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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares shares in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statement of Stockholders' Equity [Abstract] |  |  |
Dividend per share | $ 0.76 | $ 0.73 | $ 0.69
Issuance of restricted common stock | 2,880 | 17,350 | 3,416
Eexercise of stock option, shares | 6,172 | 19,030 | 3,275
Percentage of stocks dividend | 5.00% | 5.00% | 5.00%
Stock dividends | 237,569 | 225,650 | 218,589
Treasury shares |  | 106,894 |
Percentage of stocks dividend | 5.00% | 5.00% | 5.00%

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- Definition Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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