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Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2013
Share-based Compensation [Abstract]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Restricted stock activity under the Company's 2007 Plan was as follows for the three months ended March 31, 2013:
(shares)
Employees
 
Directors
 
Total
Balance, January 1, 2013
503,440

 
458,000

 
961,440

Granted
153,088

 
162,000

 
315,088

Forfeited
(8,944
)
 
—

 
(8,944
)
Reduced for income tax obligations
(1,716
)
 
—

 
(1,716
)
Balance, March 31, 2013
645,868

 
620,000

 
1,265,868

 
 
 
 
 
 
Vested
288,320

 
449,000

 
737,320

Non-vested
357,548

 
171,000

 
528,548