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Accumulated Other Comprehensive Income
 12 Months Ended
Sep. 30, 2015
Equity [Abstract]  
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income
We record deferred gains (losses) in accumulated other comprehensive income (AOCI) related to available-for-sale securities, interest rate agreement cash flow hedges and commodity contract cash flow hedges. Deferred gains (losses) for our available-for-sale securities and commodity contract cash flow hedges are recognized in earnings upon settlement, while deferred gains (losses) related to our interest rate agreement cash flow hedges are recognized in earnings as they are amortized. The following tables provide the components of our accumulated other comprehensive income (loss) balances, net of the related tax effects allocated to each component of other comprehensive income.
 
Available-
for-Sale
Securities
 
Interest
Rate
Agreement
Cash Flow
Hedges
 
Commodity
Contracts
Cash Flow
Hedges
 
Total
 
(In thousands)
September 30, 2014
$
7,662

 
$
(18,381
)
 
$
(1,674
)
 
$
(12,393
)
Other comprehensive income (loss) before reclassifications
(2,173
)
 
(71,003
)
 
(49,211
)
 
(122,387
)
Amounts reclassified from accumulated other comprehensive income
(540
)
 
542

 
25,448

 
25,450

Net current-period other comprehensive income (loss)
(2,713
)
 
(70,461
)
 
(23,763
)
 
(96,937
)
September 30, 2015
$
4,949

 
$
(88,842
)
 
$
(25,437
)
 
$
(109,330
)
 
 
Available-
for-Sale
Securities
 
Interest
Rate
Agreement
Cash Flow
Hedges
 
Commodity
Contracts
Cash Flow
Hedges
 
Total
 
(In thousands)
September 30, 2013
$
5,448

 
$
37,906

 
$
(4,476
)
 
$
38,878

Other comprehensive income (loss) before reclassifications
3,009

 
(58,973
)
 
7,904

 
(48,060
)
Amounts reclassified from accumulated other comprehensive income
(795
)
 
2,686

 
(5,102
)
 
(3,211
)
Net current-period other comprehensive income (loss)
2,214

 
(56,287
)
 
2,802

 
(51,271
)
September 30, 2014
$
7,662

 
$
(18,381
)
 
$
(1,674
)
 
$
(12,393
)


The following tables detail reclassifications out of AOCI for the fiscal years ended September 30, 2015 and 2014. Amounts in parentheses below indicate decreases to net income in the statement of income.
 
Fiscal Year Ended September 30, 2015
Accumulated Other Comprehensive Income Components
Amount Reclassified from
Accumulated Other
Comprehensive Income      
 
Affected Line Item in the
Statement of Income
 
(In thousands)
 
 
Available-for-sale securities
$
850

 
Operation and maintenance expense
 
850

 
Total before tax
 
(310
)
 
Tax expense
 
$
540

 
Net of tax
Cash flow hedges
 
 
 
Interest rate agreements
$
(853
)
 
Interest charges
Commodity contracts
(41,716
)
 
Purchased gas cost
 
(42,569
)
 
Total before tax
 
16,579

 
Tax benefit
 
$
(25,990
)
 
Net of tax
Total reclassifications
$
(25,450
)
 
Net of tax

 
Fiscal Year Ended September 30, 2014
Accumulated Other Comprehensive Income Components
Amount Reclassified from
Accumulated Other
Comprehensive Income      
 
Affected Line Item in the
Statement of Income
 
(In thousands)
 
 
Available-for-sale securities
$
1,252

 
Operation and maintenance expense
 
1,252

 
Total before tax
 
(457
)
 
Tax expense
 
$
795

 
Net of tax
Cash flow hedges
 
 
 
Interest rate agreements
$
(4,230
)
 
Interest charges
Commodity contracts
8,365

 
Purchased gas cost
 
4,135

 
Total before tax
 
(1,719
)
 
Tax expense
 
$
2,416

 
Net of tax
Total reclassifications
$
3,211

 
Net of tax