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Stock Compensation Plans (Tables)
6 Months Ended
Jun. 30, 2021
Stock Compensation Plans [Abstract]  
Equity Award Grants
Charter granted the following equity awards for the periods presented.

Three Months Ended June 30, Six Months Ended June 30,
2021202020212020
Stock options16,800 11,600 1,241,800 1,265,300 
Restricted stock4,600 6,000 4,600 6,000 
Restricted stock units9,100 7,600 354,200 415,900