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Earnings per Share Earnings per Share (Tables)
 3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Schedule of Weighted Average Number of Shares [Table Text Block] The following table summarizes the dilutive effect of RSUs and options to purchase common stock for the three months ended March 31, 2022 and 2021:
Three months ended
March 31,
20222021
Weighted average common shares—basic42,799,206 43,185,007 
Dilutive effect of restricted stock units310,487 400,685 
Dilutive effect of stock options— 49,184 
Weighted average common shares—diluted43,109,693 43,634,876