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COMMON STOCK EQUITY (Tables)
 6 Months Ended
Mar. 31, 2015
Equity [Abstract]  
Changes in Common Stock Equity
Changes in common stock equity during the six months ended March 31, 2015, are as follows:
(Thousands)
Number of Shares
Common Stock
Premium on Common Stock
Accumulated Other Comprehensive (Loss) Income
Treasury Stock And Other
Retained Earnings
Total
Balance as of September 30, 2014
84,356

$
218,223

$
199,739

 
$
(5,594
)
 
$
(121,031
)
$
674,829

$
966,166

Net income
 
 
 
 
 
 
 
184,223

184,223

Other comprehensive income
 
 
 
 
682

 
 
 
682

Common stock issued under stock plans
1,196

2,607

15,267

 
 
 
6,329

 
24,203

Tax benefits from stock plans
 
 
(1,386
)
 
 
 
 
 
(1,386
)
Cash dividend declared ($.45 per share)
 
 
 
 
 
 
 
(38,248
)
(38,248
)
Treasury stock and other
(92
)
 
 
 
 
 
15,483

 
15,483

Balance as of March 31, 2015
85,460

$
220,830

$
213,620

 
$
(4,912
)
 
$
(99,219
)
$
820,804

$
1,151,123
Components of Accumulated Other Comprehensive Income, Net of Tax
The following table presents the changes in the components of accumulated other comprehensive income, net of related tax effects:
(Thousands)
Available for Sale Securities
Cash Flow Hedges
Postemployment Benefit Obligation
Total
Balance as of September 30, 2014
$
4,782

 
$
(93
)
 
$
(10,283
)
 
$
(5,594
)
Other comprehensive income, net of tax
 
 
 
 
 
 
 
Other comprehensive income (loss), before reclassifications, net of tax of $(75), $149, $0, $74
109

 
(256
)
 
—

 
(147
)
Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $(199), $(337), $(536)
—

 
343

(1) 
486

(2) 
829

Net current-period other comprehensive income, net of tax of $(75), $(50), $(337), $(462)
109

 
87

 
486

 
682

Balance as of March 31, 2015
$
4,891

 
$
(6
)
 
$
(9,797
)
 
$
(4,912
)
 
 
 
 
 
 
 
 
Balance as of September 30, 2013
$
5,400

 
$
12

 
$
(7,033
)
 
$
(1,621
)
Other comprehensive income, net of tax
 
 
 
 
 
 
 
Other comprehensive (loss), before reclassifications, net of tax of $203, $169, $0, $372
(295
)
 
(291
)
 
—

 
(586
)
Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $(60), $(223), $(283)
—

 
105

(1) 
322

(2) 
427

Net current-period other comprehensive (loss) income, net of tax of $203, $109, $(223), $89
(295
)
 
(186
)
 
322

 
(159
)
Balance as of March 31, 2014
$
5,105

 
$
(174
)
 
$
(6,711
)
 
$
(1,780
)
(1)
Consists of realized losses related to foreign currency derivatives, which are reclassified to gas purchases in the Unaudited Condensed Consolidated Statements of Operations.
(2)
Included in the computation of net periodic pension cost, a component of operations and maintenance expense in the Unaudited Condensed Consolidated Statements of Operations.