Long-term Incentive Compensation Plans (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Units granted to employees and Eligible Directors (in units)	500,000	1,900,000
Units issued upon exercise of options (in units)	5,182	400,000
Proceeds from stock options exercised	$ 147	$ 9,642

Number of share options (or share units) exercised during the current period.

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