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Derivative Accounting (Tables)
 9 Months Ended
Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Outstanding gross notional amount of derivatives, which represents both purchases and sales (does not reflect net position)
As of September 30, 2014, we had the following outstanding gross notional volume of derivatives, which represent both purchases and sales (does not reflect net position): 
Commodity
 
Quantity
Power
 
4,167

 
GWh
Gas
 
131

 
Billion cubic feet
Gains and losses from derivative instruments in designated cash flow accounting hedges relationships
The following table provides information about gains and losses from derivative instruments in designated cash flow accounting hedging relationships during the three and nine months ended September 30, 2014 and 2013 (dollars in thousands):
 
 
 
Financial Statement Location
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
Commodity Contracts
 
 
2014
 
2013
 
2014
 
2013
Gain (Loss) Recognized in OCI on Derivative Instruments (Effective Portion)
 
OCI — derivative instruments
 
$
(149
)
 
$
(240
)
 
$
94

 
$
(409
)
Loss Reclassified from Accumulated OCI into Income (Effective Portion Realized) (a)
 
Fuel and purchased power (b)
 
(9,772
)
 
(23,658
)
 
(17,426
)
 
(39,156
)

(a)
During the three and nine months ended September 30, 2014 and 2013, we had no amounts reclassified from accumulated OCI to earnings related to discontinued cash flow hedges.
(b)
Amounts are before the effect of PSA deferrals.
Gains and losses from derivative instruments not designated as accounting hedges instruments
The following table provides information about gains and losses from derivative instruments not designated as accounting hedging instruments during the three and nine months ended September 30, 2014 and 2013 (dollars in thousands):
 
 
 
Financial Statement Location
 
Three Months Ended 
 September 30,
 
Nine Months Ended September 30,
Commodity Contracts
 
 
2014
 
2013
 
2014
 
2013
Net Gain Recognized in Income
 
Operating revenues (a)
 
$
273

 
$
196

 
$
335

 
$
400

Net Loss Recognized in Income
 
Fuel and purchased power (a)
 
(23,915
)
 
(1,341
)
 
(1,003
)
 
(11,750
)
Total
 
 
 
$
(23,642
)
 
$
(1,145
)
 
$
(668
)
 
$
(11,350
)

(a)
Amounts are before the effect of PSA deferrals.
Schedule of the entity's fair value of risk management activities reported on a gross basis and the impacts of offsetting
As of September 30, 2014:
(Dollars in thousands)
 
Gross
 Recognized
 Derivatives
 (a)
 
Amounts
Offset
 (b)
 
Net
 Recognized
 Derivatives
 
Other
 (c)
 
Amount Reported on Balance  Sheet
Current Assets
 
$
16,172

 
$
(4,790
)
 
$
11,382

 
$
481

 
$
11,863

Investments and Other Assets
 
20,712

 
(3,274
)
 
17,438

 
—

 
17,438

Total Assets
 
36,884

 
(8,064
)
 
28,820

 
481

 
29,301

 
 
 
 
 
 
 
 
 
 
 
Current Liabilities
 
(39,236
)
 
19,357

 
(19,879
)
 
(7,743
)
 
(27,622
)
Deferred Credits and Other
 
(53,193
)
 
28,808

 
(24,385
)
 
—

 
(24,385
)
Total Liabilities
 
(92,429
)
 
48,165

 
(44,264
)
 
(7,743
)
 
(52,007
)
Total
 
$
(55,545
)
 
$
40,101

 
$
(15,444
)
 
$
(7,262
)
 
$
(22,706
)

(a)
All of our gross recognized derivative instruments were subject to master netting arrangements.
(b)
Includes cash collateral provided to counterparties of $40,101.
(c)
Represents option premiums, and cash collateral and margin that is not subject to offsetting.  Amounts relate to non-derivative instruments, derivatives qualifying for scope exceptions, or collateral and margin posted in excess of the recognized derivative instrument.  Includes cash collateral received from counterparties of $7,743 and cash margin provided to counterparties of $481.
 
As of December 31, 2013:
(Dollars in thousands)
 
Gross
Recognized
Derivatives
 (a)
 
Amounts
Offset
(b)
 
Net
 Recognized
 Derivatives
 
Other
 (c)
 
Amount
Reported on
Balance  Sheet
Current Assets
 
$
24,587

 
$
(7,425
)
 
$
17,162

 
$
7

 
$
17,169

Investments and Other Assets
 
25,364

 
(1,549
)
 
23,815

 
—

 
23,815

Total Assets
 
49,951

 
(8,974
)
 
40,977

 
7

 
40,984

 
 
 
 
 
 
 
 
 
 
 
Current Liabilities
 
(50,540
)
 
26,166

 
(24,374
)
 
(7,518
)
 
(31,892
)
Deferred Credits and Other
 
(72,123
)
 
1,808

 
(70,315
)
 
—

 
(70,315
)
Total Liabilities
 
(122,663
)
 
27,974

 
(94,689
)
 
(7,518
)
 
(102,207
)
Total
 
$
(72,712
)
 
$
19,000

 
$
(53,712
)
 
$
(7,511
)
 
$
(61,223
)

(a)
All of our gross recognized derivative instruments were subject to master netting arrangements.
(b)
Includes cash collateral provided to counterparties of $19,000.
(c)
Represents cash collateral and margin that is not subject to offsetting.  Amounts relate to non-derivative instruments, derivatives qualifying for scope exceptions, or collateral and margin posted in excess of the recognized derivative instrument.  Includes cash collateral received from counterparties of $7,518, and cash margin provided to counterparties of $7.
Information about derivative instruments that have credit-risk-related contingent features
The following table provides information about our derivative instruments that have credit-risk-related contingent features at September 30, 2014 (dollars in millions):
 
September 30, 2014
Aggregate Fair Value of Derivative Instruments in a Net Liability Position
$
92

Cash Collateral Posted
40

Additional Cash Collateral in the Event Credit-Risk-Related Contingent Features were Fully Triggered (a)
52


(a)
This amount is after counterparty netting and includes those contracts which qualify for scope exceptions, which are excluded from the derivative details above.