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Earnings Per Share:
 9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
A reconciliation of share amounts used to compute earnings per share in the accompanying Condensed Consolidated Statements of Income was as follows (in thousands, except per share amounts):

Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Net income available for common stock$44,112 $36,283 $165,589 $150,423 
Weighted average shares - basic63,341 62,575 62,950 62,310 
Dilutive effect of:
Equity compensation95 55 96 52 
Weighted average shares - diluted63,436 62,630 63,046 62,362 
Earnings per share of common stock:
Earnings per share, Basic$0.70 $0.58 $2.63 $2.41 
Earnings per share, Diluted$0.70 $0.58 $2.63 $2.41 

The following securities were excluded from the diluted earnings per share computation because of their anti-dilutive nature (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Equity compensation9 22 12 22 
Restricted stock— 49 1 40 
Anti-dilutive shares9 71 13 62