $ | 2,536,421 |
Schedule of total stock options exercised | Net cash proceeds, tax benefits and intrinsic value related to total stock options, SARs, and restricted stock exercised is as follows:
(In thousands) | 2021 | 2020 | 2019
Proceeds from stock option exercises | $ | (803) |  | $ | (253) |  | $ | (992) |
Tax benefits related to stock option exercises | 355 |  | 156 |  | 944 |
Intrinsic value of stock option exercises | 1,900 |  | 570 |  | 2,460 |
Schedule of options outstanding |
December 31, 2021 |  |  |
Options and SARs Outstanding | Options and SARs Exercisable
Range of Exercise Prices | Number Outstanding | Weighted Average Remaining Contractual Life | Weighted Average Exercise Price | Number Exercisable | Weighted Average Exercise Price
$37.51-41.00 | 17,034 |  | 1.27 | $ | 40.60 |  | 17,034 |  | $ | 40.60 |
$41.01-50.00 | 33,763 |  | 2.79 | $ | 49.22 |  | 33,763 |  | $ | 49.22 |
$50.01-76.90 | 40,461 |  | 4.11 | $ | 63.84 |  | 34,802 |  | $ | 65.07 |
$76.91-86.18 | 222 |  | 4.89 | $ | 86.18 |  | 222 |  | $ | 86.18 |
| 91,480 |  | 3.10 | $ | 54.17 |  | 85,821 |  | $ | 54.03 |
Schedule of restricted stock awards | The following table presents activity related to restricted stock awards and restricted stock units for the year ended December 31, 2021.
| Number of Shares | Weighted Average Grant Date Fair Value
Unvested at January 1, 2021 | 254,989 |  | $ | 70.55 |
Granted | 67,846 |  | 83.97 |
Vested | (71,907) |  | 72.67 |
Forfeited | (9,018) |  | 70.10 |
Unvested at December 31, 2021 | 241,910 |  | $ | 71.60 |

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- Definition Tabular disclosure of cash received from exercise of stock options and similar instruments granted under share-based payment arrangements and tax benefit from exercise of stock options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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