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Note 20 - Net Earnings Per Common Share - Reconciliation of the Denominator Used to Calculate Earnings Per Common Share (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Net earnings attributable to Company $ 49,074 $ 102,903
Adjusted numerator under the If-Converted Method $ 49,074 $ 102,903
Shares issued and outstanding at beginning of period (in shares) 39,845,211 39,213,136
Issued during the period (in shares) 140,657 336,426
Weighted average number of shares used in computing basic earnings per share (in shares) 39,985,868 39,549,562
Assumed exercise of stock options acquired under the Treasury Stock Method (in shares) 193,296 431,456
Number of shares used in computing diluted earnings per share (in shares) 40,179,164 39,981,018