XML 70 R52.htm IDEA: XBRL DOCUMENT v3.22.0.1
Shareholders' Equity - Schedule of Shares Granted and Vested (Details) - Share Award Plans - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Shares      
Unvested shares at the beginning of the year (in shares) 434,550 227,340 161,990
Shares awarded (in shares) 838,000 420,000 202,500
Shares vested/forfeited (in shares) (426,930) (212,790) (137,150)
Unvested shares at the end of the year (in shares) 845,620 434,550 227,340
Weighted Average Award Date Fair Value      
Unvested shares at the beginning of the year (in dollars per share) $ 6.15 $ 12.52 $ 19.41
Shares awarded (in dollars per share) 3.45 3.65 8.65
Shares vested/forfeited (in dollars per share) 4.98 7.04 8.94
Unvested shares at the end of the year (in dollars per share) $ 4.07 $ 6.15 $ 12.52