Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

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,
	2019		2018		2019		2018
PUs	$	241	$	3,084	$	890	$	3,379
RSUs	2,287		2,568		4,009		5,309
Stock options	768		815		1,583		1,654
Total	$	3,296	$	6,467	$	6,482	$	10,342