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COMMON STOCK EQUITY (Tables)
 9 Months Ended
Jun. 30, 2015
Equity [Abstract]  
Changes in Common Stock Equity
Changes in common stock equity during the nine months ended June 30, 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
 
 
 
 
 
 
 
176,763

176,763

Other comprehensive income
 
 
 
 
364

 
 
 
364

Common stock issued under stock plans
1,378

2,607

12,972

 
 
 
13,784

 
29,363

Tax benefits from stock plans
 
 
(1,386
)
 
 
 
 
 
(1,386
)
Cash dividend declared ($.68 per share)
 
 
 
 
 
 
 
(57,517
)
(57,517
)
Treasury stock and other
(333
)
 
 
 
 
 
9,559

 
9,559

Balance as of June 30, 2015
85,401

$
220,830

$
211,325

 
$
(5,230
)
 
$
(97,688
)
$
794,075

$
1,123,312
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 (loss), before reclassifications, net of tax of $319, $146, $0, $465
(461
)
 
(256
)
 
—

 
(717
)
Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $(202), $(506), $(708)
—

 
349

(1) 
732

(2) 
1,081

Net current-period other comprehensive (loss) income, net of tax of $319, $(56), $(506), $(243)
(461
)
 
93

 
732

 
364

Balance as of June 30, 2015
$
4,321

 
$
—

 
$
(9,551
)
 
$
(5,230
)
 
 
 
 
 
 
 
 
Balance as of September 30, 2013
$
5,400

 
$
12

 
$
(7,033
)
 
$
(1,621
)
Other comprehensive income, net of tax
 
 
 
 
 
 
 
Other comprehensive income (loss), before reclassifications, net of tax of $(150), $91, $0, $(59)
216

 
(156
)
 
—

 
60

Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $(77), $(334), $(411)
—

 
132

(1) 
483

(2) 
615

Net current-period other comprehensive income (loss), net of tax of $(150), $14, $(334), $(470)
216

 
(24
)
 
483

 
675

Balance as of June 30, 2014
$
5,616

 
$
(12
)
 
$
(6,550
)
 
$
(946
)
(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.