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Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]        
Stock repurchased and retired (in shares) 284 482 127,464 1,093,741
Common shares issued (in shares) 18,477 19,200 19,081 19,491
Non-vested common shares issued (in shares)   733 239,525 328,100
Non-vested common shares forfeited (in shares) 8,305 23,018 27,373 25,588
stock options exercised (in shares)   10,917 40,663 84,268
Shares tendered (in shares)   2,949 6,177 26,124
Common dividends (in dollars per share) $ 0.41 $ 0.34 $ 0.82 $ 1.28