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Fair Value of Derivative and Other Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value of Derivative and Other Financial Instruments [Abstract]

Schedule of Commodity Derivatives

PNM’s commodity derivative instruments that are recorded at fair value, all of which are accounted for as economic hedges, are summarized as follows:

	Economic Hedges
	December 31,
	2017				2016
	(In thousands)
Current assets	$	1,088			$	5,224
Deferred charges	3,556				—
	4,644				5,224
Current liabilities	(1,182		)		(2,339		)
Long-term liabilities	(3,556		)		—
	(4,738		)		(2,339		)
Net	$	(94	)		$	2,885

Summary of the Effect of Mark-to-Market Commodity Derivative Instruments on Earnings

The following table presents the effect of mark-to-market commodity derivative instruments on PNM’s earnings, excluding income tax effects. Commodity derivatives had no impact on OCI for the periods presented.

	Economic Hedges
	Year Ended December 31,
	2017				2016				2015
	(In thousands)
Electric operating revenues	$	5,151			$	(53	)		$	7,156
Cost of energy	(5,386		)		(1,208		)		(293		)
Total gain (loss)	$	(235	)		$	(1,261	)		$	6,863

Schedule of Net Buy (Sell) Volume Positions

The table below presents PNM’s net buy (sell) volume positions:

	Economic Hedges
	MMBTU			MWh
December 31, 2017	100,000			—
December 31, 2016	254,100			(2,471,600	)

Schedule of Fair Value and Unrealized Gains of Available-for-sale Securities

The fair value and gross unrealized gains of investments in available-for-sale securities are presented in the following table.

	December 31, 2017								December 31, 2016
	Unrealized  Gains				Fair Value				Unrealized  Gains				Fair Value
					(In thousands)
Cash and cash equivalents	$	—			$	52,636			$	—			$	23,683
Equity securities:
Domestic value	4,011				40,032				1,135				34,796
Domestic growth	3,995				35,456				3,032				47,595
International and other	6,810				45,867				2,029				27,481
Fixed income securities:
U.S. Government	273				34,317				115				40,962
Municipals	1,225				48,076				585				43,789
Corporate and other	1,714				67,140				553				54,671
	$	18,028			$	323,524			$	7,449			$	272,977

Schedule of Realized Gain (Loss)

Gross realized losses shown below exclude the (increase)/decrease in realized impairment losses of $3.3 million, $(1.2) million, and $(4.3) million for the years ended December 31, 2017, 2016 and 2015. See New Accounting Pronouncements in Note 1.

	Year Ended December 31,
	2017				2016				2015
	(In thousands)
Proceeds from sales	$	637,492			$	522,601			$	252,174
Gross realized gains	$	36,896			$	46,116			$	29,663
Gross realized (losses)	$	(12,993	)		$	(25,430	)		$	(9,259	)

Investments Classified by Contractual Maturity Date

At December 31, 2017, the available-for-sale and held-to-maturity debt securities had the following final maturities:

	Fair Value
	Available-for-Sale				Held-to-Maturity
	PNMR and PNM				PNMR
	(In thousands)
Within 1 year	$	4,460			$	—
After 1 year through 5 years	32,693				66,588
After 5 years through 10 years	48,681				—
After 10 years through 15 years	5,934				—
After 15 years through 20 years	11,983				—
After 20 years	45,782				—
	$	149,533			$	66,588

Schedule of Instruments Presented by Level of Hierarchy

Items recorded at fair value by PNM on the Consolidated Balance Sheets are presented below by level of the fair value hierarchy. There were no Level 3 fair value measurements at December 31, 2017 and 2016 for items recorded at fair value.

					GAAP Fair Value Hierarchy
	Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)
					(In thousands)
December 31, 2017
Available-for-sale securities
Cash and cash equivalents	$	52,636			$	52,636			$	—
Equity securities:
Domestic value	40,032				40,032				—
Domestic growth	35,456				35,456				—
International and other	45,867				42,332				3,535
Fixed income securities:
U.S. Government	34,317				33,645				672
Municipals	48,076				—				48,076
Corporate and other	67,140				—				67,140
	$	323,524			$	204,101			$	119,423
Commodity derivative assets	$	4,644			$	—			$	4,644
Commodity derivative liabilities	(4,738		)		—				(4,738		)
Net	$	(94	)		$	—			$	(94	)

December 31, 2016
Available-for-sale securities
Cash and cash equivalents	$	23,683			$	23,683			$	—
Equity securities:
Domestic value	34,796				34,796				—
Domestic growth	47,595				47,595				—
International and other	27,481				27,481				—
Fixed income securities:
U.S. Government	40,962				39,723				1,239
Municipals	43,789				—				43,789
Corporate and other	54,671				23,158				31,513
	$	272,977			$	196,436			$	76,541
Commodity derivative assets	$	5,224			$	—			$	5,224
Commodity derivative liabilities	(2,339		)		—				(2,339		)
Net	$	2,885			$	—			$	2,885

Summary of Carrying Amounts and Fair Value of Instruments

The carrying amounts and fair values of investments in the Westmoreland Loan, other investments, and long-term debt, which are not recorded at fair value on the Consolidated Balance Sheets are presented below:

									GAAP Fair Value Hierarchy
	Carrying Amount				Fair Value				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
December 31, 2017	(In thousands)
PNMR
Long-term debt	$	2,437,645			$	2,554,836			$	—			$	2,554,836			$	—
Westmoreland Loan	$	56,640			$	66,588			$	—			$	—			$	66,588
Other investments	$	503			$	503			$	503			$	—			$	—
PNM
Long-term debt	$	1,657,910			$	1,727,135			$	—			$	1,727,135			$	—
Other investments	$	283			$	283			$	283			$	—			$	—
TNMP
Long-term debt	$	480,620			$	527,563			$	—			$	527,563			$	—
Other investments	$	220			$	220			$	220			$	—			$	—
December 31, 2016
PNMR
Long-term debt	$	2,392,712			$	2,540,693			$	—			$	2,540,693			$	—
Westmoreland Loan	$	95,000			$	100,893			$	—			$	—			$	100,893
Other investments	$	547			$	1,164			$	547			$	—			$	617
PNM
Long-term debt	$	1,631,369			$	1,730,157			$	—			$	1,730,157			$	—
Other investments	$	316			$	316			$	316			$	—			$	—
TNMP
Long-term debt	$	420,875			$	468,329			$	—			$	468,329			$	—
Other investments	$	231			$	231			$	231			$	—			$	—

Schedule of Investments Held by the Employee Benefit Plans

The fair values of investments held by the employee benefit plans are as follows:

					GAAP Fair Value Hierarchy
	Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
December 31, 2017					(In thousands)
PNM Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy	$	487,498			$	140,218			$	347,089			$	191
Uncategorized investments	74,768
Total Master Trust Investments	$	562,266
TNMP Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy	$	53,273			$	15,244			$	38,008			$	21
Uncategorized investments	10,260
Total Master Trust Investments	$	63,533
PNM OPEB Plan
Cash and cash equivalents	$	437			$	437			$	—			$	—
Equity securities:
International funds	10,636				—				10,636				—
Domestic value	10,816				10,816				—				—
Domestic growth	6,710				6,710				—				—
Other funds	31,660				—				31,660				—
Fixed income securities:
Mutual funds	20,918				20,918				—				—
	$	81,177			$	38,881			$	42,296			$	—
TNMP OPEB Plan
Cash and cash equivalents	$	149			$	149			$	—			$	—
Equity securities:
International funds	1,597				—				1,597				—
Domestic value	293				293				—				—
Domestic growth	1,410				1,410				—				—
Other funds	4,011				—				4,011				—
Fixed income securities:
Mutual funds	2,685				2,685				—				—
	$	10,145			$	4,537			$	5,608			$	—

					GAAP Fair Value Hierarchy
	Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
December 31, 2016	(In thousands)
PNM Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy	$	467,965			$	129,624			$	337,989			$	352
Uncategorized investments	75,685
Total Master Trust Investments	$	543,650
TNMP Pension Plan
Participation in PNMR Master Trust Investments:
Investments categorized within fair value hierarchy	$	50,901			$	14,447			$	36,416			$	38
Uncategorized investments	9,729
Total Master Trust Investments	$	60,630
PNM OPEB Plan
Cash and cash equivalents	$	2,567			$	2,567			$	—			$	—
Equity securities:
International funds	9,300				—				9,300				—
Domestic value	10,260				10,260				—				—
Domestic growth	6,338				6,338				—				—
Other funds	26,405				—				26,405				—
Fixed income securities:
Mutual funds	18,959				18,959				—				—
	$	73,829			$	38,124			$	35,705			$	—
TNMP OPEB Plan
Cash and cash equivalents	$	308			$	308			$	—			$	—
Equity securities:
International funds	1,279				—				1,279				—
Domestic value	449				449				—				—
Domestic growth	1,089				1,089				—				—
Other funds	3,060				—				3,060				—
Fixed income securities:
Mutual funds	2,593				2,593				—				—
	$	8,778			$	4,439			$	4,339			$	—

The fair values of investments in the PNMR Master Trust are as follows:

					GAAP Fair Value Hierarchy
	Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
December 31, 2017	(In thousands)
PNMR Master Trust
Cash and cash equivalents	$	7,697			$	7,697			$	—			$	—
Equity securities:
International	42,048				—				42,048				—
Domestic value	37,026				37,026				—				—
Domestic growth	19,136				19,136				—				—
Other funds	25,099				—				25,099				—
Fixed income securities:
Corporate	215,535				—				215,323				212
U.S. Government	117,572				91,603				25,969				—
Municipals	11,438				—				11,438				—
Other funds	65,220				—				65,220				—
Total investments categorized within fair value hierarchy	540,771				$	155,462			$	385,097			$	212
Uncategorized investments:
Private equity funds	22,281
Hedge funds	45,615
Real estate funds	17,132
	$	625,799
December 31, 2016
PNMR Master Trust
Cash and cash equivalents	$	20,503			$	20,503			$	—			$	—
Equity securities:
International	38,401				—				38,401				—
Domestic value	36,036				36,036				—				—
Domestic growth	18,484				18,484				—				—
Other funds	27,532				—				27,532				—
Fixed income securities:
Corporate	205,419				—				205,029				390
U.S. Government	94,359				69,048				25,311				—
Municipals	13,970				—				13,970				—
Other funds	64,162				—				64,162				—
Total investments categorized within fair value hierarchy	518,866				$	144,071			$	374,405			$	390
Uncategorized investments:
Private equity funds	27,060
Hedge funds	42,070
Real estate funds	16,284
	$	604,280

Summary of Level 3 Measurements

A reconciliation of the changes in Level 3 fair value measurements is as follows:

	Fixed Income - Corporate
PNMR Master Trust	PNM Pension				TNMP Pension				Total Master Trust
	(In thousands)
Balance at December 31, 2015	$	719			$	78			$	797
Actual return on assets sold during the period	1				—				1
Actual return on assets still held at period end	19				2				21
Purchases	—				—				—
Sales	(387		)		(42		)		(429		)
Balance at December 31, 2016	352				38				390
Actual return on assets sold during the period	1				—				1
Actual return on assets still held at period end	(7		)		(1		)		(8		)
Purchases	92				10				102
Sales	(247		)		(26		)		(273		)
Balance at December 31, 2017	$	191			$	21			$	212

The following table presents information about the PBO, fair value of plan assets, and funded status of the plans:

	PNM Plan								TNMP Plan
	Year Ended December 31,								Year Ended December 31,
	2017				2016				2017				2016
	(In thousands)
PBO at beginning of year	$	621,751			$	597,900			$	67,061			$	64,198
Service cost	—				—				—				—
Interest cost	26,908				30,307				2,887				3,304
Actuarial (gain) loss	26,298				39,463				3,050				4,318
Benefits paid	(50,974		)		(45,919		)		(4,575		)		(4,759		)
PBO at end of year	623,983				621,751				68,423				67,061
Fair value of plan assets at beginning of year	543,601				557,923				60,624				62,082
Actual return on plan assets	69,389				31,597				7,450				3,301
Employer contributions	—				—				—				—
Benefits paid	(50,974		)		(45,919		)		(4,575		)		(4,759		)
Fair value of plan assets at end of year	562,016				543,601				63,499				60,624
Funded status – asset (liability) for pension benefits	$	(61,967	)		$	(78,150	)		$	(4,924	)		$	(6,437	)

The following table presents information about the APBO, the fair value of plan assets, and the funded status of the plans:

	PNM Plan								TNMP Plan
	Year Ended December 31,								Year Ended December 31,
	2017				2016				2017				2016
	(In thousands)
APBO at beginning of year	$	94,269			$	84,674			$	12,830			$	13,106
Service cost	96				140				143				186
Interest cost	4,025				4,346				556				677
Participant contributions	3,069				2,690				379				520
Actuarial (gain) loss	(1,601		)		17,877				(381		)		(96		)
Benefits paid	(9,961		)		(11,734		)		(1,248		)		(1,563		)
Plan design changes	—				(3,724		)		—				—
APBO at end of year	89,897				94,269				12,279				12,830
Fair value of plan assets at beginning of year	72,694				72,952				8,544				9,111
Actual return on plan assets	14,222				5,923				1,642				476
Employer contributions	332				2,863				685				—
Participant contributions	3,069				2,690				379				520
Benefits paid	(9,961		)		(11,734		)		(1,248		)		(1,563		)
Fair value of plan assets at end of year	80,356				72,694				10,002				8,544
Funded status – asset (liability)	$	(9,541	)		$	(21,575	)		$	(2,277	)		$	(4,286	)

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Fair Value of Derivative and Other Financial Instruments [Abstract]

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Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

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