Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Share-Based Compensation Expense By Type [Table Text Block]

Share-based compensation expense was as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
PUs	$	145	$	241	$	219	$	890
RSUs	1,767		2,287		3,410		4,009
Stock options	649		768		1,306		1,583
Total	$	2,561	$	3,296	$	4,935	$	6,482