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Executive Stock Plans And Stock-Based Compensation (Tables)
 12 Months Ended
Mar. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary Of Stock Option And SAR Activity
 
Shares
 
Weighted-Average
Exercise
Price
 
Weighted-Average Contractual Term
(in years)
 
Aggregate
Intrinsic
Value
Fiscal Year Ended March 31, 2010:
 
 
 
 
 
 
 
Outstanding at beginning of year
719,557

 
$
50.41

 
 
 
 
Granted
253,800

 
35.30

 
 
 
 
Exercised
(132,892
)
 
36.09

 
 
 
 
Cancelled/expired
(8,667
)
 
24.69

 
 
 
 
Outstanding at end of year
831,798

 
48.36

 
 
 
 
 
 
 
 
 
 
 
 
Fiscal Year Ended March 31, 2011:
 
 
 
 
 
 
 
Granted
153,600

 
39.71

 
 
 
 
Cancelled/expired
(62,800
)
 
62.66

 
 
 
 
Outstanding at end of year
922,598

 
45.94

 
 
 
 
 
 
 
 
 
 
 
 
Fiscal Year Ended March 31, 2012:
 
 
 
 
 
 
 
Granted
170,400

 
37.86

 
 
 
 
Exercised
(195,948
)
 
35.82

 
 
 
 
Cancelled/expired
(41,200
)
 
59.25

 
 
 
 
Outstanding at end of year
855,850

 
$
46.01

 
6.08

 
$
4,023

 
 
 
 
 
 
 
 
Exercisable at end of year
521,444

 
$
51.28

 
4.54

 
$
1,078

Expected to vest in future periods
334,406

 
$
37.79

 
8.49

 
$
2,944
Intrinsic Value And Fair Value Of SARs
 
Fiscal Year Ended March 31,
 
2012
 
2011
 
2010
Total intrinsic value of stock options and SARs exercised
$
1,745

 
$
—

 
$
2,238

Total fair value of SARs vested
$
1,713

 
$
1,849

 
$
1,611
Summary Of RSU, Restricted Stock, And PSA Activity
 
RSUs
 
Restricted Stock
 
PSAs
 
Shares
 
Weighted-Average
Grant Date
Fair Value
 
Shares
 
Weighted-Average
Grant Date
Fair Value
 
Shares
 
Weighted-Average
Grant Date
Fair Value
Fiscal Year Ended March 31, 2010:
 
 
 
 
 
 
 
 
 
 
 
Unvested at beginning of year
149,130

 
$
49.84

 
74,900

 
$
41.08

 
30,466

 
$
45.96

Granted
73,589

 
35.93

 
17,550

 
39.76

 
63,450

 
29.67

Vested
(14,955
)
 
47.21

 
(7,700
)
 
40.41

 
—

 
—

Forfeited
—

 
—

 
—

 
—

 
(897
)
 
45.96

Unvested at end of year
207,764

 
32.50

 
84,750

 
40.87

 
93,019

 
34.85

 
 
 
 
 
 
 
 
 
 
 
 
Fiscal Year Ended March 31, 2011:
 
 
 
 
 
 
 
 
 
 
 
Granted
63,992

 
41.40

 
—

 
—

 
38,400

 
33.95

Vested
(24,940
)
 
46.35

 
(7,000
)
 
41.96

 
—

 
—

Unvested at end of year
246,816

 
44.07

 
77,750

 
40.77

 
131,419

 
34.59

 
 
 
 
 
 
 
 
 
 
 
 
Fiscal Year Ended March 31, 2012:
 
 
 
 
 
 
 
 
 
 
 
Granted
84,290

 
38.28

 
—

 
—

 
57,383

 
35.56

Vested
(39,827
)
 
35.94

 
(10,350
)
 
37.52

 
(44,352
)
 
45.96

Forfeited
—

 
—

 
—

 
—

 
(1,984
)
 
33.30

Unvested at end of year
291,279

 
$
43.72

 
67,400

 
$
41.91

 
142,466

 
$
31.45
Assumptions Used To Estimate Grant Date Fair Value Of SARs
 
Fiscal Year Ended March 31,
 
2012
 
2011
 
2010
Assumptions:
 
 
 
 
 
Expected term
5 years
 
5 years
 
5 years
Expected volatility
35.80%
 
35.30
%
 
39.00%
Expected dividend yield
5.07%
 
4.73
%
 
5.21%
Risk-free interest rate
1.66%
 
2.36
%
 
2.51%
 
 
 
 
 
 
Resulting fair value of SARs granted
$7.46
 
$8.35
 
$7.85
    
Stock-Based Compensation Expense And Related Income Tax Benefit Recognized
 
Fiscal Year Ended March 31,
 
2012
 
2011
 
2010
Total stock-based compensation expense
$
5,987

 
$
5,893

 
$
6,133

Income tax benefit recorded on stock-based compensation expense
$
2,095

 
$
2,063

 
$
2,147