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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Additional Paid-in Capital [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
AOCI Attributable to Parent [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2018           35,980,047        
Balance at Dec. 31, 2018 $ (390) $ (390) $ 148,707 $ 45,097 $ 45,537 $ (3,115) $ 236,226
Net earnings (loss)           (251,610) (251,610)
Other comprehensive earnings (loss)           2,659 2,659
Subsidiaries’ equity transactions             (10)     (10)
Stock option expense             8,126     8,126
Stock options exercised (in shares)           432,050        
Stock options exercised           $ 13,481 (2,424)     11,057
Dividends               (23,411)   (23,411)
Issued - settlement of LTIA (note 20) (in shares)           2,918,860        
Issued - settlement of LTIA (note 20)           $ 251,503 $ 251,503
Issued (in shares)           2,165,000       2,245,229
Issued           $ 191,737 $ 191,737
Balance (in shares) at Dec. 31, 2019           41,495,957        
Balance at Dec. 31, 2019 $ (53) $ (53) $ 605,428 50,789 (229,874) (456) 425,887
Net earnings (loss)             87,259   87,259
Other comprehensive earnings (loss)                 2,604 2,604
Subsidiaries’ equity transactions             (28)     (28)
Stock option expense             11,628     $ 11,628
Stock options exercised (in shares)           294,238       294,238
Stock options exercised           $ 14,596 (3,086)     $ 11,510
Dividends               (28,417)   $ (28,417)
Issued (in shares)           1,797,359       1,260,042
Issued           $ 150,008 $ 150,008
Balance (in shares) at Dec. 31, 2020           43,587,554        
Balance at Dec. 31, 2020           $ 770,032 $ 59,303 $ (171,085) $ 2,148 $ 660,398