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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