Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Share-based Compensation [Abstract]

Schedule of Nonvested Share Activity [Table Text Block]

The following table summarizes the restricted stock award and performance unit award activity for the period ended June 30, 2016:

	Restricted	Performance		Weighted Average
	Stock	Stock		Grant Date
	Units	Units		Fair Value
Outstanding at December 31, 2015	93,817	35,999	$	39.66
Granted	43,283	129,844		12.59
Vested	(43,453)	-		29.30
Adjustment for incentive awards not expected to vest	-	(93,103)		24.79
Canceled	(6,021)	(9,050)		18.82
Outstanding at June 30, 2016	87,626	63,690	$	22.28