Derivatives And Risk Management (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedges, Assets [Abstract]



	Purchases				Sales
	Electric Derivatives		Gas Derivatives		Electric Derivatives		Gas Derivatives
Year	Physical (1) MWh	Financial (1) MWh	Physical (1) mmBTUs	Financial (1) mmBTUs	Physical (1) MWh	Financial (1) MWh	Physical (1) mmBTUs	Financial (1) mmBTUs
2017	510	907	15,475	110,380	316	1,552	4,165	73,110
2018	397	—	—	52,755	286	1,244	1,360	15,113
2019	235	—	610	29,475	158	982	1,345	4,020
2020	—	—	910	2,725	—	—	1,430	—
2021	—	—	—	—	—	—	1,060	—
Thereafter	—	—	—	—	—	—	—	—

The following table presents the underlying energy commodity derivative volumes as of December 31, 2015 that were expected to be settled in each respective year (in thousands of MWhs and mmBTUs):



	Purchases				Sales
	Electric Derivatives		Gas Derivatives		Electric Derivatives		Gas Derivatives
Year	Physical (1) MWh	Financial (1) MWh	Physical (1) mmBTUs	Financial (1) mmBTUs	Physical (1) MWh	Financial (1) MWh	Physical (1) mmBTUs	Financial (1) mmBTUs
2016	407	1,954	17,252	142,693	280	2,656	3,182	112,233
2017	397	97	675	49,200	255	483	1,360	26,965
2018	397	—	—	15,118	286	—	1,360	2,738
2019	235	—	305	6,935	158	—	1,345	—
2020	—	—	455	905	—	—	1,430	—
Thereafter	—	—	—	—	—	—	1,060	—


(1)

Foreign Currency Exchange Contracts



	2016		2015
Number of contracts	21		24
Notional amount (in United States dollars)	$	2,819	$	1,463
Notional amount (in Canadian dollars)	3,754		2,002

Interest Rate Swap Agreements

The following table summarizes the unsettled interest rate swap derivatives that the Company has outstanding as of the balance sheet date indicated below (dollars in thousands):



Balance Sheet Date	Number of Contracts	Notional Amount	Mandatory Cash Settlement Date
December 31, 2016	6	75,000	2017
	14	275,000	2018
	6	70,000	2019
	2	20,000	2020
	5	60,000	2022
December 31, 2015	6	115,000	2016
	3	45,000	2017
	11	245,000	2018
	2	30,000	2019
	1	20,000	2022

Derivative Instruments Summary

The following table presents the fair values and locations of derivative instruments recorded on the Consolidated Balance Sheet as of December 31, 2016 (in thousands):



	Fair Value
Derivative and Balance Sheet Location	Gross Asset		Gross Liability			Collateral Netting		Net Asset (Liability) in Balance Sheet
Foreign currency exchange derivatives
Other current liabilities	$	5	$	(28	)	$	—	$	(23	)
Interest rate swap derivatives
Other current assets	3,393		—			—		3,393
Other property and investments-net and other non-current assets	5,754		(397		)	—		5,357
Other current liabilities	—		(15,756		)	9,731		(6,025		)
Non-current interest rate swap derivative liabilities	3,951		(57,825		)	25,169		(28,705		)
Energy commodity derivatives
Other current assets	18,682		(16,787		)	—		1,895
Current energy commodity derivative liabilities	16,335		(29,598		)	6,228		(7,035		)
Other non-current liabilities, regulatory liabilities and deferred credits	13,071		(29,990		)	3,630		(13,289		)
Total derivative instruments recorded on the balance sheet	$	61,191	$	(150,381	)	$	44,758	$	(44,432	)

The following table presents the fair values and locations of derivative instruments recorded on the Consolidated Balance Sheet as of December 31, 2015 (in thousands):



	Fair Value
Derivative and Balance Sheet Location	Gross Asset		Gross Liability			Collateral Netting		Net Asset (Liability) in Balance Sheet
Foreign currency exchange derivatives
Other current liabilities	$	2	$	(19	)	$	—	$	(17	)
Interest rate swap derivatives
Other property and investments-net and other non-current assets	23		—			—		23
Other current liabilities	118		(23,262		)	3,880		(19,264		)
Non-current interest rate swap derivative liabilities	1,407		(62,236		)	30,150		(30,679		)
Energy commodity derivatives
Other current assets	1,236		(553		)	—		683
Current energy commodity derivative liabilities	67,466		(85,409		)	3,675		(14,268		)
Other non-current liabilities, regulatory liabilities and deferred credits	6,613		(39,033		)	10,851		(21,569		)
Total derivative instruments recorded on the balance sheet	$	76,865	$	(210,512	)	$	48,556	$	(85,091	)

Schedule of Assets Pledged as Collateral and Related Offsets [Table Text Block]

The following table presents the Company's collateral outstanding related to its derivative instruments as of as of December 31 (in thousands):



	2016		2015
Energy commodity derivatives
Cash collateral posted	$	17,134	$	28,716
Letters of credit outstanding	24,400		28,200
Balance sheet offsetting (cash collateral against net derivative positions)	9,858		14,526

Interest rate swap derivatives
Cash collateral posted	34,900		34,030
Letters of credit outstanding	3,600		9,600
Balance sheet offsetting (cash collateral against net derivative positions)	34,900		34,030

Certain of the Company’s derivative instruments contain provisions that require the Company to maintain an "investment grade" credit rating from the major credit rating agencies. If the Company’s credit ratings were to fall below “investment grade,” it would be in violation of these provisions, and the counterparties to the derivative instruments could request immediate payment or demand immediate and ongoing collateralization on derivative instruments in net liability positions.

The following table presents the aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a liability position and the amount of additional collateral the Company could be required to post as of December 31 (in thousands):



	2016		2015
Energy commodity derivatives
Liabilities with credit-risk-related contingent features	$	1,124	$	7,090
Additional collateral to post	1,046		6,980

Interest rate swap derivatives
Liabilities with credit-risk-related contingent features	73,978		85,498
Additional collateral to post	21,100		18,750