Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Share-based Compensation [Abstract]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

		Weighted-average
	Number	grant date		Aggregate		Vesting
	of shares	fair value		fair value		period
Common stock	38	$	46.41	$	1,771	None
Restricted stock	333		43.60		14,525	0 - 4 years
Restricted stock units	13		45.14		593	4 years