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Equity Weighted Average Shares Outstanding (Tables)
3 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Schedule of Weighted Average Number of Shares The following table sets forth, for the indicated periods, weighted averages of the number of common shares outstanding, basic and dilutive, the effect of dilutive options and the number of options which are not dilutive because the average price of the Company's common stock was less than the exercise prices. The treasury stock method was used to measure the effect of the dilution.
 Three months ended March 31,
(In thousands)20212020
Weighted average common stock outstanding-Basic23,542 23,295 
Effect of dilutive options— 
Weighted average common stock outstanding-Diluted23,542 23,299 
Non-dilutive options 1,423 1,224 
Years non-dilutive options were issued2011 through 20202014 through 2019