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Stock-Based Compensation (Tables)
 9 Months Ended
Dec. 31, 2012
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]  
Stock-Based Compensation Expense Recognized
The following table summarizes stock-based compensation expense recognized by the Company for the three and nine months ended December 31, 2012 and 2011.

 
Three Months Ended
 
Nine Months Ended
 
December 31,
 
December 31,
(In thousands)
2012
 
2011
 
2012
 
2011
Stock-based compensation expense related to:
 
 
 
 
 
 
 
Equity Incentive Plan
$
3,528

 
$
3,311

 
$
19,682

 
$
18,450

Employee Stock Purchase Plan - options to purchase stock
1,024

 
971

 
3,062

 
2,902

 
4,552

 
4,282

 
22,744

 
21,352

Tax benefit
(1,443
)
 
(1,410
)
 
(7,826
)
 
(7,370
)
Stock-based compensation expense, net of tax
$
3,109

 
$
2,872

 
$
14,918

 
$
13,982
Summary of Stock Option Activity
The following table summarizes the stock option activity during the nine months ended December 31, 2012:

(In thousands, except per share amounts)
Number of Stock Options
 
Weighted-Average
Exercise Price
Outstanding at March 31, 2012
6,584

 
$
47.08

Granted
966

 
$
91.52

Exercised
(2,165
)
 
$
36.13

Forfeited
(51
)
 
$
73.15

Outstanding at December 31, 2012
5,334

 
$
59.32

Vested or expected to vest at December 31, 2012
5,315

 
$
59.23

Exercisable at December 31, 2012
2,949

 
$
49.04
ESPP - Purchase Option Activity
The following table summarizes the activity of the ESPP during the nine months ended December 31, 2012:

(In thousands, except per share amounts)
Number of Purchase Options
 
Weighted-Average
Exercise Price
Outstanding at March 31, 2012
79
 
$
51.61

Granted
243
 
$
70.75

Exercised
(200)
 
$
63.84

Outstanding at December 31, 2012
122
 
$
69.65