Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Stock-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, 2015:

	Restricted	Performance		Weighted Average
	Stock	Stock		Grant Date
	Units	Units		Fair Value
Outstanding at December 31, 2014	108,237	71,990	$	36.25
Granted	29,656	41,114		45.00
Vested	(24,839)	(23,877)		30.27
Adjustment for incentive awards expected to vest	-	3,844		47.71
Canceled	(1,000)	-		38.44
Outstanding at June 30, 2015	112,054	93,071	$	40.87