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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Feb. 28, 2013
Changes in Asset Retirement Obligations
Changes in asset retirement obligations are as follows:
 
 
 
Nine months ended
 
 
February 28,
 
February 29,
In thousands
 
2013
 
2012
Balance at beginning of period
 
$3,879
 
$4,455
Additions
 
219

 
287

Accretion expense
 
130

 
132

Settlements
 
(1,617
)
 
(1,026
)
Balance at end of period
 
$2,611
 
$3,848
Calculation of Basic and Diluted EPS
Basic and Diluted EPS are calculated as follows:
 
 
 
Three months ended
 
Nine months ended
 
 
February 28,
 
February 29,
 
February 28,
 
February 29,
In thousands except per share
 
2013
 
2012
 
2013
 
2012
Earnings
 
 
 
 
 
 
 
 
Net loss from continuing operations
 
$
(8,513
)
 
$
(25,177
)
 
$
(26,098
)
 
$
(55,179
)
Net income (loss) from discontinued operations
 
$
2,699

 
$
897

 
$
6,504

 
$
2,442

Unvested restricted share participation
 
5

 
12

 
16

 
26

Loss allocated to common shareholders
 
$
(5,809
)
 
$
(24,268
)
 
$
(19,578
)
 
$
(52,711
)
Shares
 
 
 
 
 
 
 
 
Weighted-average shares outstanding
 
28,200

 
27,936

 
28,086

 
27,906

Contingently issuable shares
 
4

 
3

 
3

 
2

Unvested restricted shares
 
(14
)
 
(13
)
 
(16
)
 
(14
)
Basic weighted-average shares
 
28,190

 
27,926

 
28,073

 
27,894

Stock option, restricted share and award dilution
 
—

 
—

 
—

 
—

Diluted weighted-average shares (1)
 
28,190

 
27,926

 
28,073

 
27,894

Net loss from continuing operations
 
 
 
 
 
 
 
 
Basic
 
$
(0.30
)
 
$
(0.90
)
 
$
(0.93
)
 
$
(1.98
)
Diluted
 
$
(0.30
)
 
$
(0.90
)
 
$
(0.93
)
 
$
(1.98
)
Net income (loss) from discontinued operations
 
 
 
 
 
 
 
 
Basic
 
0.09

 
0.03

 
0.23

 
0.09

Diluted
 
0.09

 
0.03

 
0.23

 
0.09

Net loss per share
 
 
 
 
 
 
 
 
Basic
 
(0.21
)
 
(0.87
)
 
(0.70
)
 
(1.89
)
Diluted
 
(0.21
)
 
(0.87
)
 
(0.70
)
 
(1.89
)
(1)    Shares excluded due to antidilutive effect of stock options, restricted shares and awards
 
583

 
1,420

 
409

 
1,380