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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2022
STOCK-BASED COMPENSATION |
Schedule of stock-based employee compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Six months ended
​ | ​ | June 30, | ​ | June 30,
(in thousands) |  | 2022 | ​ | 2021 |  | 2022 | ​ | 2021
Pre-tax expense | ​ | $ | 1,695 | ​ | $ | 1,471 | ​ | $ | 3,192 | ​ | $ | 3,010
After tax expense | ​ | $ | 1,279 | ​ | $ | 1,103 | ​ | $ | 2,409 | ​ | $ | 2,257
Schedule of summary of the changes in non-vested restricted shares | The following is a summary of the changes in non-vested restricted shares for the six months ended June 30, 2022: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ |  | Shares |  | Grant-Date Fair Value
Non-vested shares at January 1, 2022 | ​ | 2,619,691 | ​ | $ | 7.89
Granted |  | 1,254,276 |  | ​ | 6.72
Vested |  | (507,239) |  | ​ | 11.87
Forfeited |  | (63,515) |  | ​ | 5.99
Non-vested shares at June 30, 2022 |  | 3,303,213 | ​ | $ | 6.87
​

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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 (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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