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Stock Compensation (Schedule of Stock Grant Activity for RSUs) (Details) - Restricted Stock Units (RSUs) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Shares        
Unvested, Beginning Balance, Shares 224,000 212,000 226,000  
Granted, Shares 643,000 144,000 141,000  
Vested, Shares (100,000) (93,000) (118,000)  
Forfeited, Shares (33,000) (39,000) (37,000)  
Unvested, Ending Balance, Shares 734,000 224,000 212,000 226,000
Vested and expected to vest, Shares 734,000      
Outstanding, Weighted Average Remaining Contractual Term in Years 2 years 7 days 11 months 8 days 1 year 7 days 11 months 4 days
Vested and expected to vest, Weighted Average Remaining Contractual Term in Years 2 years 7 days      
Outstanding, Aggregate Intrinsic Value $ 8,895,000 $ 4,558,000 $ 5,015,000 $ 6,131,000
Vested and expected to vest, Aggregate Intrinsic Value $ 8,895,000