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Share-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2021
Share-Based Compensation |
Schedule of stock plan activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine months ended September 30, 2021 | ​ | Nine months ended September 30, 2020
​ | ​ | ​ | ​ | Weighted- | ​ | ​ | ​ | Weighted-
​ | ​ | ​ |  | Average Grant | ​ | ​ | ​ | Average Grant
​ |  | Awards |  | Date Fair Value |  | Awards |  | Date Fair Value
Restricted Stock and Restricted Stock Unit Awards |  | ​ |  | ​ | ​ | ​ | ​ |  | ​ | ​
Outstanding at beginning of period |  | 325,030 |  | $ | 19.48 | ​ | 347,211 |  | $ | 18.64
Granted |  | 66,664 |  | ​ | 26.63 | ​ | 77,846 |  | ​ | 19.53
Vested |  | (101,108) |  | ​ | 20.46 | ​ | (87,939) |  | ​ | 16.24
Forfeited or cancelled |  | — |  | ​ | — | ​ | (7,590) |  | ​ | 19.75
Outstanding at end of period | ​ | 290,586 | ​ | $ | 20.77 | ​ | 329,528 | ​ | $ | 19.46

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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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