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Operations and Significant Accounting Policies (Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Earnings per share:      
Net income $ 62,542 $ 9,517 $ 28,620
Basic-weighted average shares outstanding (in shares) 29,162 28,581 28,325
Effect of dilutive potential securities (in shares) 3,054 883 1,170
Diluted-weighted average shares outstanding (in shares) 32,216 29,464 29,495
Basic EPS (in dollars per share) $ 2.14 $ 0.33 $ 1.01
Diluted EPS (in dollars per share) $ 1.94 $ 0.32 $ 0.97
Shares excluded from computation of earnings per share 600 1,400 700
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities 1,300    
Incremental Common Shares Attributable to Dilutive Effect of Warrants 500