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STOCK OPTION PLANS (Tables)
 12 Months Ended
Dec. 31, 2011
STOCK OPTION PLANS [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
The following is a summary of activity in the stock option plans for 2011:
 
Shares Subject
to Option
 
Weighted- Average
Exercise Price
 
Weighted- Average Remaining Contractual Life (in Years)
 
Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2010
829,224

 
$
13.75

 
 
 
 
Granted
492,500

 
22.10

 
 
 
 
Exercised
(69,375
)
 
7.56

 
 
 
 
Forfeited/Expired
(18,298
)
 
15.75

 
 
 
 
Outstanding, December 31, 2011
1,234,051

 
17.40

 
8.11
 
$
3,842

Exercisable, December 31, 2011
495,805

 
14.53

 
6.00
 
$
2,782
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Weighted average assumptions used for stock options issued in 2011 and 2010 (no options were issued in 2009):
 
2011
 
2010
Expected life (in years)
6.0

 
6.1

Expected volatility
65.8
%
 
55.5
%
Expected dividends
0.1
%
 
—

Risk-free interest rate
1.21
%
 
1.82
%