Stock Award Plans and Stock-Based Compensation - Employee Stock Options (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			0
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			0
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment charges	$ 200,000	$ 700,000	$ 800,000	$ 1,600,000
Fair value of non-vested options	$ 1,200,000		$ 1,200,000
Weighted average remaining term			10 months 28 days
Granted (in shares)			0
Options | 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend assumptions			$ 0