Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Share-based Compensation [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

The following table summarizes the components of stock-based compensation expense, all of which has been classified as selling, general and administrative expense:

	Three Months Ended				Six Months Ended
	June 30, 2015		June 30, 2014		June 30, 2015			June 30, 2014
Stock options	$	454	$	245	$	702		$	815
Restricted stock	392		261		638			557
Performance shares	46		41		(265		)	333
Stock grants	510		270		510			270
Total share-based compensation expense	$	1,402	$	817	$	1,585		$	1,975