Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

				Aggregate
			Grant Date	Fair
Incentive Plan	Grant Date	Units	Fair Value	Value	Vesting Date
2010 – 2012	March 2, 2010	36,541	$31.83	$1,163,100	March 2, 2013
2011 – 2013	March 15, 2011	34,002	38.46	1,307,717	March 15, 2014
2012 – 2014	March 6, 2012	43,042	27.49	1,183,225	March 6, 2015

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

			Aggregate
		Grant Date	Fair
Grant Date	Shares	Fair Value	Value	Vesting Date
March 15, 2011	24,836	$38.46	$955,193	March 15, 2015
February 1, 2012	66,000	30.15	1,989,900	February 1, 2016
March 6, 2012	18,347	27.49	504,359	March 6, 2016
May 23, 2012	8,000	28.05	224,400	May 23, 2016

Schedule of Stock Options Roll Forward [Table Text Block]

			Weighted
		Weighted	Average
		Average	Remaining	Aggregate
		Exercise	Contractual	Intrinsic
	Shares	Price	Term	Value
Outstanding and Exercisable at January 1, 2012	39,950	$8.94	2.8
Granted	0	0	0
Canceled	0	0	0
Exercised	(1,450)	9.30	0
Outstanding and Exercisable at June 30, 2012	38,500	$8.92	2.3	$758,000