Stock Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2018

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,
	2018	2017	2018	2017
Stock options	24,200	20,900	1,490,700	1,167,100
Restricted stock	500	—	10,200	9,500
Restricted stock units	13,500	5,100	518,900	283,000