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SHARE OPTION PLAN (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of share option transactions
The following summarizes share option transactions related to the Option Scheme in 2021, 2020 and 2019: 
 202120202019
 OptionsWeighted average exercise price $OptionsWeighted average exercise price $OptionsWeighted average exercise price $
Options outstanding at beginning of year1,082,500 10.56 835,000 10.72 417,500 11.43 
Granted480,000 8.79 350,000 13.45 525,000 12.19 
Exercised(129,000)7.48 (17,500)8.63 (65,000)9.92 
Forfeited— — (85,000)11.02 (42,500)11.80 
Options outstanding at end of year1,433,500 9.65 1,082,500 10.56 835,000 10.72 
Exercisable at end of year578,500 10.02 418,167 9.45 236,167 9.58