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STOCK-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2013
STOCK-BASED COMPENSATION [Abstract]  
Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions [Table Text Block]
The following are the key assumptions used in this valuation:
 
2013
 
2012
 
2011
Risk Free Interest Rate
0.37% - 0.67%

 
0.38 % - 0.40%

 
1.18
%
Expected Stock Price Volatility
33.36% - 36.11%

 
36.41% - 48.05%

 
49.2
%
Expected Service Period
3.0 years

 
3.0 years

 
2.7 years

Expected Dividend Yield (assuming full reinvestment)
%
 
%
 
%
Summary of Option Activity
A summary of the option activity is presented in the following table (dollars in thousands, except per share amounts):
 
 
Range of Per Share Exercise Price  
 
Shares Under Options
 
Weighted Average Exercise Price Per Share
 
Weighted Average Remaining Contractual Term (Years)
 
Aggregate Intrinsic Value
Outstanding as of December 31, 2012
 
$14.37 - $21.83
 
362,770

 
$
18.97

 
2.7
 
$
1,011

Granted
 
 

 

 
 
 
 
Exercised
 
$14.37 - $21.83
 
(298,484
)
 
19.35

 
 
 
 
Forfeited
 
 

 

 
 
 
 
 
 
 
 
 
 
 

 
 
 
 

Outstanding as of December 31, 2013
 
$17.17 - $17.31
 
64,286

 
$
17.22

 
2.9
 
$
574

 
 
 
 
 
 
 

 
 
 
 

Exercisable as of December 31, 2013
 
$17.17 - $17.31
 
42,857

 
$
17.24

 
2.7
 
$
381

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The following table summarizes additional information concerning restricted stock units at December 31, 2013:
 
 
Restricted Stock Units
 
Weighted Average Grant Date Fair Value Per Unit
Unvested as of December 31, 2012
 
690,107

 
$
17.54

Granted
 
456,921

 
18.52

Vested
 
(513,750
)
 
20.83

Dividends reinvested
 
30,936

 
16.80

 
 
 
 
 
Unvested as of December 31, 2013
 
664,214

 
$
16.48