Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

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

	Shares Outstanding			Weighted Average Grant Date  Fair Value
Unvested restricted stock at January 1, 2012		216,920		$	21.74
Restricted stock granted		94,850			24.40
Restricted stock vested		(55,870	)		21.87
Restricted stock forfeited		(5,720	)		24.32
Unvested restricted stock at September 30, 2012		250,180		$	22.66