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Consolidated Statements of Equity (Parenthetical) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statement of Stockholders' Equity [Abstract] |  |  |
Tax effect of adoption of new accounting standard |  |  | $ (76)
Income Tax Effects Allocated Directly to Equity, Employee Stock Options | $ 0 | $ 0 | $ 0
Number Of Common Shares Issued For Cash | 22 | 150 | 723
Dividends declared, per common share (in dollars per share) | $ 0.705 | $ 0.70 | $ 0.685

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