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COMPUTATION OF EARNINGS PER COMMON SHARE (Tables)
 3 Months Ended
Jun. 30, 2012
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings per Common Share [Table Text Block]
The following table sets forth the computation of basic and diluted earnings per common share for the three months ended June 30, 2012 and 2011:

 
 
Three Months Ended
 
 
June 30,
(in thousands, except per share data)
 
2012
 
2011
Numerator:
 
 
 
 
Net income
 
$
23,563

 
$
26,731

 
 
 
 
 
Denominator:
 
 
 
 

Weighted average common shares-basic
 
41,660

 
46,688

Dilutive effect of employee equity incentive plans
 
910

 
1,372

Weighted average common shares-diluted
 
42,570

 
48,060

 
 
 
 
 
Basic earnings per common share
 
$
0.57

 
$
0.57

 
 
 
 
 
Diluted earnings per common share
 
$
0.55

 
$
0.56

 
 
 
 
 
Potentially dilutive securities excluded from diluted earnings per common share because their effect is anti-dilutive
 
1,100

 
1,489