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Stock Compensation Plans (Tables)
9 Months Ended
Sep. 30, 2022
Stock Compensation Plans [Abstract]  
Equity Award Grants
Charter granted the following equity awards for the periods presented.

Three Months Ended September 30, Nine Months Ended September 30,
2022202120222021
Stock options50,700 36,900 1,455,100 1,278,700 
Restricted stock— — 6,800 4,600 
Restricted stock units175,600 8,900 618,700 363,100