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Stock-Based Compensation, Non-Vested Stock Option Activity (Details) - Stock Options - $ / shares | 3 Months Ended
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Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022
Status of the Company's non-vested options and changes during the year |  |  |
Non-vested options at the beginning of the period (in shares) | 27,009,754 | 31,717,664 | 31,380,283
Non-vested options, options granted (in shares) | 143,393 | 6,389,410 | 532,721
Non-vested options, options vested (in shares) | (99,080) | (10,914,950) | (59,200)
Non-vested options, options forfeited (in shares) | (73,380) | (182,370) | (136,140)
Non-vested options at the end of the period (in shares) | 26,980,687 | 27,009,754 | 31,717,664
Weighted Average Fair Value at Grant Date |  |  |
Weighted average fair value at the grant date, Non-vested options at the beginning of the period (in dollars per share) | $ 10.98 | $ 8.50 | $ 8.34
Weighted average fair value at grant date, options granted (in dollars per share) | 16.60 | 16.68 | 17.97
Weighted average fair value at grant date, options vested (in dollars per share) | 6.60 | 7.16 | 10.69
Weighted average fair value at grant date, options forfeited (in dollars per share) | 9.87 | 8.37 | 7.68
Weighted average fair value at the grant date, Non-vested options at the end of the period (in dollars per share) | $ 11.03 | $ 10.98 | $ 8.50

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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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