Employee Termination Benefits (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Employee Termination Benefits
Cash	$ 32	$ 3,214
Share-Based Compensation	$ 17	$ 40
Number of Shares (in shares)	0	4
Total Employee Termination Benefits	$ 49	$ 3,254
Executive Employee Termination Benefits
Employee Termination Benefits
Cash	0	3
Share-Based Compensation	$ 0	$ 0
Number of Shares (in shares)	0	0
Total Employee Termination Benefits	$ 0	$ 3
Other Employee Termination Benefits
Employee Termination Benefits
Cash	32	3,211
Share-Based Compensation	$ 17	$ 40
Number of Shares (in shares)	0	4
Total Employee Termination Benefits	$ 49	$ 3,251