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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The following table summarizes activity under the Plans relating to stock options:
Stock Options
Number of
Shares
 
Weighted Average
Exercise Price
 
Weighted Average
Remaining
Contractual Term
(in years)
 
Aggregate
Intrinsic Value
as of 12/31/11
(in thousands)
Outstanding at January 1, 2011
221,148

 
$
14.16

 
2.70

 
$
6,165

Forfeited
(5,000
)
 
6.49

 
 

 
 

Exercised
(71,450
)
 
18.85

 
 

 
 

Outstanding, exercisable and vested at December 31, 2011
144,698

 
$
12.12

 
2.32

 
$
7,468
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
The following table summarizes information about restricted stock awards for the year ended December 31, 2011:
Restricted Stock
Number of
Shares
 
Weighted Average
Grant-Date
Fair Value
Unvested at January 1, 2011
161,618

 
$
29.03

Granted
205,671

 
50.67

Vested
(58,238
)
 
29.39

Unvested at December 31, 2011
309,051

 
$
43.36
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
The following table summarizes information about performance stock awards for the year ended December 31, 2011:
Performance Stock
Number of
Shares
 
Weighted Average
Grant-Date
Fair Value
Unvested at January 1, 2011
307,510

 
$
25.60

Granted
73,499

 
50.87

Vested
(263,386
)
 
26.03

Forfeited
(4,700
)
 
25.00

Unvested at December 31, 2011
112,923

 
$
41.09