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1. Significant Accounting Policies Earnings per share (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]      
Basic weighted average shares outstanding 29,785 29,831 29,768
Effect of potentially dilutive stock options and restricted stock awards 0 377 392
Weighted average common shares - diluted 29,785 30,208 30,160
Anti-dilutive shares excluded from the computation of diluted EPS 325 33 44