10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_________________________________ 

Form 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2018

OR

o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from _______ to _______

Commission file number: 001-14206

El Paso Electric Company

(Exact name of registrant as specified in its charter)

Texas	74-0607870
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
Stanton Tower, 100 North Stanton, El Paso, Texas	79901
(Address of principal executive offices)	(Zip Code)

(915) 543-5711

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO  o

Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    YES  x    NO  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o	Smaller reporting company	o
		Emerging growth company	o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  o    NO  x

As of July 31, 2018, there were 40,691,320 shares of the Company’s no par value common stock outstanding.

DEFINITIONS

The following abbreviations, acronyms or defined terms used in this report are defined below:

Abbreviations, Acronyms or Defined Terms	Terms
A&G	Administrative and general
ABFUDC	Allowance for Borrowed Funds Used During Construction
AEFUDC	Allowance for Equity Funds Used During Construction
AFUDC	Allowance for Funds Used During Construction
ANPP Participation Agreement	Arizona Nuclear Power Project Participation Agreement dated August 23, 1973, as amended
AOCI	Accumulated Other Comprehensive Income
APS	Arizona Public Service Company
ARO	Asset Retirement Obligations
ASC	Accounting Standards Codification
ASU	Accounting Standards Update
CAA	Clean Air Act
CCN	Certificate of Convenience and Necessity
Company	El Paso Electric Company
CWIP	Construction Work In Progress
DOE	U.S. Department of Energy
El Paso	City of El Paso, Texas
FASB	Financial Accounting Standards Board
FERC	Federal Energy Regulatory Commission
Four Corners	Four Corners Generating Station
FPPCAC	New Mexico Fuel and Purchased Power Cost Adjustment Clause
GAAP	U.S. Generally Accepted Accounting Principles
HAFB	Holloman Air Force Base
IRS	U.S. Internal Revenue Service
kW	Kilowatt(s)
kWh	Kilowatt-hour(s)
Las Cruces	City of Las Cruces, New Mexico
MPS	The Company's Montana Power Station
MW	Megawatt(s)
MWh	Megawatt-hour(s)
NAV	Net Asset Value
Newman	The Company's Newman Power Station
NDT	The Company's Palo Verde nuclear decommissioning trust funds
NMPRC	New Mexico Public Regulation Commission
NMPRC Final Order	NMPRC Final Order in Case No. 15-00127-UT
NOL carryforwards	Net Operating Loss carryforwards
OATT	Open Access Transmission Tariff
O&M	Operations and maintenance
Palo Verde	Palo Verde Generating Station
PUCT	Public Utility Commission of Texas
RCF	The Company's Revolving Credit Facility
RGEC	Rio Grande Electric Cooperative

(i)

Abbreviations, Acronyms or Defined Terms	Terms
RGRT	Rio Grande Resources Trust II
Rio Grande	The Company's Rio Grande Power Station
SAB 118	SEC Staff Accounting Bulletin No. 118
SEC	U.S. Securities and Exchange Commission
TCJA	The Federal Tax Cuts and Jobs Act of 2017
Texas Fuel Rule	Texas fuel cost recovery rule
U.S.	United States
2016 PUCT Final Order	PUCT Final Order in Docket No. 44941
2017 Form 10-K	Annual Report of El Paso Electric Company on Form 10-K for the fiscal year ended December 31, 2017
2017 PUCT Final Order	PUCT Final Order in Docket No. 46831

(ii)

EL PASO ELECTRIC COMPANY

INDEX TO FORM 10-Q

		Page No.
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements
	Balance Sheets - June 30, 2018 and December 31, 2017	1
	Statements of Operations – Three Months, Six Months and Twelve Months Ended June 30, 2018 and 2017	3
	Statements of Comprehensive Operations – Three Months, Six Months and Twelve Months Ended June 30, 2018 and 2017	5
	Statements of Cash Flows – Six Months Ended June 30, 2018 and 2017	6
	Notes to Financial Statements	7
	Report of Independent Registered Public Accounting Firm	32
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	33
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	49
Item 4.	Controls and Procedures	49
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	50
Item 1A.	Risk Factors	50
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	50
Item 5.	Other Information	50
Item 6.	Exhibits	51

(iii)

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

EL PASO ELECTRIC COMPANY

BALANCE SHEETS

	June 30, 2018			December 31, 2017
	(Unaudited)
ASSETS (In thousands)
Utility plant:
Electric plant in service	$	4,062,509		$	3,982,095
Less accumulated depreciation and amortization	(1,352,503		)	(1,320,175		)
Net plant in service	2,710,006			2,661,920
Construction work in progress	169,536			146,059
Nuclear fuel; includes fuel in process of $60,240 and $59,689, respectively	195,453			194,933
Less accumulated amortization	(73,258		)	(74,475		)
Net nuclear fuel	122,195			120,458
Net utility plant	3,001,737			2,928,437
Current assets:
Cash and cash equivalents	11,923			6,990
Accounts receivable, principally trade, net of allowance for doubtful accounts of $1,653 and $2,300, respectively	107,084			88,585
Inventories, at cost	49,432			50,910
Under-collection of fuel revenues, regulatory asset	965			—
Prepayments and other	15,901			10,307
Total current assets	185,305			156,792
Deferred charges and other assets:
Decommissioning trust funds	287,126			286,866
Regulatory assets	89,335			96,036
Other	16,622			16,232
Total deferred charges and other assets	393,083			399,134
Total assets	$	3,580,125		$	3,484,363

See accompanying notes to financial statements.

1

EL PASO ELECTRIC COMPANY

BALANCE SHEETS (Continued)

	June 30, 2018			December 31, 2017
	(Unaudited)
CAPITALIZATION AND LIABILITIES (In thousands except for share data)
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 65,670,746 and 65,694,829 shares issued, and 157,942 and 133,859 restricted shares, respectively	$	65,829		$	65,829
Capital in excess of stated value	326,042			326,117
Retained earnings	1,198,767			1,159,667
Accumulated other comprehensive income (loss), net of tax	(33,746		)	11,058
	1,556,892			1,562,671
Treasury stock, 25,135,367 and 25,244,350 shares, respectively, at cost	(418,690		)	(420,506		)
Common stock equity	1,138,202			1,142,165
Long-term debt, net of current portion	1,385,154			1,195,988
Total capitalization	2,523,356			2,338,153
Current liabilities:
Short-term borrowings under the revolving credit facility	80,445			173,533
Accounts payable, principally trade	51,959			59,270
Taxes accrued	29,148			35,660
Interest accrued	12,749			12,470
Over-collection of fuel revenues, regulatory liability	8,174			6,225
Other	39,341			29,067
Total current liabilities	221,816			316,225
Deferred credits and other liabilities:
Accumulated deferred income taxes	305,832			305,023
Accrued pension liability	79,334			83,838
Accrued post-retirement benefit liability	27,497			26,417
Asset retirement obligation	97,059			93,029
Regulatory liabilities	298,243			296,685
Other	26,988			24,993
Total deferred credits and other liabilities	834,953			829,985
Commitments and contingencies
Total capitalization and liabilities	$	3,580,125		$	3,484,363

See accompanying notes to financial statements.

2

EL PASO ELECTRIC COMPANY

STATEMENTS OF OPERATIONS

(Unaudited)

(In thousands except for share data)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Operating revenues	$	236,796		$	251,843		$	412,509		$	423,178
Operating expenses:
Fuel and purchased power	53,463			65,894			105,651			116,173
Operations and maintenance	88,855			82,273			169,015			161,460
Depreciation and amortization	23,958			22,495			47,772			44,429
Taxes other than income taxes	17,381			17,265			32,888			32,995
	183,657			187,927			355,326			355,057
Operating income	53,139			63,916			57,183			68,121
Other income (deductions):
Allowance for equity funds used during construction	718			726			1,638			1,541
Investment and interest income, net	11,072			12,056			16,227			21,319
Miscellaneous non-operating income	3,072			2,897			6,208			5,792
Miscellaneous non-operating deductions	(2,769		)	(2,669		)	(5,512		)	(5,497		)
	12,093			13,010			18,561			23,155
Interest charges (credits):
Interest on long-term debt and revolving credit facility	18,194			18,407			36,182			36,774
Other interest	5,115			4,728			9,769			9,073
Capitalized interest	(1,365		)	(1,344		)	(2,579		)	(2,638		)
Allowance for borrowed funds used during construction	(772		)	(711		)	(1,670		)	(1,502		)
	21,172			21,080			41,702			41,707
Income before income taxes	44,060			55,846			34,042			49,569
Income tax expense	10,765			19,780			7,713			17,492
Net income	$	33,295		$	36,066		$	26,329		$	32,077
Basic earnings per share	$	0.82		$	0.89		$	0.65		$	0.79
Diluted earnings per share	$	0.82		$	0.89		$	0.65		$	0.79
Dividends declared per share of common stock	$	0.360		$	0.335		$	0.695		$	0.645
Weighted average number of shares outstanding	40,517,713			40,409,030			40,504,526			40,398,192
Weighted average number of shares and dilutive potential shares outstanding	40,647,799			40,525,585			40,618,045			40,499,344

See accompanying notes to financial statements.

3

EL PASO ELECTRIC COMPANY

STATEMENTS OF OPERATIONS

(Unaudited)

(In thousands except for share data)

	Twelve Months Ended
	June 30,
	2018			2017
Operating revenues	$	906,128		$	934,440
Operating expenses:
Fuel and purchased power	234,229			248,920
Operations and maintenance	327,836			321,070
Depreciation and amortization	94,186			81,601
Taxes other than income taxes	70,756			68,396
	727,007			719,987
Operating income	179,121			214,453
Other income (deductions):
Allowance for equity funds used during construction	3,122			4,095
Investment and interest income, net	33,761			39,251
Miscellaneous non-operating income	12,466			11,404
Miscellaneous non-operating deductions	(11,594		)	(11,404		)
	37,755			43,346
Interest charges (credits):
Interest on long-term debt and revolving credit facility	72,378			73,421
Other interest	18,866			17,473
Capitalized interest	(4,963		)	(5,133		)
Allowance for borrowed funds used during construction	(3,143		)	(3,452		)
	83,138			82,309
Income before income taxes	133,738			175,490
Income tax expense	41,225			63,121
Net income	$	92,513		$	112,369
Basic earnings per share	$	2.28		$	2.77
Diluted earnings per share	$	2.27		$	2.77
Dividends declared per share of common stock	$	1.365		$	1.265
Weighted average number of shares outstanding	40,467,231			40,381,776
Weighted average number of shares and dilutive potential shares outstanding	40,594,049			40,466,995

See accompanying notes to financial statements.

4

EL PASO ELECTRIC COMPANY

STATEMENTS OF COMPREHENSIVE OPERATIONS

(Unaudited)

(In thousands)

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Net income	$	33,295		$	36,066		$	26,329		$	32,077		$	92,513		$	112,369
Other comprehensive income (loss):
Unrecognized pension and post-retirement benefit costs:
Net gain (loss) arising during period	—			—			—			—			12,634			(20,053		)
Prior service benefit	—			—			—			—			—			32,697
Reclassification adjustments included in net income for amortization of:
Prior service benefit	(2,414		)	(2,413		)	(4,830		)	(4,829		)	(9,658		)	(8,906		)
Net loss	1,575			1,694			3,150			3,388			6,538			5,908
Net unrealized gains/losses on marketable securities:
Net holding gains (losses) arising during period	(1,253		)	4,458			(3,961		)	12,179			9,135			15,643
Reclassification adjustments for net (gains) losses included in net income	147			(5,166		)	665			(7,357		)	(2,604		)	(11,499		)
Net losses on cash flow hedges:
Reclassification adjustment for interest expense included in net income	140			132			279			262			549			515
Total other comprehensive income (loss) before income taxes	(1,805		)	(1,295		)	(4,697		)	3,643			16,594			14,305
Income tax benefit (expense) related to items of other comprehensive income (loss):
Unrecognized pension and post-retirement benefit costs	190			261			346			454			(3,723		)	(4,029		)
Net unrealized (gains) losses on marketable securities	221			132			656			(989		)	(1,277		)	(773		)
Losses on cash flow hedges	(31		)	(47		)	(81		)	(125		)	(179		)	(336		)
Total income tax benefit (expense)	380			346			921			(660		)	(5,179		)	(5,138		)
Other comprehensive income (loss), net of tax	(1,425		)	(949		)	(3,776		)	2,983			11,415			9,167
Comprehensive income	$	31,870		$	35,117		$	22,553		$	35,060		$	103,928		$	121,536

See accompanying notes to financial statements.

5

EL PASO ELECTRIC COMPANY

STATEMENTS OF CASH FLOWS

(Unaudited)

(In thousands)

	Six Months Ended
	June 30,
	2018			2017
Cash flows from operating activities:
Net income	$	26,329		$	32,077
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of electric plant in service	47,772			44,429
Amortization of nuclear fuel	19,570			21,100
Deferred income taxes, net	4,204			15,339
Allowance for equity funds used during construction	(1,638		)	(1,541		)
Other amortization and accretion	10,350			9,991
Net gain on decommissioning trust funds	(593		)	(7,357		)
Other operating activities	11			(641		)
Change in:
Accounts receivable	(23,516		)	(32,684		)
Inventories	1,906			(2,791		)
Prepayments and other	(8,192		)	(6,294		)
Accounts payable	(6,405		)	(1,262		)
Taxes accrued	(4,460		)	(4,014		)
Interest accrued	279			86
Net over-collection of fuel revenues	984			2,667
Other current liabilities	10,274			3,530
Deferred charges and credits	(2,448		)	(4,644		)
Net cash provided by operating activities	74,427			67,991
Cash flows from investing activities:
Cash additions to utility property, plant and equipment	(117,349		)	(108,113		)
Cash additions to nuclear fuel	(18,930		)	(20,647		)
Insurance proceeds received for equipment	5,351			1,725
Capitalized interest and AFUDC:
Utility property, plant and equipment	(3,308		)	(3,043		)
Nuclear fuel and other	(2,579		)	(2,638		)
Allowance for equity funds used during construction	1,638			1,541
Decommissioning trust funds:
Purchases, including funding of $1.1 million and $2.3 million, respectively	(47,896		)	(65,960		)
Sales and maturities	44,933			62,531
Other investing activities	2,134			(928		)
Net cash used for investing activities	(136,006		)	(135,532		)
Cash flows from financing activities:
Dividends paid	(28,257		)	(26,157		)
Borrowings under the revolving credit facility:
Proceeds	419,559			292,404
Payments	(512,647		)	(195,094		)
Proceeds from issuance of senior notes	125,000			—
Proceeds from issuance of RGRT senior notes	65,000			—
Other financing activities	(2,143		)	(757		)
Net cash provided by financing activities	66,512			70,396
Net increase in cash and cash equivalents	4,933			2,855
Cash and cash equivalents at beginning of period	6,990			8,420
Cash and cash equivalents at end of period	$	11,923		$	11,275

See accompanying notes to financial statements.

6

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

A. Principles of Preparation

These condensed financial statements should be read in conjunction with the financial statements and notes thereto in the Annual Report of El Paso Electric Company on Form 10-K for the fiscal year ended December 31, 2017 ("2017 Form 10-K"). Capitalized terms used in this report and not defined herein have the meaning ascribed to such terms in the 2017 Form 10-K. In the opinion of the Company’s management, the accompanying financial statements contain all adjustments necessary to present fairly the financial position of the Company at June 30, 2018 and December 31, 2017; the results of its operations and comprehensive operations for the three, six and twelve months endedJune 30, 2018 and 2017; and its cash flows for the six months endedJune 30, 2018 and 2017. The results of operations and comprehensive operations for the three, six and twelve months ended June 30, 2018 and 2017, and the cash flows for the six months endedJune 30, 2018 and 2017, are not necessarily indicative of the results to be expected for the full calendar year.

Pursuant to the rules and regulations of the U.S. Securities Exchange Commission ("SEC"), certain financial information has been condensed and certain footnote disclosures have been omitted. Such information and disclosures are normally included in financial statements prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP").

Reclassification. Certain amounts in the financial statements for 2017 have been reclassified to conform with the 2018 presentation. The Company implemented Accounting Standards Update ("ASU") 2017-07, Compensation - Retirement Benefits, and ASU 2016-15, Statement of Cash Flows, in the first quarter of 2018, retrospective to all periods presented in the Company's financial statements. See "New Accounting Standards Adopted" below for further details.

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company evaluates its estimates on an on-going basis, including those related to depreciation, unbilled revenue, income taxes, fuel costs, pension and other post-retirement obligations and asset retirement obligations ("AROs"). Actual results could differ from those estimates.

Revenues. The Company recognizes revenue associated with contracts with customers when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. Unbilled revenues are recorded for estimated amounts of energy delivered in the period following the customer's last billing cycle to the end of the reporting period. Unbilled revenues are estimated based on monthly generation volumes and by applying an average revenue/kilowatt-hour ("kWh") to the number of estimated kWhs delivered but not billed. Accounts receivable included accrued unbilled revenues of $38.3 million at June 30, 2018 and $22.2 million at December 31, 2017. The Company presents revenues net of sales taxes in its statements of operations.

Depreciation. The Company routinely evaluates the depreciable service lives, cost of removal and salvage values of its property, plant and equipment. Depreciation is provided on a straight-line basis over the estimated remaining lives of the assets (ranging in average from 5 to 48 years). When property subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its cost together with the cost of removal, less salvage is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation is removed from the balance sheet accounts and a gain or loss is recognized.

New Accounting Standards Adopted

In March 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting, to simplify the accounting for share-based payment transactions, including the income tax consequences, classification of awards either as equity or liabilities, and classification on the statements of cash flows. The Company adopted the new standard effective January 1, 2017. The adoption of the new standard did not have a material impact on the Company’s financial condition, results of operations or cash flows. The

7

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

cumulative effect of the adoption of the new standard was to increase net operating loss carryforward deferred tax assets and retained earnings by $0.2 million on January 1, 2017.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to provide a framework that replaces the existing revenue recognition guidance, and has since modified the standard with several ASUs. The standard provides that an entity should recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. On January 1, 2018, the Company adopted the new accounting standard using the modified retrospective method. There was no cumulative effect adjustment at the initial application of the new standard. In addition, comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company expects the ongoing impact of the new standard to be immaterial to net income. As required by the standard, revenues of $3.8 million related to reimbursed costs of energy efficiency programs approved by the Company's regulators are reported in year-to-date operating revenues from customers prospectively, as opposed to being offset with associated costs within operations and maintenance. Related expenses of an equal amount are reported in operations and maintenance expenses. See Note B, Revenues, for additional information.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Liabilities, to enhance the reporting model for financial instruments by addressing certain aspects of recognition, measurement, presentation and disclosure. The Company adopted the new standard effective January 1, 2018. The adoption of ASU 2016-01 eliminates the requirements to classify investments in equity securities with readily determinable fair values into trading or available for sale and requires entities to measure equity investments at fair value and recognize any changes in fair value in the Statements of Operations. ASU 2016-01 requires a modified-retrospective approach and therefore comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Upon adoption of the new standard, the Company recorded a cumulative effect adjustment, net of income taxes, to increase retained earnings by $41.0 million with an offset to accumulated other comprehensive income ("AOCI"). In addition, the Company recorded net losses of $2.8 million related to equity securities still held at June 30, 2018. In March 2018, the FASB issued ASU 2018-04, Investments - Debt Securities (Topic 320) and Regulated Operations (Topic 980), which provides clarification to ASU 2016-01.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments, to reduce diversity in practice in how certain cash receipts and cash payments are classified in the statement of cash flows. The Company adopted the new standard effective January 1, 2018. ASU 2016-15 was applied using a retrospective transition method to each period presented. Accordingly, the Company presented in the Statement of Cash Flows insurance proceeds received for equipment of $5.4 million and $1.7 million, respectively, for the six months ended June 30, 2018 and 2017 as cash inflows from investing activities.

In March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715) Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. ASU 2017-07 amends Accounting Standards Codification ("ASC") 715, Compensation - Retirement Benefits, to require companies to present the service cost component of net benefit cost in the income statement line items where compensation cost is reported. Companies will present all other components of net benefit cost separately from the line item(s) that includes the service cost and outside of any subtotal of operating income. In addition, only the service cost component will be eligible for capitalization in assets. The Company adopted the new standard effective January 1, 2018. The amendments in ASU 2017-07 were applied retrospectively for the income statement presentation of the service cost component and the other components of net benefit costs. The Company elected to apply the practical expedient and used the amounts disclosed in its pension and other postretirement benefit plan note for the 2017 comparative period as the estimation basis for applying the retrospective presentation requirements. See Note J, Employee Benefits, for additional information.

In March 2018, the FASB issued ASU 2018-05, Income Taxes (Topic 740) Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 ("SAB 118"), to add various SEC paragraphs for clarification due to the Federal Tax Cuts and Jobs Act of 2017 ("TCJA"). The Company adopted ASU 2018-05 upon issuance and implemented SAB 118 in December of 2017 in conjunction with the enactment of the TCJA.

New Accounting Standards to be Adopted in the Future

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requiring qualitative and quantitative disclosures on leasing agreements. ASU 2016-02 maintains a distinction between finance leases and operating leases similar to the distinction under previous lease guidance for capital leases and operating leases. The impact of leases reported in the Company's operating results and statement of cash flows is expected to be similar to previous GAAP. ASU 2016-02 requires the recognition

8

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

in the statement of financial position, by the lessee, of a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. How leases are recorded in regard to financial position represents a significant change from previous GAAP guidance. The lessee is permitted to make an accounting policy election to not recognize lease assets and lease liabilities for short-term leases. Implementation of the standard will be required for reporting periods beginning after December 15, 2018. Adoption of the new lease accounting standard will require the Company to apply the new standard to the earliest period using a modified retrospective approach. The Company is currently in the process of evaluating the impact of the new standard, which includes continuing to monitor activities of the FASB, including the impact of ASU 2018-01, Land Easement Practical expedient for Transition to Topic 842 and ASU 2018-11, Targeted Improvements. ASU 2018-11 allows entities to adopt the standard with a cumulative effect adjustment as of the beginning of the adoption year, while maintaining prior year comparative financial information and disclosures as reported. ASU 2018-01 provides an optional practical expedient to not evaluate existing or expired land easements under Topic 842, if those land easements were not previously accounted for as leases under ASC Topic 840. The Company currently anticipates that it will apply the practical expedient under ASU 2018-01 to its existing or expired land easements as part of its transition to Topic 842. The Company's evaluation process also includes evaluating the impact, if any, on changes to business processes, systems and controls to support recognition and disclosure under the new guidance; however, at this time the Company is unable to determine the impact this standard will have on the financial statements and related disclosures.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). ASU 2016-13 changes how companies measure and recognize credit impairment for many financial assets. The new current expected credit loss model will require companies to immediately recognize an estimate of credit losses expected to occur over the remaining life of the financial assets that are in the scope of the standard. The ASU also makes targeted amendments to the current impairment model for available-for-sale debt securities. ASU 2016-13 will be required for reporting periods beginning after December 15, 2019. ASU 2016-13 will be applied in a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is implemented. The Company is currently assessing the future impact of ASU 2016-13.

In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220), as a result of concerns raised due to the TCJA. More specifically, because the remeasurement of deferred taxes due to the change in the federal corporate income tax rate is required to be included in income from continuing operations, the tax effects of items within AOCI (referred to as stranded tax effects) do not reflect the appropriate tax rate. ASU 2018-02 generally allows companies to reclassify stranded taxes from AOCI to retained earnings. The amount of the adjustment would be the difference between the historical federal corporate income tax rate of 35% and the newly enacted 21% federal corporate income tax rate. The provisions of ASU 2018-02 are effective for fiscal years and interim periods within that reporting period beginning after December 15, 2018. Early adoption is permitted, including adoption in any interim periods for reporting periods for which financial statements have not been issued. The Company is currently evaluating the impact of ASU 2018-02 and its impact on regulated utilities. At June 30, 2018, stranded taxes in AOCI are approximately $7.2 million.

Supplemental Cash Flow Disclosures (in thousands)
		Six Months Ended
		June 30,
		2018			2017
Cash paid (received) for:
	Interest on long-term debt and borrowings under the revolving credit facility	$	35,706		$	35,304
	Income tax paid, net	1,636			2,251
Non-cash investing and financing activities:
	Changes in accrued plant additions	(906		)	(9,105		)
	Grants of restricted shares of common stock	1,030			1,171
	Issuance of performance shares	1,499			932

9

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

B. Revenues

On January 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606), for all of its contracts using the modified retrospective method. There was no cumulative effect adjustment at the initial application of the new standard. In addition, comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company expects the ongoing impact of the new standard to be immaterial to net income and no significant changes in the Company's business processes and internal controls were necessary upon adoption of the new standard.

The following table disaggregates revenue from contracts with customers, for the three, six and twelve months ended June 30, 2018 (in thousands):

	June 30, 2018
	Three Months Ended		Six Months Ended		Twelve Months Ended
Retail	$	220,980	$	367,607	$	812,522
Wholesale	10,957		35,101		71,610
Wheeling (transmission)	4,147		8,433		17,732
Total revenues from contracts with customers	236,084		411,141		901,864
Other	712		1,368		4,264
Total operating revenues	$	236,796	$	412,509	$	906,128

The Company recognizes revenue when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. The Company has elected the optional invoice practical expedient for Wholesale and Wheeling revenues, as the invoice amount will correspond directly to the value provided by the Company's performance to date.

Retail. Retail contracts represent the Company's primary revenue source. The Company has determined that retail electric service to residential, commercial and industrial, and public authority customers represents an implied daily contract with the customer. The contract is comprised of an obligation to supply and distribute electricity and related capacity. Revenue is recognized, over time, equal to the product of the applicable tariff rates, as approved by the Public Utility Commission of Texas (the "PUCT") and the New Mexico Public Regulation Commission, (the "NMPRC"), and the volume of the electricity delivered to the customer, or through the passage of time based upon providing the service of standing ready. Unbilled revenues are recognized at month end based on estimated monthly generation volumes and by applying an average revenue per kWh to the number of estimated kWhs delivered but not billed to customers, and recorded as a receivable for the period following the last billing cycle to the end of the reporting period. Retail customers receive a bill monthly, with payment due sixteen days after issuance.

Wholesale. Wholesale contracts primarily include forward power sales into markets outside the Company’s service territory when the Company has competitive generation capacity available, after meeting its regulated service obligations. Pricing is either fixed or based on an index rate with consideration potentially including variable components. Uncertainties regarding the variable consideration will be resolved when the transaction price is known at the point of delivering the energy. The obligation to deliver the electricity is satisfied over time as the customer receives and consumes the electricity. Wholesale customers are invoiced on the 10^th day of each month, with payment due by the 20^th day of the month. In the case of the sale of renewable energy certificates, the transaction price is allocated to the performance obligation to deliver the confirmed quantity of the certificates based on the stand alone selling price of each certificate. Revenue is recognized as control of the certificates is transferred to the customer. The customer is invoiced upon the completed transfer of the certificates, with payment due within ten business days.Wholesalealso includes an annual agreement between the Company and one of its wholesale customers, Rio Grande Electric Cooperative ("RGEC"), which involves the provision of full requirements electric service from the Company to RGEC. The rates for this service are recalculated annually and require Federal Energy Regulatory Commission ("FERC") approval.

Wheeling (transmission). Wheeling involves the Company providing point-to-point transmission service, which includes the receipt of capacity and energy at designated point(s) and the transfer of such capacity and energy to designated point(s) of delivery on either a firm or non-firm basis for periods of one year or less. The performance obligation to provide capacity and transmit

10

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

energy is satisfied over time as the Company performs. Transmission customers are invoiced on a monthly basis, with payment due within twenty days of receipt of the invoice.

Other. Other includes alternative revenue program revenue relating to the Company’s potential bonus awards from the PUCT and the NMPRC mandated energy efficiency programs. Both the PUCT and the NMPRC allow for the potential to earn an incentive bonus if the Company achieves its approved energy efficiency goals under the applicable programs. The Company recognizes revenue related to the energy efficiency program incentives at the point in time that the amount is objectively determinable generally based upon an approved order from the regulator, is probable of recovery, and if it is expected to be collected within 24 months. Other revenue also includes (i) late payment fees, (ii) leasing income, and (iii) the Company’s allocated share, based on ownership, of sales of surplus effluent water from Palo Verde Generating Station ("Palo Verde").

Accounts receivable. Accounts receivable is principally comprised of revenue from contracts with customers. The Company recognizes expense for accounts that are deemed uncollectible in operating expense. The Company recognized $0.5 million, $1.0 million and $3.2 million of uncollectible expense for the three, six and twelve months endedJune 30, 2018, respectively.

11

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

C. Accumulated Other Comprehensive Income (Loss)

Upon adoption of ASU 2016-01, Financial Instruments-Overall, the Company recorded, on January 1, 2018, a cumulative effect adjustment, net of income taxes, to increase retained earnings by $41.0 million with an offset to AOCI. Changes in Accumulated Other Comprehensive Income (Loss) (net of tax) by component are presented below (in thousands):
		Three Months Ended June 30, 2018												Three Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Debt Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(18,475	)	$	(2,593	)	$	(11,253	)	$	(32,321	)	$	(24,457	)	$	32,872		$	(11,599	)	$	(3,184	)
	Other comprehensive income before reclassifications	—			(1,000		)	—			(1,000		)	—			3,558			—			3,558
	Amounts reclassified from accumulated other comprehensive income (loss)	(649		)	115			109			(425		)	(458		)	(4,134		)	85			(4,507		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)
		Six Months Ended June 30, 2018												Six Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(17,790	)	$	40,190		$	(11,342	)	$	11,058		$	(23,928	)	$	28,463		$	(11,651	)	$	(7,116	)
	Cumulative effect adjustment	—			(41,028		)	—			(41,028		)	—			—			—			—
	Other comprehensive income before reclassifications	—			(3,159		)	—			(3,159		)	—			9,723			—			9,723
	Amounts reclassified from accumulated other comprehensive income (loss)	(1,334		)	519			198			(617		)	(987		)	(5,890		)	137			(6,740		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)

12

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

		Twelve Months Ended June 30, 2018												Twelve Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)	$	(30,532	)	$	28,925		$	(11,693	)	$	(13,300	)
	Cumulative effect adjustment	—			(41,028		)	—			(41,028		)	—			—			—			—
	Other comprehensive income before reclassifications	7,951			7,369			—			15,320			7,363			12,661			—			20,024
	Amounts reclassified from accumulated other comprehensive income (loss)	(2,160		)	(2,115		)	370			(3,905		)	(1,746		)	(9,290		)	179			(10,857		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)

13

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

Amounts reclassified from Accumulated Other Comprehensive Income (Loss) for the three, six and twelve months ended June 30, 2018 and 2017 are as follows (in thousands):

Details about Accumulated Other Comprehensive Income (Loss) Components		Three Months Ended June 30,						Six Months Ended June 30,						Twelve Months Ended June 30,						Affected Line Item in the Statements of Operations
		2018			2017			2018			2017			2018			2017
Amortization of pension and post-retirement benefit costs:
	Prior service benefit	$	2,414		$	2,413		$	4,830		$	4,829		$	9,658		$	8,906		Miscellaneous non-operating income
	Net loss	(1,575		)	(1,694		)	(3,150		)	(3,388		)	(6,538		)	(5,908		)	Miscellaneous non-operating deductions
		839			719			1,680			1,441			3,120			2,998			Income (loss) before income taxes
	Income tax effect	(190		)	(261		)	(346		)	(454		)	(960		)	(1,252		)	Income tax (benefit) expense
		649			458			1,334			987			2,160			1,746			Net income (loss)
Marketable securities:
	Net realized gain (loss) on sale of securities	(147		)	5,166			(665		)	7,357			2,604			11,499			Investment and interest income, net
		(147		)	5,166			(665		)	7,357			2,604			11,499			Income (loss) before income taxes
	Income tax effect	32			(1,032		)	146			(1,467		)	(489		)	(2,209		)	Income tax (benefit) expense
		(115		)	4,134			(519		)	5,890			2,115			9,290			Net income (loss)
Loss on cash flow hedge:
	Amortization of loss	(140		)	(132		)	(279		)	(262		)	(549		)	(515		)	Interest on long-term debt and revolving credit facility
		(140		)	(132		)	(279		)	(262		)	(549		)	(515		)	Income (loss) before income taxes
	Income tax effect	31			47			81			125			179			336			Income tax (benefit) expense
		(109		)	(85		)	(198		)	(137		)	(370		)	(179		)	Net income (loss)
	Total reclassifications	$	425		$	4,507		$	617		$	6,740		$	3,905		$	10,857

14

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

D. Regulation

General

The rates and services of the Company are regulated by incorporated municipalities in Texas, the PUCT, the NMPRC, and the FERC. Municipal orders, ordinances and other agreements regarding rates and services adopted by Texas municipalities are subject to review and approval by the PUCT. The FERC has jurisdiction over the Company's wholesale (sales for resale) transactions, transmission service and compliance with federally-mandated reliability standards. The decisions of the PUCT, the NMPRC and the FERC are subject to judicial review.

Texas Regulatory Matters

2015 Texas Retail Rate Case Filing. On August 10, 2015, the Company filed with the City of El Paso, other municipalities incorporated in its Texas service territory, and the PUCT in Docket No. 44941, a request for an annual increase in non-fuel base revenues ("2015 Texas Retail Rate Case"). On July 21, 2016, the parties to PUCT Docket No. 44941 filed the Joint Motion to Implement Uncontested Amended and Restated Stipulation and Agreement which was unopposed by the parties. On August 25, 2016, the PUCT issued the PUCT Final Order in Docket No. 44941 ("2016 PUCT Final Order"). Interim rates associated with the annual non-fuel base rate increase became effective on April 1, 2016. The additional surcharges associated with the incremental Four Corners Generating Station ("Four Corners") costs, rate case expenses and the relate back of rates to consumption on and after January 12, 2016 through March 31, 2016, were implemented on October 1, 2016.

For financial reporting purposes, the Company deferred any recognition of the Company's request in its 2015 Texas Retail Rate Case until it received the 2016 PUCT Final Order on August 25, 2016. Accordingly, it reported in the third quarter of 2016 the cumulative effect of the 2016 PUCT Final Order, which related back to January 12, 2016.

2017 Texas Retail Rate Case Filing.On February 13, 2017, the Company filed with the City of El Paso, other municipalities incorporated in the Company's Texas service territory and the PUCT in Docket No. 46831, a request for an increase in non-fuel base revenues ("2017 Texas Retail Rate Case"). On November 2, 2017, the Company filed the Joint Motion to Implement Uncontested Stipulation and Agreement with the Administrative Law Judges for the 2017 Texas Retail Rate Case.

On December 18, 2017, the PUCT issued the PUCT Final Order in Docket No. 46831 ("2017 PUCT Final Order"), which provides, among other things, for the following: (i) an annual non-fuel base rate increase of $14.5 million; (ii) a return on equity of 9.65%; (iii) all new plant in service as filed in the Company's rate filing package was prudent and used and useful and therefore is included in rate base; (iv) recovery of the costs of decommissioning Four Corners in the amount of $5.5 million over a seven year period beginning August 1, 2017; (v) the Company to recover reasonable rate case expenses of approximately $3.4 million through a separate surcharge over a three year period; and (vi) a requirement that the Company file a refund tariff if the federal statutory income tax rate, as it relates to the Company, is decreased before the Company files its next rate case. The 2017 PUCT Final Order also established baseline revenue requirements for recovery of future transmission and distribution investment costs and includes a minimum monthly bill of $30.00 for new residential customers with distributed generation, such as private rooftop solar. Additionally, the 2017 PUCT Final Order allows for the annual recovery of $2.1 million of nuclear decommissioning funding and establishes annual depreciation expense that is approximately $1.9 million lower than the annual amount requested by the Company in its initial filing. Finally, the 2017 PUCT Final Order allows for the Company to recover revenues associated with the relate back of rates to consumption on and after July 18, 2017 through a separate surcharge.

New base rates, including additional surcharges associated with rate case expenses and the relate back of rates to consumption on and after July 18, 2017 through December 31, 2017, were implemented in January 2018.

For financial reporting purposes, the Company deferred any recognition of the Company's request in its 2017 Texas Retail Rate Case until it received the 2017 PUCT Final Order on December 18, 2017. Accordingly, it reported in the fourth quarter of 2017 the cumulative effect of the 2017 PUCT Final Order, which related back to July 18, 2017.

The 2017 PUCT Final Order required the Company to file a refund tariff if the federal statutory income tax rate, as it relates to the Company, were decreased before the Company files its next rate case. Following the enactment of the TCJA on December 22, 2017, and in compliance with the 2017 PUCT Final Order, on March 1, 2018, the Company filed with the PUCT and each of its municipalities a proposed refund tariff designed to reduce base charges for Texas customers equivalent to the expected annual decrease of $22.7 million in federal income tax expense resulting from the tax law changes. This filing was assigned PUCT Docket No. 48124. On March 27, 2018, the PUCT approved the Company's proposed refund tariff on an interim basis, subject to refund

15

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

or surcharge, for customer billing effective April 1, 2018. Each of the Company's municipalities also implemented the Company's proposed tax credits on an interim basis effective April 1, 2018. The refund will be reflected in rates over a period of a year and will be updated annually until new base rates are implemented pursuant to the Company's next rate case filing. No party requested a hearing in the case before the PUCT by the deadline of April 16, 2018, and on April 18, 2018, the PUCT Staff filed its final recommendation supporting approval of the Company's application. The Company filed an agreed proposed order for final approval on behalf of all parties except the City of El Paso on April 30, 2018, and on May 31, 2018, the City of El Paso filed a notice with the PUCT stating that the City Council had authorized agreement with the proposed order. The refund tariff case is pending with the refund tariff subject to a final order from the PUCT.

Energy Efficiency Cost Recovery Factor. On May 1, 2017, the Company filed its annual application, which was assigned PUCT Docket No. 47125, to establish its energy efficiency cost recovery factor for 2018. In addition to projected energy efficiency costs for 2018 and a reconciliation of collections to prior year actual costs, the Company requested approval of an incentive bonus for the 2016 energy efficiency program results in accordance with PUCT rules. Interim rates were approved effective January 1, 2018. The Company, the PUCT Staff, and the City of El Paso reached an agreement that includes an incentive bonus of $0.8 million. The agreement was filed on January 25, 2018, and was approved by the PUCT on February 15, 2018.

On May 1, 2018, the Company filed its annual application, which was assigned PUCT Docket No. 48332, to establish its energy efficiency cost recovery factor for 2019. In addition to projected energy efficiency costs for 2019 and a reconciliation to prior year actual costs, the Company requested approval of a $1.0 million incentive bonus for the 2017 energy efficiency program results in accordance with PUCT rules. A hearing on the merits of this case is scheduled to begin on September 5, 2018. The Company cannot predict the outcome of this matter at this time.

Fuel and Purchased Power Costs. The Company's actual fuel costs, including purchased power energy costs, are recovered from customers through a fixed fuel factor. The PUCT has adopted the fuel cost recovery rule (the "Texas Fuel Rule") that allows the Company to seek periodic adjustments to its fixed fuel factor. The Company can seek to revise its fixed fuel factor based upon the approved formula at least four months after its last revision except in the month of December. The Texas Fuel Rule requires the Company to request to refund fuel costs in any month when the over-recovery balance exceeds a threshold material amount and it expects fuel costs to continue to be materially over-recovered. The Texas Fuel Rule also permits the Company to seek to surcharge fuel under-recoveries in any month the balance exceeds a threshold material amount and it expects fuel cost recovery to continue to be materially under-recovered. Fuel over and under-recoveries are considered material when they exceed 4% of the previous twelve months' fuel costs. All such fuel revenue and expense activities are subject to periodic final review by the PUCT in periodic fuel reconciliation proceedings.

On November 30, 2016, the Company filed a request, which was assigned PUCT Docket No. 46610, to increase its fixed fuel factor by approximately 28.8% to reflect increased fuel expenses primarily related to an increase in the price of natural gas used to generate power. The increase in the fixed fuel factor was effective on an interim basis January 1, 2017 and approved by the PUCT on January 10, 2017.

On October 13, 2017, the Company filed a request, which was assigned PUCT Docket No. 47692, to decrease the Texas fixed fuel factor by approximately 19% to reflect decreased fuel expenses primarily related to a decrease in the price of natural gas used to generate power. The decrease in the Texas fixed fuel factor became effective beginning with the November 2017 billing month.

On April 13, 2018, the Company filed a request with the PUCT, which was assigned Docket No. 48264, to decrease the Texas fixed fuel factor by approximately 29% to reflect decreased fuel expenses primarily related to a decrease in the price of natural gas used to generate power. On April 25, 2018, the Company's proposed fuel factors were approved on an interim basis effective for the first billing cycle of the May 2018 billing month. The revised factor was approved by the PUCT and the docket closed on May 22, 2018. The Texas fixed fuel factor will continue thereafter until changed by the PUCT. As of June 30, 2018, the Company had a net fuel over-recovery balance of approximately $8.2 million in Texas.

Fuel Reconciliation Proceeding. On September 27, 2016, the Company filed an application with the PUCT, designated as PUCT Docket No. 46308, to reconcile $436.6 million of Texas fuel and purchased power expenses incurred during the period of April 1, 2013 through March 31, 2016. On June 29, 2017, the PUCT approved a settlement in this proceeding. The settlement provides for the reconciliation of fuel and purchased power costs incurred from April 1, 2013 through March 31, 2016. Additionally, the settlement modifies and tightens the Palo Verde performance rewards measurement bands beginning with the 2018 performance period. The financial results for each of the three, six and twelve-month periods ended June 30, 2017 include a $5.0 million, pre-tax increase to income reflecting the settlement of the Texas fuel reconciliation proceeding. This amount represents Palo Verde performance rewards associated with the 2013 to 2015 performance periods net of disallowed fuel and purchased power costs as

16

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

approved in the settlement. The April 1, 2016 through June 30, 2018 Texas jurisdictional fuel and purchased power costs subject to prudence review total approximately $304.3 million.

Community Solar. On June 8, 2015, the Company filed a petition with the PUCT to initiate a community solar program that includes the construction and ownership of a 3 Megawatts ("MW") solar photovoltaic system located at Montana Power Station ("MPS"). Participation is on a voluntary basis, and customers contract for a set capacity (Kilowatt ("kW")) amount and receive all energy produced. This case was assigned PUCT Docket No. 44800. The Company filed a settlement agreement among all parties on July 1, 2016, approving the program, and the PUCT approved the settlement agreement and program on September 1, 2016. On April 19, 2017, the Company announced that the entire 3 MW program was fully subscribed by approximately 1,500 Texas customers. The community solar facility began commercial operation on May 31, 2017.

On March 20, 2018, the Company filed a petition with the PUCT and each of its regulatory authorities to expand its community solar program to include 2 MW of solar powered generation from the 10 MW solar photovoltaic facility located at Newman Power Station ("Newman") and to reduce rates under the community solar tariff. The case before the PUCT was assigned Docket No. 48181 and is currently pending. The Company cannot predict the outcome of the case at this time.

Other Required Approvals. The Company has obtained other required approvals for tariffs and other approvals required by the Texas Public Utility Regulatory Act and the PUCT.

New Mexico Regulatory Matters

2015 New Mexico Rate Case Filing. On May 11, 2015, the Company filed a request with the NMPRC, in Case No. 15-00127-UT, for an annual increase in non-fuel base rates. On June 8, 2016, the NMPRC issued the NMPRC Final Order in Case No. 15-00127-UT (the "NMPRC Final Order"), which approved an annual increase in non-fuel base rates of approximately $0.6 million, an increase of approximately $0.5 million in other service fees and a decrease in the Company's allowed return on equity to 9.48%. The NMPRC Final Order concluded that all of the Company's new plant in service was reasonable and necessary and therefore would be recoverable in rates. The Company's rates were approved by the NMPRC effective July 1, 2016, and implemented at such time.

Future New Mexico Rate Case Filing. On April 12, 2017, the NMPRC issued an order in Case No. 15-00109-UT requiring the Company to make a rate filing in New Mexico no later than July 31, 2019, using an appropriate historical test year period.

New Mexico Order Commencing Review of the Effects of the TCJA on Regulated New Mexico Utilities. On January 24, 2018, the NMPRC initiated a proceeding in Case No. 18-00016-UT into the impact of the TCJA on New Mexico regulated utilities. On February 23, 2018, the Company responded to a NMPRC Staff inquiry regarding the proceeding. On April 4, 2018, the NMPRC issued an order requiring the Company to file a proposed interim rate rider to adjust the Company’s New Mexico base revenues in amounts equivalent to the Company’s reduced income tax expense for New Mexico customers resulting from the TCJA, to be implemented on or before May 1, 2018. The NMPRC order further requires that the Company record and track a regulatory liability for the excess accumulated deferred income taxes created by the change in the federal corporate income tax rate, consistent with the effective date of the TCJA, and subject to amortization determined by the NMPRC in the Company’s next general rate case. The Company recorded such a regulatory liability during the quarter ended December 31, 2017. On April 16, 2018, after consultation with the New Mexico Attorney General pursuant to the NMPRC order, the Company filed an interim rate rider with a proposed effective date of May 1, 2018. The annualized credits expected to be refunded to New Mexico customers approximate $4.9 million. On April 25, 2018, the NMPRC approved the Company's interim rate rider, which was implemented in customer bills beginning May 1, 2018.

Fuel and Purchased Power Costs. Historically, fuel and purchased power costs were recovered through base rates and a Fuel and Purchased Power Cost Adjustment Clause (the "FPPCAC") that accounts for changes in the costs of fuel relative to the amount included in base rates. Effective July 1, 2016, with the implementation of the NMPRC Final Order, fuel and purchased power costs are no longer recovered through base rates but are recovered through the FPPCAC. The Company's request to reconcile its fuel and purchased power costs for the period January 1, 2013 through December 31, 2014, also was approved in the NMPRC Final Order. New Mexico jurisdictional costs subject to prudence review are costs from January 1, 2015 through June 30, 2018 that total approximately $190.4 million. At June 30, 2018, the Company had a net fuel under-recovery balance of approximately $1.0 million in New Mexico. As required, the Company filed a request to continue use of its FPPCAC with the NMPRC on January 5, 2018, which was assigned Case No. 18-00006-UT. Hearings in the case began on July 30, 2018. The Company cannot predict the outcome of this case at this time.

17

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

5 MW Holloman Air Force Base ("HAFB") Facility Certificate of Convenience and Necessity ("CCN"). On October 7, 2015, in Case No. 15-00185-UT, the NMPRC issued a final order approving a CCN for a 5 MW solar power generation facility located on HAFB in the Company's service territory in New Mexico. The Company and HAFB negotiated a retail contract, which includes a power sales agreement for the facility, to replace the existing load retention agreement which was approved by NMPRC final order issued October 5, 2016 in Case No. 16-00224-UT. Construction of the solar generation facility is expected to be completed in the third quarter of 2018.

New Mexico Efficient Use of Energy Recovery Factor. On July 1, 2016, the Company filed its annual application requesting approval of its 2017 Energy Efficiency and Load Management Plan and to establish energy efficiency cost recovery factors for 2017. In addition to projected energy efficiency costs for 2017, the Company requested approval of a $0.4 million incentive for 2017 energy efficiency programs in accordance with NMPRC rules. This application was assigned Case No. 16-00185-UT. On February 22, 2017, the NMPRC issued a final order approving the Company’s 2017 Energy Efficiency and Load Management Plan and authorizing recovery in 2017 of a base incentive of $0.4 million. The Company’s energy efficiency cost recovery factors were approved and effective in customer bills beginning on March 1, 2017. NMPRC rules authorize continuation of the energy efficiency programs and incentive approved in Case No. 16-00185-UT through 2018.

On July 1, 2016, the Company filed its 2015 Annual Report for Energy Efficiency Programs, which included an incentive for verified 2015 program performance of $0.3 million, which was approved in Case No. 13-00176-UT. The Company recorded the $0.3 million approved incentive in operating revenues in the first quarter of 2017. In addition, on June 30, 2017, the Company filed its 2016 Annual Report for Energy Efficiency Programs, which included an incentive for verified 2016 program performance of $0.4 million that was approved in Case No. 13-00176-UT. The Company recorded the $0.4 million approved incentive in operating revenues in the third quarter of 2017.

On July 2, 2018, the Company filed its required application for approval of its 2019-2021 Energy Efficiency and Load Management Plan and cost recovery factor. The application includes a request for a base incentive of 7.1% of program expenditures, or approximately $0.4 million annually for 2019-2021. The application was assigned Case No. 18-00116-UT and is currently pending. The Company cannot predict the outcome of this case at this time.

Community Solar. On April 24, 2018, the Company filed an application with the NMPRC to initiate a community solar program to include construction and ownership of a 2 MW solar photovoltaic system located in Doña Ana County near the City of Las Cruces. Customer participation will be on a voluntary basis, and customers will contract for a set capacity (kW) amount and receive all energy produced by their subscribed capacity. The application was assigned Case No. 18-00099-UT and is currently pending. The Company cannot predict the outcome of this case at this time.

Issuance of Long-Term Debt, Securities Financing, and Guarantee of Debt. On October 7, 2015, the Company received approval in NMPRC Case No. 15-00280-UT to guarantee the issuance of up to $65.0 million of long-term debt by the Rio Grande Resources Trust II (the "RGRT") to finance future purchases of nuclear fuel and to refinance existing nuclear fuel debt obligations, which remains effective. Under this authorization, on June 28, 2018, the RGRT completed the sale of $65.0 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025 (the "RGRT Notes"). On October 4, 2017, the Company received additional approval in NMPRC Case No. 17-00217-UT to amend and extend the Company's Revolving Credit Facility (the "RCF"), issue up to $350.0 million in long-term debt and to redeem and refinance the $63.5 million 2009 Series A 7.25% Pollution Control Bonds and the $37.1 million 2009 Series B 7.25% Pollution Control Bonds, which have optional redemptions beginning in 2019. The NMPRC approval to issue $350.0 million in long-term debt supersedes its prior approval. Under this authorization, on June 28, 2018, the Company issued $125.0 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028. See Note L, Long-Term Debt and Financing Obligations.

Other Required Approvals. The Company has obtained other required approvals for tariffs and other approvals as required by the New Mexico Public Utility Act and the NMPRC.

Federal Regulatory Matters

Inquiry Regarding the Effect of the TCJA on Commission-Jurisdictional Rates and Order to Show Cause. On March 15, 2018, the FERC issued two show cause orders under Section 206 of the Federal Power Act and Rule 209(a) of the FERC’s Rules of Practice and Procedure, directing 48 individual public utilities with stated transmission rates or transmission formula rates with a fixed line item of 35% for the federal income tax component to, within 60 days of the date of the orders, either (1) propose revisions to their transmission rates under their open access transmission tariffs or transmission owner tariffs on file with the FERC, or (2) show cause why they should not be required to do so. The Company was included in the list of public utilities impacted by the FERC orders. On May 14, 2018, the Company submitted its response, as required by the FERC order, which demonstrated

18

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

that the reduced annual income tax does not cause the Company's total transmission revenues to become excessive and therefore no rate reduction was justified. Instead, the Company stated in its response that it will make preparations for a future filing in which it will seek approval for revised Open Access Transmission Tariff ("OATT") rates that would include the recovery of an increased total transmission revenue requirement from OATT customers based on current circumstances and appropriate forward-looking adjustments. The Company cannot predict the outcome of this matter at this time.

Issuance of Long-Term Debt, Securities Financing, and Guarantee of Debt. On October 31, 2017, the FERC issued an order in Docket No. ES17-54-000 approving the Company’s filing to (i) amend and extend the RCF; (ii) issue up to $350.0 million in long-term debt; (iii) guarantee the issuance of up to $65.0 million of long-term debt by the RGRT; and (iv) redeem and refinance the $63.5 million 2009 Series A 7.25% Pollution Control Bonds and the $37.1 million 2009 Series B 7.25% Pollution Control Bonds, which have optional redemptions beginning in 2019. The order also approved the Company's request to continue to utilize the Company's existing RCF with the ability to amend and extend at a future date. The authorization is effective from November 15, 2017 through November 14, 2019 and supersedes prior FERC approvals. Under this authorization, on June 28, 2018, the Company issued $125.0 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028 and the RGRT completed the sale of $65.0 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025. See Note L, Long-Term Debt and Financing Obligations.

Other Required Approvals. The Company has obtained required approvals for rates, tariffs and other approvals as required by the FERC.

E. Palo Verde

Spent Fuel and Waste Disposal. Pursuant to the Nuclear Waste Policy Act of 1982, as amended in 1987, the U.S. Department of Energy ("DOE") is legally obligated to accept and dispose of all spent nuclear fuel and other high-level radioactive waste generated by all domestic power reactors by 1998. The DOE's obligations are reflected in a contract for Disposal of Spent Nuclear Fuel and/or High Level Radioactive Waste with each nuclear power plant. The DOE failed to begin accepting spent nuclear fuel by 1998. Pursuant to the terms of the August 18, 2014 settlement agreement, and as amended with the DOE, Arizona Public Service Company ("APS") files annual claims for the period July 1 of the then-previous year to June 30 of the then-current year on behalf of itself and those utilities that share in power and energy entitlements, and bear certain allocated costs, with respect to Palo Verde pursuant to the Arizona Nuclear Power Project Participation Agreement dated August 23, 1973, as amended ("ANPP Participation Agreement").

Palo Verde Operations and Maintenance Expense. Included in "Operations and maintenance" in the Company's Statements of Operations are expenses associated with Palo Verde as follows (in thousands):

	2018		2017
Three months ended June 30,	$	24,977	$	25,931
Six months ended June 30,	47,152		47,539
Twelve months ended June 30,	98,977		98,062

19

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

F. Common Stock

Dividends. The Company paid $14.6 million and $13.6 million in quarterly cash dividends during the three months ended June 30, 2018 and 2017, respectively. The Company paid a total of $28.3 million and $55.4 million in quarterly cash dividends during the six and twelve months ended June 30, 2018, respectively. The Company paid a total of $26.2 million and $51.3 million in quarterly cash dividends during the six and twelve months ended June 30, 2017, respectively. On July 19, 2018 the Board of Directors declared a quarterly cash dividend of $0.36 per share payable on September 28, 2018 to shareholders of record as of the close of business on September 14, 2018.

Basic and Diluted Earnings Per Share. The basic and diluted earnings per share are presented below (in thousands except for share data):
	Three Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,517,713			40,409,030
Dilutive effect of unvested performance awards	130,086			116,555
Diluted number of common shares outstanding	40,647,799			40,525,585
Basic net income per common share:
Net income	$	33,295		$	36,066
Income allocated to participating restricted stock	(124		)	(142		)
Net income available to common shareholders	$	33,171		$	35,924
Diluted net income per common share:
Net income	$	33,295		$	36,066
Income reallocated to participating restricted stock	(124		)	(142		)
Net income available to common shareholders	$	33,171		$	35,924
Basic net income per common share:
Distributed earnings	$	0.36		$	0.335
Undistributed earnings	0.46			0.555
Basic net income per common share	$	0.82		$	0.890
Diluted net income per common share:
Distributed earnings	$	0.36		$	0.335
Undistributed earnings	0.46			0.555
Diluted net income per common share	$	0.82		$	0.890

20

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

	Six Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,504,526			40,398,192
Dilutive effect of unvested performance awards	113,519			101,152
Diluted number of common shares outstanding	40,618,045			40,499,344
Basic net income per common share:
Net income	$	26,329		$	32,077
Income allocated to participating restricted stock	(98		)	(119		)
Net income available to common shareholders	$	26,231		$	31,958
Diluted net income per common share:
Net income	$	26,329		$	32,077
Income reallocated to participating restricted stock	(98		)	(119		)
Net income available to common shareholders	$	26,231		$	31,958
Basic net income per common share:
Distributed earnings	$	0.695		$	0.645
Undistributed earnings (losses)	(0.045		)	0.145
Basic net income per common share	$	0.650		$	0.790
Diluted net income per common share:
Distributed earnings	$	0.695		$	0.645
Undistributed earnings (losses)	(0.045		)	0.145
Diluted net income per common share	$	0.650		$	0.790

21

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

	Twelve Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,467,231			40,381,776
Dilutive effect of unvested performance awards	126,818			85,219
Diluted number of common shares outstanding	40,594,049			40,466,995
Basic net income per common share:
Net income	$	92,513		$	112,369
Income allocated to participating restricted stock	(336		)	(423		)
Net income available to common shareholders	$	92,177		$	111,946
Diluted net income per common share:
Net income	$	92,513		$	112,369
Income reallocated to participating restricted stock	(336		)	(423		)
Net income available to common shareholders	$	92,177		$	111,946
Basic net income per common share:
Distributed earnings	$	1.365		$	1.265
Undistributed earnings	0.915			1.505
Basic net income per common share	$	2.280		$	2.770
Diluted net income per common share:
Distributed earnings	$	1.365		$	1.265
Undistributed earnings	0.905			1.505
Diluted net income per common share	$	2.270		$	2.770

The number of restricted stock awards and performance shares at 100% performance level excluded from the calculation of the diluted number of common shares outstanding because their effect was antidilutive is presented below:
	Three Months Ended		Six Months Ended		Twelve Months Ended
	June 30,		June 30,		June 30,
	2018	2017	2018	2017	2018	2017
Restricted stock awards	55,368	58,792	63,793	68,409	65,432	62,352
Performance shares (a)	—	—	22,989	—	11,494	6,906

________________________

(a) Certain performance shares were excluded from the computation of diluted earnings per share as no payouts would have been required based upon performance at the end of each corresponding period.

22

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

G. Income Taxes

The Company files income tax returns in the U.S. federal jurisdiction and in the states of Texas, New Mexico and Arizona. The Company is no longer subject to tax examination by the taxing authorities in the federal, Texas, Arizona, and New Mexico jurisdictions for years prior to 2013.

For the three months ended June 30, 2018 and 2017, the Company’s effective tax rate was 24.4% and 35.4%, respectively. For the six months ended June 30, 2018 and 2017, the Company’s effective tax rate was 22.7% and 35.3%, respectively. For the twelve months ended June 30, 2018 and 2017, the Company's effective tax rate was 30.8% and 36.0%, respectively. The federal statutory tax rate is 21% in 2018 and 35% in 2017. The Company's effective tax rates for all periods in 2018 and 2017 differ from the federal statutory tax rate primarily due to capital gains in the decommissioning trusts which are taxed at the federal rate of 20%, the tax benefit of stock incentive plans, the allowance for equity funds used during construction ("AEFUDC"), and state taxes.

The results for the three, six and twelve months ended June 30, 2018, contain provisional estimates of the impact of the TCJA. These amounts are considered provisional because they use estimates for which tax returns have not yet been filed and because estimated amounts may be impacted by future regulatory and accounting guidance if and when issued. The Company will adjust these provisional amounts as further information becomes available and as we refine our calculations. As permitted by recent guidance issued by the SEC, these adjustments will occur during a reasonable “measurement period” not to exceed twelve months from the date of enactment.

In February 2018, the FASB issued ASU 2018-02. The Company is currently evaluating the impact of ASU 2018-02 and its impact on regulated utilities. See Note A, Principles of Preparation - New Accounting Standards to be Adopted in the Future, for additional information.

H. Commitments, Contingencies and Uncertainties

For a full discussion of commitments and contingencies, see Note K of the Notes to Financial Statements in the 2017 Form 10-K. In addition, see Notes D and E above and Notes C and E of the Notes to Financial Statements in the 2017 Form 10-K regarding matters related to wholesale power sales contracts and transmission contracts subject to regulation and Palo Verde, including decommissioning, spent nuclear fuel and waste disposal, and liability and insurance matters.

Power Purchase and Sale Contracts

To supplement its own generation and operating reserve requirements and to meet required renewable portfolio standards, the Company engages in power purchase arrangements that may vary in duration and amount based on an evaluation of the Company's resource needs, the economics of the transactions and specific renewable portfolio requirements. For a discussion of power purchase and sale contracts that the Company has entered into with various counterparties, see Note K of the Notes to Financial Statements in the 2017 Form 10-K.

Environmental Matters

General. The Company is subject to extensive laws, regulations and permit requirements with respect to air and greenhouse gas emissions, water discharges, soil and water quality, waste management and disposal, natural resources and other environmental matters by federal, state, regional, tribal and local authorities. Failure to comply with such laws, regulations and requirements can result in actions by authorities or other third parties that might seek to impose on the Company administrative, civil and/or criminal penalties or other sanctions. In addition, releases of pollutants or contaminants into the environment can result in costly cleanup liabilities. These laws, regulations and requirements are subject to change through modification or reinterpretation, or the introduction of new laws and regulations, and as a result, the Company may face additional capital and operating costs to comply.

23

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

I. Litigation

The Company is involved in various legal, environmental, tax and regulatory proceedings before various courts, regulatory commissions and governmental agencies regarding matters arising in the ordinary course of business. In many of these matters, the Company has excess casualty liability insurance that covers the various claims, actions and complaints. The Company regularly analyzes current information and, as necessary, makes provisions in its financial statements for probable liabilities for the eventual disposition of these matters. While the outcome of these matters cannot be predicted with certainty, based upon a review of the matters and applicable insurance coverage, the Company believes that none of these matters will have a material adverse effect on the financial position, results of operations or cash flows of the Company. The Company expenses legal costs, including expenses related to loss contingencies, as they are incurred.

See Notes D and H above and Notes C and K of the Notes to Financial Statements in the 2017 Form 10-K for discussion of the effects of government legislation and regulation on the Company.

J. Employee Benefits

The Company adopted ASU 2017-07, Compensation-Retirement Benefits, effective January 1, 2018. Upon adoption of the new standard, the service cost is included in "Operations and maintenance" in the Company's Statements of Operations. The expected return on plan assets is included in "Investment and interest income, net". The amortization of prior service benefit and amortization of gains are included in "Miscellaneous non-operating income". The amortization of prior service cost and amortization of losses are included in "Miscellaneous non-operating deductions". The interest cost component of net periodic benefit cost is included in "Other interest".

The provisions in ASU 2017-07 were applied retrospectively for the income statement presentation of the service cost component and the other components of net benefit costs. The Company elected to apply the practical expedient and used the amounts disclosed in its pension and other postretirement benefit plan note for the 2017 comparative period as the estimation basis for applying the retrospective presentation requirements. The Company reclassified $2.0 million to "Operations and maintenance" in the Company’s Statement of Operations for the three months ended June 30, 2017 by increasing (i) "Investment and interest income, net" by $5.2 million, (ii) "Miscellaneous non-operating income" by $2.9 million, (iii) "Miscellaneous non-operating deductions" by $2.1 million, and (iv) "Other interest" by $4.0 million. As a result of the reclassifications, "Operations and maintenance" increased to $2.5 million in service cost from the $0.5 million in net periodic benefit cost previously reported.

The Company reclassified $4.1 million to "Operations and maintenance" in the Company’s Statement of Operations for the six months ended June 30, 2017 by increasing (i) "Investment and interest income, net" by $10.5 million, (ii) "Miscellaneous non-operating income" by $5.7 million, (iii) "Miscellaneous non-operating deductions" by $4.2 million, and (iv) "Other interest" by $7.9 million. As a result of the reclassifications, "Operations and maintenance" increased to $5.4 million in service cost from the $1.3 million in net periodic benefit cost previously reported.

The Company reclassified $8.1 million to "Operations and maintenance" in the Company’s Statement of Operations for the twelve months ended June 30, 2017 by increasing (i) "Investment and interest income, net" by $20.9 million, (ii) "Miscellaneous non-operating income" by $10.8 million, (iii) "Miscellaneous non-operating deductions" by $7.8 million, and (iv) "Other interest" by $15.8 million. As a result of the reclassifications, "Operations and maintenance" increased to $10.9 million in service cost from the $2.8 million in net periodic benefit cost previously reported.

24

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

Retirement Plans

The net periodic benefit cost recognized for the three, six and twelve months endedJune 30, 2018 and 2017, is made up of the components listed below as determined using the projected unit credit actuarial cost method (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Components of net periodic benefit cost:
Service cost	$	2,757		$	1,989		$	5,515		$	4,259		$	9,774		$	8,450
Interest cost	3,222			3,282			6,445			6,530			12,974			13,039
Expected return on plan assets	(5,315		)	(4,787		)	(10,630		)	(9,595		)	(20,224		)	(19,049		)
Amortization of:
Net loss	2,100			2,138			4,200			4,227			8,427			7,791
Prior service benefit	(877		)	(875		)	(1,755		)	(1,753		)	(3,508		)	(3,504		)
Net periodic benefit cost	$	1,887		$	1,747		$	3,775		$	3,668		$	7,443		$	6,727

During the six months endedJune 30, 2018, the Company contributed $5.8 million of its projected $9.4 million2018 annual contribution to its retirement plans.

Other Postretirement Benefits

The net periodic benefit recognized for the three, six and twelve months endedJune 30, 2018 and 2017, is made up of the components listed below (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Components of net periodic benefit:
Service cost	$	700		$	530		$	1,400		$	1,118		$	2,518		$	2,457
Interest cost	565			684			1,130			1,362			2,491			2,784
Expected return on plan assets	(612		)	(483		)	(1,225		)	(953		)	(2,179		)	(1,868		)
Amortization of:
Prior service benefit	(1,537		)	(1,538		)	(3,075		)	(3,076		)	(6,150		)	(5,402		)
Net gain	(525		)	(444		)	(1,050		)	(839		)	(1,889		)	(1,883		)
Net periodic benefit	$	(1,409	)	$	(1,251	)	$	(2,820	)	$	(2,388	)	$	(5,209	)	$	(3,912	)

During the six months endedJune 30, 2018, the Company contributed $0.2 million of its projected $0.5 million2018 annual contribution to its other postretirement benefits plan.

K. Financial Instruments and Investments

The FASB guidance requires the Company to disclose estimated fair values for its financial instruments. The Company has determined that cash and temporary investments, investment in debt securities, accounts receivable, decommissioning trust funds, long-term debt, short-term borrowings under the Company's RCF, accounts payable and customer deposits meet the definition of financial instruments. The carrying amounts of cash and temporary investments, accounts receivable, accounts payable and customer deposits approximate fair value because of the short maturity of these items. Investments in debt securities and decommissioning trust funds are carried at estimated fair value.

25

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

Long-Term Debt and Short-Term Borrowings Under the RCF. The fair values of the Company's long-term debt and short-term borrowings under the RCF are based on estimated market prices for similar issues and are presented below (in thousands):

	June 30, 2018				December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Pollution Control Bonds	$	157,723	$	165,349	$	157,676	$	169,186
Senior Notes (1)	1,117,914		1,252,149		993,426		1,211,922
RGRT Senior Notes (1)(2)	109,517		111,650		44,886		47,070
RCF (2)	80,445		80,445		173,533		173,533
Total	$	1,465,599	$	1,609,593	$	1,369,521	$	1,601,711

_______________

(1) On June 28, 2018, the Company issued $125 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028 and guaranteed the issuance by the RGRT of $65 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025. See Note L, Long-Term Debt and Financing Obligations.

(2) Nuclear fuel financing, as of June 30, 2018 and December 31, 2017, is funded through $110 million and $45 million RGRT Senior Notes and $24.4 million and $88.5 million, respectively, under the RCF. As of June 30, 2018 and December 31, 2017, $56.0 million and $85.0 million, respectively, was outstanding under the RCF for working capital or general corporate purposes. The interest rate on the Company's borrowings under the RCF is reset throughout the quarter reflecting current market rates. Consequently, the carrying value approximates fair value.

Marketable Securities.The Company's marketable securities, included in decommissioning trust funds in the balance sheets, are reported at fair value which was $287.1 million and $286.9 million at June 30, 2018 and December 31, 2017, respectively. The investments in the Company's Palo Verde nuclear decommissioning trust funds ("NDT") are classified as available for sale debt securities, equity securities and cash and cash equivalents. These investments are recorded at their estimated fair value in accordance with FASB guidance for certain investments in debt and equity securities. On January 1, 2018, the Company adopted ASU 2016-01, Financial Instruments-Overall, which eliminates the requirements to classify investments in equity securities with readily determinable fair values as trading or available for sale and requires entities to recognize changes in fair value for these securities in net income as reported in the Statements of Operations. ASU 2016-01 requires a modified-retrospective approach and therefore, comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.

The reported fair values include gross unrealized losses on securities classified as available for sale whose impairment the Company has deemed to be temporary. The tables below present the gross unrealized losses and the fair value of these securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	June 30, 2018
	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Description of Securities (1):
Federal Agency Mortgage Backed Securities	$	11,527	$	(169	)	$	10,180	$	(460	)	$	21,707	$	(629	)
U.S. Government Bonds	34,018		(1,178		)	17,625		(1,298		)	51,643		(2,476		)
Municipal Debt Obligations	5,442		(138		)	6,953		(600		)	12,395		(738		)
Corporate Debt Obligations	26,696		(950		)	3,140		(325		)	29,836		(1,275		)
Total	$	77,683	$	(2,435	)	$	37,898	$	(2,683	)	$	115,581	$	(5,118	)

_________________

(1) Includes 158 securities.

26

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

	December 31, 2017
	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Description of Securities (2):
Federal Agency Mortgage Backed Securities	$	4,700	$	(46	)	$	10,099	$	(165	)	$	14,799	$	(211	)
U.S. Government Bonds	28,866		(416		)	18,186		(969		)	47,052		(1,385		)
Municipal Debt Obligations	4,290		(73		)	9,736		(742		)	14,026		(815		)
Corporate Debt Obligations	10,685		(107		)	4,475		(331		)	15,160		(438		)
Total Debt Securities	48,541		(642		)	42,496		(2,207		)	91,037		(2,849		)
Domestic Equity Securities	962		(210		)	—		—			962		(210		)
Total	$	49,503	$	(852	)	$	42,496	$	(2,207	)	$	91,999	$	(3,059	)

_________________

(2) Includes 146 securities.

The Company monitors the length of time specific securities trade below their cost basis along with the amount and percentage of the unrealized loss in determining if a decline in fair value below recorded cost of debt securities classified as available for sale is considered to be other than temporary. The Company recognizes impairment losses on certain of its available for sale debt securities deemed to be other than temporary. In accordance with the FASB guidance, these impairment losses are recognized in net income, and a lower cost basis is established for these securities. In addition, the Company will research the future prospects of individual securities as necessary. The Company does not anticipate expending monies held in trust before 2044 or a later period when decommissioning of Palo Verde begins.

For the three, six and twelve months ended June 30, 2018 and 2017, the Company recognized other than temporary impairment losses on its available-for-sale securities as follows (in thousands):

	Three Months Ended				Six Months Ended				Twelve Months Ended
	June 30,				June 30,				June 30,
	2018		2017		2018		2017		2018		2017
Unrealized holding losses included in pre-tax income	$	—	$	—	$	—	$	—	$	—	$	(196	)

Investments categorized as available for sale securities also include gross unrealized gains which have not been recognized in the Company's net income. The table below presents the unrecognized gross unrealized gains and the fair value of these securities, aggregated by investment category (in thousands): 

	June 30, 2018				December 31, 2017
	Fair Value		Unrealized Gains		Fair Value		Unrealized Gains
Description of Securities:
Federal Agency Mortgage Backed Securities	$	2,758	$	96	$	5,933	$	203
U.S. Government Bonds	1,890		88		11,129		256
Municipal Debt Obligations	1,232		84		2,558		109
Corporate Debt Obligations	7,666		339		19,514		1,067
Total Debt Securities	13,546		607		39,134		1,635
Domestic Equity Securities	—		—		120,065		45,587
International Equity Securities	—		—		28,804		5,908
Cash and Cash Equivalents	—		—		6,864		—
Total	$	13,546	$	607	$	194,867	$	53,130

27

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

The Company's marketable securities include investments in mortgage backed securities, municipal, corporate and federal debt obligations. The contractual year for maturity of these available-for-sale debt securities as of June 30, 2018, is as follows (in thousands):

	Total		2018		2019 through 2022		2023 through 2027		2028 and Beyond
Federal Agency Mortgage Backed Securities	$	24,465	$	—	$	15	$	245	$	24,205
U.S. Government Bonds	53,533		1,886		28,137		10,872		12,638
Municipal Debt Obligations	13,627		121		5,492		5,789		2,225
Corporate Debt Obligations	37,502		—		17,303		8,471		11,728

The Company's available for sale securities in the NDT are sold from time to time and the Company uses the specific identification basis to determine the amount to reclassify from AOCI into net income. The proceeds from the sale of these securities during the three, six and twelve months ended June 30, 2018 and 2017, and the related effects on pre-tax income are as follows (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Proceeds from sales or maturities of available-for-sale securities	$	2,608		$	36,476		$	14,365		$	62,531		$	48,871		$	113,087
Gross realized gains included in pre-tax income	$	—		$	5,322		$	9		$	7,909		$	3,873		$	12,880
Gross realized losses included in pre-tax income	(147		)	(156		)	(674		)	(552		)	(1,269		)	(1,185		)
Gross unrealized losses included in pre-tax income	—			—			—			—			—			(196		)
Net gains (losses) included in pre-tax income	$	(147	)	$	5,166		$	(665	)	$	7,357		$	2,604		$	11,499

Upon the adoption of ASU 2016-01, Financial Instruments-Overall, on January 1, 2018, the Company records, on a modified-retrospective basis, changes in fair market value for equity securities held in the NDT in the Statements of Operations. The unrealized gains and losses recognized during the three and six months ended, June 30, 2018 and related effects on pre-tax income are as follows (in thousands):

	Three Months Ended		Six Months Ended
	June 30, 2018
Net gains and (losses) recognized on equity securities	$	3,249	$	1,258
Less: Net gains and (losses) recognized on equity securities sold	2,266		4,056
Unrealized gains and (losses) recognized on equity securities still held at reporting date	$	983	$	(2,798	)

Fair Value Measurements. The FASB guidance requires the Company to provide expanded quantitative disclosures for financial assets and liabilities recorded on the balance sheet at fair value. Financial assets carried at fair value include the Company's decommissioning trust investments and investments in debt securities which are included in deferred charges and other assets on the Balance Sheets. The Company has no liabilities that are measured at fair value on a recurring basis. The FASB guidance establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels as follows:

• Level 1 – Observable inputs that reflect quoted market prices for identical assets and liabilities in active markets. Financial assets utilizing Level 1 inputs include the NDT investments in active exchange-traded equity securities, mutual funds and U.S. Treasury securities that are in a highly liquid and active market. The Institutional Funds are valued using the

28

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

Net Asset Value ("NAV") provided by the administrator of the fund. The NAV price is quoted on a restrictive market although the underlying investments are traded on active markets. The NAV used for determining the fair value of the Institutional Funds-International Equity investments have readily determinable fair values. Accordingly, such fund values are categorized as Level 1.

• Level 2 – Inputs other than quoted market prices included in Level 1 that are observable for the asset or liability either directly or indirectly. Financial assets utilizing Level 2 inputs include the NDT investments in fixed income securities. The fair value of these financial instruments is based on evaluated prices that reflect observable market information, such as actual trade information of similar securities, adjusted for observable differences.

• Level 3 – Unobservable inputs using data that is not corroborated by market data and primarily based on internal Company analysis using models and various other analysis. Financial assets utilizing Level 3 inputs are the Company's investment in debt securities.

The securities in the NDT are valued using prices and other relevant information generated by market transactions involving identical or comparable securities. The FASB guidance identifies this valuation technique as the "market approach" with observable inputs. The Company analyzes available-for-sale securities to determine if losses are other than temporary.

The fair value of the NDT and investments in debt securities at June 30, 2018 and December 31, 2017, and the level within the three levels of the fair value hierarchy defined by the FASB guidance are presented in the table below (in thousands):

Description of Securities	Fair Value as of June 30, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Trading Securities:
Investments in Debt Securities	$	1,697	$	—	$	—	$	1,697
Equity Securities:
Domestic	$	123,756	$	123,756	$	—	$	—
International	27,868		27,868		—		—
Total Equity Securities	151,624		151,624		—		—
Available for Sale Debt Securities:
Federal Agency Mortgage Backed Securities	24,465		—		24,465		—
U.S. Government Bonds	53,533		53,533		—		—
Municipal Debt Obligations	13,627		—		13,627		—
Corporate Debt Obligations	37,502		—		37,502		—
Total Available for Sale Debt Securities	129,127		53,533		75,594		—
Cash and Cash Equivalents	6,375		6,375		—		—
Total	$	287,126	$	211,532	$	75,594	$	—

29

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

Description of Securities	Fair Value as of December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Trading Securities:
Investments in Debt Securities	$	1,735	$	—	$	—	$	1,735
Available for Sale:
Federal Agency Mortgage Backed Securities	$	20,732	$	—	$	20,732	$	—
U.S. Government Bonds	58,181		58,181		—		—
Municipal Debt Obligations	16,584		—		16,584		—
Corporate Debt Obligations	34,674		—		34,674		—
Subtotal, Debt Securities	130,171		58,181		71,990		—
Domestic	121,027		121,027		—		—
International	28,804		28,804		—		—
Subtotal, Equity Securities	149,831		149,831		—		—
Cash and Cash Equivalents	6,864		6,864		—		—
Total	$	286,866	$	214,876	$	71,990	$	—

There were no transfers in or out of Level 1 and Level 2 fair value measurements categories due to changes in observable inputs during the three, six and twelve months ended June 30, 2018 and 2017. There were no purchases, sales, issuances and settlements related to the assets in the Level 3 fair value measurement category during the three, six and twelve months endedJune 30, 2018 and 2017.

30

EL PASO ELECTRIC COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

L. Long-Term Debt and Financing Obligations

$125 Million Senior Notes. On June 28, 2018, the Company entered into a Note Purchase Agreement (the "Agreement") with several institutional purchasers under which the Company issued and sold $125 million aggregate principal amount of 4.22% Senior Notes due August 15, 2028 (the "Notes"). The net proceeds from the issuance of these senior notes were used to repay outstanding short-term borrowings under the RCF for working capital and general corporate purposes. The Company will pay interest on the Notes semi-annually on February 15 and August 15 of each year until maturity, beginning on February 15, 2019.

The Company may redeem the Notes, in whole or in part, at any time at a redemption price equal to 100% of the principal amount to be redeemed together with the interest on such principal amount accrued to the date of redemption, plus a make-whole amount based on the prevailing market interest rates.

$65 Million RGRT Senior Notes. On June 28, 2018, the RGRT, a Texas grantor trust through which the Company finances its portion of nuclear fuel for Palo Verde, and the Company entered into a Note Purchase Agreement (the "RGRT Agreement") with several institutional purchasers. Under the terms of the RGRT Agreement, the RGRT issued and sold $65 million aggregate principal amount of 4.07% Senior Notes due August 15, 2025 (the "RGRT Notes"). The net proceeds from the RGRT Notes were used to repay outstanding short-term borrowings under the RCF to finance nuclear fuel purchases. The Company guaranteed the payment of principal and interest on the RGRT Notes. RGRT’s assets, liabilities and operations are consolidated in the Company’s financial statements and the RGRT Notes are included as long-term debt on the balance sheet. The RGRT will pay interest on the RGRT Notes semi-annually on February 15 and August 15 of each year until maturity, beginning on February 15, 2019.

The RGRT may redeem the RGRT Notes, in whole or in part, at any time at a redemption price equal to 100% of the principal amount to be redeemed together with the interest on such principal amount accrued to the date of redemption, plus a make-whole amount based on the prevailing market interest rates.

The issuance sale of both the Notes and the RGRT Notes was made in reliance on a private placement exemption from the registration provisions of the Securities Act of 1933, as amended.

31

Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Directors

El Paso Electric Company:

Results of Review of Interim Financial Information

We have reviewed the balance sheet of El Paso Electric Company (the "Company") as of June 30, 2018, the related statements of operations and comprehensive operations for the three-month, six-month, and twelve-month periods endedJune 30, 2018 and 2017, the related statements of cash flows for the six-month periods ended June 30, 2018 and 2017, and the related notes (collectively, the interim financial information). Based on our reviews, we are not aware of any material modifications that should be made to the interim financial information for it to be in conformity with U.S. generally accepted accounting principles.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the balance sheet of the Company as of December 31, 2017, and the related statements of operations and comprehensive operations, changes in common stock equity, and cash flows for the year then ended (not presented herein); and in our report dated February 28, 2018, we expressed an unqualified opinion on those financial statements. In our opinion, the information set forth in the accompanying balance sheet as of December 31, 2017, is fairly stated, in all material respects, in relation to the balance sheet from which it has been derived.

Basis for Review Results

This interim financial information is the responsibility of the Company’s management. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our reviews in accordance with the standards of the PCAOB. A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the PCAOB, the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

/s/ KPMG LLP

Houston, Texas

August 3, 2018

32

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The information contained in this Item 2 updates, and should be read in conjunction with, the information set forth in Part II, Item 7 of the 2017 Form 10-K.

FORWARD-LOOKING STATEMENTS

Certain matters discussed in this Quarterly Report on Form 10-Q, other than statements of historical fact, are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Forward-looking statements often include words like "believe", "anticipate", "target", "project", "expect", "predict", "pro forma", "estimate", "intend", "will", "is designed to", "plan", and words of similar meaning, or are indicated by the Company's discussion of strategies or trends. Forward-looking statements describe the Company's future plans, objectives, expectations or goals. Although the Company believes that the expectations reflected in such forward-looking statements are reasonable, no assurances can be given that these expectations will prove to be correct. Such statements address future events and conditions and include, but are not limited to:

• capital expenditures,

• earnings,

• liquidity and capital resources,

• ratemaking/regulatory matters,

• litigation,

• accounting matters, including accounting for taxes,

• possible corporate restructurings, acquisitions and dispositions,

• compliance with debt and other restrictive covenants,

• interest rates and dividends,

• environmental matters,

• nuclear operations,

• operation of the Company's generating units and its transmission and distribution systems, and

• the overall economy of the Company's service area.

These forward-looking statements are based on assumptions and analyses in light of the Company's experience and perception of historical trends, current conditions, expected future developments, and other factors the Company believes were appropriate in the circumstances when the statements were made. Forward-looking statements by their nature involve substantial risks and uncertainties that could significantly impact expected results, and actual future results could differ materially from those described in such statements. While it is not possible to identify all factors, the Company continues to face many risks and uncertainties. Factors that would cause or contribute to such differences include, but are not limited to:

• actions of the Company's regulators,

• the Company's ability to fully and timely recover its costs and earn a reasonable rate of return on its invested capital through the rates that it is permitted to charge,

• rates, cost recovery mechanisms and other regulatory matters including the ability to recover fuel costs on a timely basis,

• the ability of the Company's operating partners to maintain plant operations and manage O&M costs at Palo Verde, including costs to comply with any new or expanded regulatory or environmental requirements,

• reductions in output at generation plants operated by the Company,

• the size of the Company's construction program and its ability to complete construction on budget and on time,

• the Company's reliance on significant customers,

• the credit worthiness of the Company's customers,

33

• unscheduled outages of generating units including outages at Palo Verde,

• changes in customers' demand for electricity as a result of energy efficiency initiatives and emerging competing services and technologies, including distributed generation and battery storage,

• individual customer groups, including distributed generation customers, may not pay their full cost of service, and other customers may or may not be required to pay the difference,

• changes in, and the assumptions used for, pension and other post-retirement and post-employment benefit liability calculations, as well as actual and assumed investment returns on pension plan and other post-retirement plan assets,

• the impact of changing cost escalation and other assumptions on the Company's nuclear decommissioning liability for Palo Verde, as well as actual and assumed investment returns on assets in the NDT,

• disruptions in the Company's transmission system, and in particular the lines that deliver power from its remote generating facilities,

• the sufficiency of the Company's insurance coverage, including availability, cost, coverage and terms,

• electric utility deregulation or re-regulation,

• regulated and competitive markets,

• ongoing municipal, state and federal activities,

• cuts in military spending or prolonged shutdowns of the federal government that reduce demand for the Company's services from military and governmental customers,

• political, legislative, judicial and regulatory developments,

• homeland security considerations, including those associated with the U.S./Mexico border region and the energy industry,

• changes in environmental laws and regulations and the enforcement or interpretation thereof, including those related to air, water or greenhouse gas emissions or other environmental matters,

• economic, commercial bank, financial and capital market conditions,

• actions by credit rating agencies,

• changes in accounting requirements and other accounting matters,

• changing weather trends and the impact of severe weather conditions,

• possible physical or cyber attacks, intrusions or other catastrophic events,

• the impact of lawsuits filed against the Company,

• the impact of changes in interest rates or rates of inflation,

• Texas, New Mexico and electric industry utility service reliability standards,

• uranium, natural gas, oil and wholesale electricity prices and availability,

• possible income tax and interest payments as a result of audit adjustments proposed by the U.S. Internal Revenue Service ("IRS") or state taxing authorities,

• the impact of recent changes to U.S. tax laws,

• the impact of U.S. health care reform legislation,

• the effectiveness of the Company's risk management activities,

• loss of key personnel, the Company's ability to recruit and retain qualified employees and the Company's ability to successfully implement succession planning, and

• other circumstances affecting anticipated operations, sales and costs.

These lists are not all-inclusive because it is not possible to predict all factors. A discussion of some of these factors is included in the 2017 Form 10-K under the headings “Risk Factors” and “Management's Discussion and Analysis of Financial Condition and Results of Operations - Summary of Critical Accounting Policies and Estimates" and “Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources”. This Quarterly Report on Form

34

10-Q should be read in its entirety. Management cautions against putting undue reliance on forward-looking statements or projecting any future results based on such statements or present or prior earnings levels. Any forward-looking statement speaks only as of the date such statement was made, and the Company is not obligated to update any forward-looking statement to reflect events or circumstances after the date on which such statement was made, except as required by applicable laws or regulations.

Summary of Critical Accounting Policies and Estimates

The preparation of our financial statements requires management to make estimates and assumptions that affect the amounts reported in the financial statements and related notes for the periods presented and actual results could differ in future periods from those estimates. Critical accounting policies and estimates are both important to the portrayal of our financial condition and results of operations and require complex, subjective judgments and are more fully described in the "Management's Discussion and Analysis of Financial Condition and Results of Operations" in the 2017 Form 10-K.

Summary

The following is an overview of our results of operations for the three, six and twelve-month periods ended June 30, 2018 and 2017. Net income and basic earnings per share for the three, six and twelve-month periods ended June 30, 2018 and 2017, are shown below:

	Three Months Ended				Six Months Ended				Twelve Months Ended
	June 30,				June 30,				June 30,
	2018		2017		2018		2017		2018		2017
Net income (in thousands)	$	33,295	$	36,066	$	26,329	$	32,077	$	92,513	$	112,369
Basic earnings per share	0.82		0.89		0.65		0.79		2.28		2.77

The following table shows the primary factors affecting the after-tax change in net income between the 2018 and 2017 periods presented (in thousands):

	Three Months Ended			Six Months Ended			Twelve Months Ended
June 30, 2017 net income	$	36,066		$	32,077		$	112,369
Change in (net of tax at 21%):
Palo Verde performance rewards, net (a)	(3,954		)	(3,954		)	(3,954		)
Increased operation and maintenance at fossil-fuel generating plants (b)	(3,668		)	(1,042		)	(456		)
Decreased investment and interest income, NDT (c)	(1,474		)	(5,105		)	(5,653		)
Increased depreciation and amortization (d)	(1,156		)	(2,641		)	(9,942		)
Deregulated Palo Verde Unit 3 (e)	(509		)	(762		)	(725		)
Decreased wheeling revenues (f)	(316		)	(301		)	(2,784		)
(Increased) decreased taxes other than income taxes (g)	(91		)	85			(1,865		)
Effective tax rate, other (h)	6,500			6,460			13,270
Increased (decreased) retail non-fuel base revenues (i)	1,765			2,023			(6,205		)
Other	132			(511		)	(1,542		)
June 30, 2018 net income	$	33,295		$	26,329		$	92,513

______________

All information presented below is expressed in pre-tax amounts except when stated otherwise.

(a) Palo Verde performance rewards of $5.0 million, associated with the 2013 to 2015 performance periods, net of disallowed fuel and purchased power costs related to the resolution of the Texas fuel reconciliation proceeding designated as PUCT Docket No. 46308 for the period from April 2013 through March 2016, were recorded in June 2017, with no comparable amount in the three, six and twelve months ended June 30, 2018.

35

(b) Operations and maintenance ("O&M") expenses at our fossil fuel generating plants increased for the three months ended June 30, 2018, compared to the three months ended June 30, 2017, primarily due to maintenance and outage costs related to Newman Power Station ("Newman") Units 2 & 4 and Rio Grande Power Station ("Rio Grande") Unit 8 in 2018. These increases were partially offset by outage costs incurred at Newman Unit 5 in the three months ended June 30, 2017, with no comparable amount in the three months ended June 30, 2018.

O&M expenses at our fossil fuel generating plants increased for the six months ended June 30, 2018, compared to the six months ended June 30, 2017, primarily due to outage costs at Rio Grande Unit 8 in 2018. This increase was partially offset by net reductions in maintenance and outage costs at Newman in the six months ended June 30, 2018, compared to the six months ended June 30, 2017.

(c) Investment and interest income decreased for the three, six and twelve months ended June 30, 2018, compared to the three, six and twelve months ended June 30, 2017, primarily due to a decrease in realized and unrealized net gains on securities held in the NDT. Beginning on January 1, 2018, the Company adopted ASU 2016-01, Financial Instruments, and began recording unrealized gains and losses on equity securities held in the NDT directly in earnings. Refer to "Impact of New Accounting Standard and Use of Non-GAAP Financial Measures" below for further details.

(d) Depreciation and amortization increased for the three and six months ended June 30, 2018, compared to the three and six months ended June 30, 2017, primarily due to increased plant balances.

Depreciation and amortization increased for the twelve months ended June 30, 2018, compared to the twelve months ended June 30, 2017, primarily due to (i) increased plant balances and (ii) approximately $5.0 million of depreciation reduction for the first half of 2016, which was recognized when the 2016 PUCT Final Order was approved in August 2016.

(e) Deregulated Palo Verde Unit 3 revenues decreased for the three and six months ended June 30, 2018, compared to the three and six months ended June 30, 2017, primarily due to decreases in generation of 29.5% and 14.0%, respectively, caused by a spring refueling outage at Unit 3 completed in May 2018, with no comparable outage in the three and six months ended June 30, 2017.

Deregulated Palo Verde Unit 3 revenues decreased for the twelve months ended June 30, 2018, compared to the twelve months ended June 30, 2017, primarily due to a 9.0% decrease in proxy market prices, reflecting a decline in the price of natural gas.

(f) Wheeling revenues decreased for the twelve months ended June 30, 2018, compared to the twelve months ended June 30, 2017, primarily due to the expiration of a contract.

(g) Taxes other than income taxes increased for the twelve months ended June 30, 2018, compared to the twelve months ended June 30, 2017, primarily due to increased property valuations in Texas and New Mexico.

(h) The effective tax rate, other changed for the three months ended June 30, 2018, compared to the three months ended June 30, 2017, primarily due to a decrease in the federal corporate income tax rate from 35% to 21%, excluding the tax impact of other items in the table above.

The effective tax rate, other changed for the six months ended June 30, 2018, compared to the six months ended June 30, 2017, primarily due to (i) a decrease in the federal corporate income tax rate from 35% to 21%, excluding the tax impact of other items in the table above, and (ii) tax benefits from stock incentive plans.

The effective tax rate, other changed for the twelve months ended June 30, 2018, compared to the twelve months ended June 30, 2017, primarily due to (i) a decrease in the federal corporate income tax rate from 35% to 21%, excluding the tax impact of other items in the table above, (ii) state income taxes, and (iii) the allowance for equity funds used during construction ("AEFUDC").

(i) Retail non-fuel base revenues increased for the three months ended June 30, 2018, compared to the three months ended June 30, 2017, primarily due to increased revenues from residential customers of $5.6 million caused by increased kWh sales that resulted from favorable weather and an increase in the average number of residential customers served compared to the three months ended June 30, 2017, and a $4.1 million non-fuel base rate increase approved in the 2017 PUCT Final Order. These increases were partially offset by refunds of approximately $7.7 million to customers for the reduction in the federal corporate income tax rate for the period April 1, 2018 through June 30, 2018.

36

Retail non-fuel base revenues increased for the six months ended June 30, 2018, compared to the six months ended June 30, 2017, primarily due to increased revenues from residential customers of $7.2 million caused by increased kWh sales that resulted from favorable weather and an increase in the average number of residential customers served compared to the six months ended June 30, 2017, and a $6.9 million non-fuel base rate increase approved in the 2017 PUCT Final Order. These increases were partially offset by refunds of approximately $11.8 million to customers for the reduction in the federal corporate income tax rate for the period January 1, 2018 through June 30, 2018.

Retail non-fuel base revenues decreased for the twelve months ended June 30, 2018, compared to the twelve months ended June 30, 2017, primarily due to (i) approximately $17.2 million of retail non-fuel base revenues for the first half of 2016, which were recognized when the 2016 PUCT Final Order was approved in August 2016 and (ii) a refunds of approximately $12.6 million to customers for the reduction in the federal corporate income tax rate for the twelve months ended June 30, 2018. These decreases were partially offset by (i) a $13.8 million non-fuel base rate increase for the period from July 18, 2017 through June 30, 2018 approved in the 2017 PUCT Final Order and (ii) increased revenues from residential customers of $7.9 million caused by increased kWh sales that resulted from an increase in the average number of residential customers.

Impact of New Accounting Standard and Use of Non-GAAP Financial Measures

Upon adoption of ASU 2016-01, Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities, the Company recorded, as of January 1, 2018, a cumulative effect adjustment to retained earnings of $41.0 million, net of tax, for the unrealized gains (losses) related to equity securities held in the NDT. As required by ASU 2016-01, changes in the fair value of equity securities are now recognized in the Company's Statements of Operations. The adoption of the new standard added the potential for significant volatility to the Company's reported results of operations as changes in the fair value of equity securities may occur. Furthermore, the equity investments included in the NDT are significant and are expected to increase significantly during the remaining life (estimated to be 27 to 30 years) of Palo Verde. Accordingly, the Company has provided the following non-GAAP financial measures, which reconcile GAAP net income to non-GAAP adjusted net income and GAAP basic earnings per share to non-GAAP adjusted basic earnings per share, to exclude the impact of changes in fair value of equity securities and realized gains (losses) from the sale of both equity and fixed income securities.

	Three Months Ended
	June 30,
	2018			2017
	(In thousands except for per share data)
Net income (GAAP)	$	33,295		$	36,066
Adjusting items before income tax effects
Unrealized gains, net	(983		)	—
Realized gains, net	(2,119		)	(5,166		)
Total adjustments before income tax effects	(3,102		)	(5,166		)
Income taxes on above adjustments	621			1,033
Adjusting items, net of income taxes	(2,481		)	(4,133		)
Adjusted net income (non-GAAP)	$	30,814		$	31,933
Basic earnings per share (GAAP)	$	0.82		$	0.89
Adjusted basic earnings per share (non-GAAP)	$	0.76		$	0.79

37

	Six Months Ended
	June 30,
	2018			2017
	(In thousands except for per share data)
Net income (GAAP)	$	26,329		$	32,077
Adjusting items before income tax effects
Unrealized losses, net	2,798			—
Realized gains, net	(3,391		)	(7,357		)
Total adjustments before income tax effects	(593		)	(7,357		)
Income taxes on above adjustments	119			1,471
Adjusting items, net of income taxes	(474		)	(5,886		)
Adjusted net income (non-GAAP)	$	25,855		$	26,191
Basic earnings per share (GAAP)	$	0.65		$	0.79
Adjusted basic earnings per share (non-GAAP)	$	0.64		$	0.65

	Twelve Months Ended
	June 30,
	2018			2017
	(In thousands except for per share data)
Net income (GAAP)	$	92,513		$	112,369
Adjusting items before income tax effects
Unrealized losses, net	2,798			—
Realized gains, net	(6,660		)	(11,499		)
Total adjustments before income tax effects	(3,862		)	(11,499		)
Income taxes on above adjustments	773			2,299
Adjusting items, net of income taxes	(3,089		)	(9,200		)
Adjusted net income (non-GAAP)	$	89,424		$	103,169
Basic earnings per share (GAAP)	$	2.28		$	2.77
Adjusted basic earnings per share (non-GAAP)	$	2.20		$	2.55

Adjusted net income and adjusted basic earnings per share are not measures of financial performance under GAAP and should not be considered as an alternative to net income and earnings per share, respectively. Furthermore, the Company's presentation of any non-GAAP financial measure may not be comparable to similarly titled measures used by other companies. The Company believes adjusted net income and adjusted basic earnings per share are useful financial measures for investors and analysts in understanding the Company's core operating performance because each measure removes the effects of variances reported in the Company's results of operations that are not indicative of fundamental changes in the earnings capacity of the Company.

38

Historical Results of Operations

The following discussion includes detailed descriptions of factors affecting individual line items in the results of operations. The amounts presented below are presented on a pre-tax basis.

Operating revenues

We realize revenue from the sale of electricity to retail customers at regulated rates and the sale of energy in the wholesale power market generally at market-based prices. Sales for resale (which are FERC regulated cost-based wholesale sales within our service territory) accounted for less than 1% of revenues.

Revenues from the sale of electricity include fuel costs that are recovered from our customers through fuel adjustment mechanisms. We record deferred fuel revenues for the difference between actual fuel costs and recoverable fuel revenues until such amounts are collected from or refunded to customers. "Non-fuel base revenues" refers to our revenues from the sale of electricity excluding such fuel costs.    

No retail customer accounted for more than 3% of our non-fuel base revenues for the three, six and twelve months ended June 30, 2018. Residential and small commercial customers represent approximately 79% of our non-fuel base revenues for the three, six and twelve months ended June 30, 2018. While this customer base is more stable, it is also more sensitive to changes in weather conditions. The current rate structures in Texas and New Mexico reflect higher base rates during the peak summer season of May through October and lower base rates during November through April for our residential and small commercial and industrial customers. As a result, our business is seasonal, with higher kWh sales and revenues during the summer cooling season.

Weather significantly impacts our residential, small commercial and industrial customers, and to a lesser extent, our sales to public authorities. Heating and cooling degree days can be used to evaluate the effect of weather on energy use. For each degree the average outdoor temperature varies from a standard of 65 degrees Fahrenheit, a degree day is recorded. For the three, six and twelve months ended June 30, 2018, retail non-fuel base revenues were positively impacted by favorable weather when compared to the three, six and twelve months ended June 30, 2017. Cooling degree days for the three, six and twelve months ended June 30, 2018 increased 19.0%, 14.9% and 3.0% when compared to the three, six and twelve months ended June 30, 2017, and were 20.9%, 20.4% and 11.5% above the 10-year average, respectively. The table below shows heating and cooling degree days compared to a 10-year average.

	Three Months Ended			Six Months Ended			Twelve Months Ended
	June 30,			June 30,			June 30,
			10-Year			10-Year			10-Year
	2018	2017	Average	2018	2017	Average	2018	2017	Average*
Heating degree days	11	45	60	976	855	1,173	1,643	1,577	2,081
Cooling degree days	1,319	1,108	1,091	1,356	1,180	1,126	3,093	3,003	2,773

______________

* Calendar year basis.

Customer growth is a key driver of the growth of retail sales. The average number of retail customers grew 1.5% for the three and six months ended June 30, 2018 when compared to the three and six months ended June 30, 2017, and 1.6% for the twelve months ended June 30, 2018 when compared to the twelve months ended June 30, 2017. See the tables presented on pages 41, 42 and 43, which provide detail on the average number of retail customers and the related revenues and kWh sales.

Retail non-fuel base revenues. Retail non-fuel base revenues for the three months ended June 30, 2018 increased $2.2 million, or 1.3%, compared to the three months ended June 30, 2017, primarily due to a $4.1 million non-fuel base rate increase approved in the 2017 PUCT Final Order. Retail non-fuel base revenues decreased by refunds of approximately $7.7 million to customers for the reduction in the federal corporate income tax rate for the period April 1, 2018 through June 30 2018. Excluding the $4.1 million 2017 PUCT Final Order impact and the $7.7 million federal corporate income tax rate refund, retail non-fuel base revenues for the three months ended June 30, 2018, increased by $5.9 million, or 3.5%, compared to the three months ended June 30, 2017. This increase primarily includes a $5.6 million increase in revenues from residential customers caused by an 8.1% increase in kWh sales driven by favorable weather and a 1.5% increase in the average number of residential customers served compared to the three months ended June 30, 2017. The Company set a new kWh sales record in the second quarter of 2018, which was 4.2% higher than the previous record for a second quarter.

Retail non-fuel base revenues for the six months ended June 30, 2018 increased $2.6 million, or 0.9%, compared to the six months ended June 30, 2017, primarily due to a $6.9 million non-fuel base rate increase approved in the 2017 PUCT Final Order. Retail non-fuel base revenues decreased by refunds of approximately $11.8 million to customers for the reduction in the federal corporate income tax rate for the period January 1, 2018 through June 30, 2018. Excluding the $6.9 million 2017 PUCT Final

39

Order impact and the $11.8 million federal corporate income tax rate refund, retail non-fuel base revenues for the six months ended June 30, 2018 increased by $7.5 million, or 2.7%, compared to the six months ended June 30, 2017. This increase primarily includes a $7.2 million increase in revenues from residential customers caused by a 5.8% increase in kWh sales driven by favorable weather and a 1.6% increase in the average number of residential customers served compared to the six months ended June 30, 2017.

For the twelve months ended June 30, 2018, retail non-fuel base revenues decreased $7.9 million, or 1.2%, compared to the twelve months ended June 30, 2017, primarily due to (i) approximately $17.2 million of retail non-fuel base revenues for the period from January 12, 2016 through June 30, 2016, which were recognized when the 2016 PUCT Final Order was approved in August 2016 and (ii) refunds of approximately $12.6 million to customers for the reduction in the federal corporate income tax rate for the twelve months ended June 30, 2018. These decreases were partially offset by (i) a $13.8 million non-fuel base rate increase for the period from July 18, 2017 through June 30, 2018 approved in the 2017 PUCT Final Order and (ii) increased revenues from residential customers of $7.9 million caused by a 2.4% increase in kWh sales that resulted from an increase in the average number of residential customers.

Fuel revenues. Fuel revenues consist of revenues collected from customers under fuel recovery mechanisms approved by the state commissions and the FERC, and deferred fuel revenues which are comprised of the difference between fuel costs and fuel revenues collected from customers. In New Mexico, fuel and purchased power costs are reconciled to actual costs on a monthly basis and recovered or refunded to customers the second succeeding month. In Texas, fuel costs are recovered through a fixed fuel factor. We can seek to revise our fixed fuel factor based upon an approved formula at least four months after our last revision except in the month of December. In addition, if we materially over-recover fuel costs, we must seek to refund the over-recovery, and if we materially under-recover fuel costs, we may seek a surcharge to recover those costs. Fuel over- and under-recoveries are defined as material when they exceed 4% of the previous twelve months' fuel costs.

In the three and six months ended June 30, 2018, we under-recovered our fuel costs by $7.6 million and over-recovered our fuel costs by $0.4 million, respectively. In the twelve months ended June 30, 2018, we over-recovered our fuel costs by $14.8 million. In March 2018 and March 2017, $1.1 million and $1.4 million, respectively, were credited to customers through the applicable fuel adjustment clauses as the result of a reimbursement from the DOE related to spent nuclear fuel storage. At June 30, 2018, we had a net fuel over-recovery balance of $7.2 million, including an over-recovery of $8.2 million in Texas, offset by an under-recovery of $1.0 million in New Mexico. On October 13, 2017, we filed a request to decrease our Texas fixed fuel factor by approximately 19% to reflect decreased fuel expenses primarily related to a decrease in the price of natural gas used to generate power. The decrease in our Texas fixed fuel factor became effective beginning with the November 2017 billing month. On April 13, 2018, we filed a request with the PUCT, which was assigned Docket No. 48264, to decrease the Texas fixed fuel factor by approximately 29% to reflect decreased fuel expenses primarily related to a decrease in the price of natural gas used to generate power. On April 25, 2018, our proposed fuel factors were approved on an interim basis effective for the first billing cycle of the May 2018 billing month. No party to the case requested a hearing by May 14, 2018, and the tariff was approved and the docket closed on May 22, 2018. The Texas fuel factor will continue until changed by the PUCT.

Off-system sales. Off-system sales are wholesale sales into markets outside our service territory. Off-system sales are primarily made in off-peak periods when we have competitive generation capacity available after meeting our regulated service obligations. We have shared 100% of margins on non-arbitrage sales (as defined by the settlement in PUCT Docket No. 41852) and 50% of margins on arbitrage sales with our Texas customers since April 1, 2014. We are currently sharing 90% of off-system sales margins with our New Mexico customers (as reaffirmed in NMPRC Case No. 09-00171-UT), and 25% of our off-system sales margins with our sales for resale customer under the terms of their contract. Palo Verde's availability is an important factor in realizing these off-system sales margins.

Off-system sales revenues decreased $0.6 million, or 5.8%, for the three months ended June 30, 2018 compared to the three months ended June 30, 2017, primarily as a result of lower average market prices for power. Off-system sales revenues increased $8.3 million, or 33.6%, for the six months ended June 30, 2018, when compared to the six months ended June 30, 2017, primarily as a result of a 32.8% increase in kWh sales due to additional available power. Off-system sales revenues increased $17.9 million, or 36.2%, for the twelve months ended June 30, 2018, when compared to the twelve months ended June 30, 2017, primarily as a result of a 26.3% increase in kWh sales due to additional available power, and higher average market prices for power.

40

Comparisons of kWh sales and operating revenues are shown below (in thousands):
					Increase (Decrease)
Three Months Ended June 30:	2018		2017		Amount			Percent
kWh sales:
Retail:
Residential	783,644		724,656		58,988			8.1	%
Commercial and industrial, small	658,463		647,377		11,086			1.7
Commercial and industrial, large	282,508		276,391		6,117			2.2
Sales to public authorities	434,352		423,374		10,978			2.6
Total retail sales	2,158,967		2,071,798		87,169			4.2
Wholesale:
Sales for resale	18,566		21,718		(3,152		)	(14.5	)
Off-system sales	425,787		374,861		50,926			13.6
Total wholesale sales	444,353		396,579		47,774			12.0
Total kWh sales	2,603,320		2,468,377		134,943			5.5
Operating revenues:
Non-fuel base revenues:
Retail:
Residential	$	80,177	$	75,027	$	5,150		6.9	%
Commercial and industrial, small	56,267		57,090		(823		)	(1.4	)
Commercial and industrial, large	8,880		10,443		(1,563		)	(15.0	)
Sales to public authorities	27,016		27,544		(528		)	(1.9	)
Total retail non-fuel base revenues (1)(2)	172,340		170,104		2,236			1.3
Wholesale:
Sales for resale	867		859		8			0.9
Total non-fuel base revenues	173,207		170,963		2,244			1.3
Fuel revenues:
Recovered from customers during the period	37,728		57,148		(19,420		)	(34.0	)
Under collection of fuel	7,584		5,822		1,762			30.3
Total fuel revenues (3)(4)	45,312		62,970		(17,658		)	(28.0	)
Off-system sales (5)	9,722		10,325		(603		)	(5.8	)
Wheeling revenues (6)	4,147		4,548		(401		)	(8.8	)
Energy efficiency cost recovery (7)	1,884		—		1,884			—
Miscellaneous (6)	1,812		2,336		(524		)	(22.4	)
Total revenues from customers	236,084		251,142		(15,058		)	(6.0	)
Other (6)	712		701		11			1.6
Total operating revenues	$	236,796	$	251,843	$	(15,047	)	(6.0	)
Average number of retail customers (8):
Residential	373,372		367,686		5,686			1.5	%
Commercial and industrial, small	42,452		41,860		592			1.4
Commercial and industrial, large	48		48		—			—
Sales to public authorities	5,581		5,622		(41		)	(0.7	)
Total	421,453		415,216		6,237			1.5

________________________________________

(1) 2018 includes a $4.1 million base rate increase related to the 2017 PUCT Final Order received in December 2017.

(2) 2018 includes a $7.7 million base rate decrease related to the reduction in federal statutory income tax rate approved in the TCJA.

(3) 2017 includes $5.0 million related to the Palo Verde performance rewards, net.

(4) Includes deregulated Palo Verde Unit 3 revenues for the New Mexico jurisdiction of $1.6 million and $2.2 million in 2018 and 2017, respectively.

(5) Includes retained margins of $0.4 million in 2018 and 2017.

(6) Represents revenues with no related kWh sales.

(7) The Company implemented ASU 2014-09, Revenue from Contracts with Customers, in the first quarter of 2018, and as required by the standard, revenues related to reimbursed costs of energy efficiency programs approved by the Company's regulators are reported in operating revenues from customers. Related expenses are reported in operations and maintenance expenses.

(8) The number of retail customers presented is based on the number of service locations.

41

Comparisons of kWh sales and operating revenues are shown below (in thousands):
							Increase (Decrease)
Six Months Ended June 30:	2018			2017			Amount			Percent
kWh sales:
Retail:
Residential	1,343,207			1,269,784			73,423			5.8	%
Commercial and industrial, small	1,157,138			1,147,967			9,171			0.8
Commercial and industrial, large	530,793			529,389			1,404			0.3
Sales to public authorities	762,681			758,937			3,744			0.5
Total retail sales	3,793,819			3,706,077			87,742			2.4
Wholesale:
Sales for resale	30,296			32,639			(2,343		)	(7.2	)
Off-system sales	1,290,003			971,623			318,380			32.8
Total wholesale sales	1,320,299			1,004,262			316,037			31.5
Total kWh sales	5,114,118			4,710,339			403,779			8.6
Operating revenues:
Non-fuel base revenues:
Retail:
Residential	$	133,469		$	126,337		$	7,132		5.6	%
Commercial and industrial, small	89,564			90,875			(1,311		)	(1.4	)
Commercial and industrial, large	16,006			18,343			(2,337		)	(12.7	)
Sales to public authorities	44,172			45,094			(922		)	(2.0	)
Total retail non-fuel base revenues (1)(2)	283,211			280,649			2,562			0.9
Wholesale:
Sales for resale	1,343			1,322			21			1.6
Total non-fuel base revenues	284,554			281,971			2,583			0.9
Fuel revenues:
Recovered from customers during the period	77,672			104,768			(27,096		)	(25.9	)
Over collection of fuel (3)	(366		)	(2,708		)	2,342			86.5
Total fuel revenues (4)(5)	77,306			102,060			(24,754		)	(24.3	)
Off-system sales (6)	32,777			24,525			8,252			33.6
Wheeling revenues (7)	8,433			8,815			(382		)	(4.3	)
Energy efficiency cost recovery (8)	3,800			—			3,800			—
Miscellaneous (7)	4,271			4,188			83			2.0
Total revenues from customers	411,141			421,559			(10,418		)	(2.5	)
Other (7)	1,368			1,619			(251		)	(15.5	)
Total operating revenues	$	412,509		$	423,178		$	(10,669	)	(2.5	)
Average number of retail customers (9):
Residential	372,361			366,497			5,864			1.6	%
Commercial and industrial, small	42,328			41,968			360			0.9	%
Commercial and industrial, large	48			49			(1		)	(2.0	)%
Sales to public authorities	5,587			5,528			59			1.1	%
Total	420,324			414,042			6,282			1.5	%

________________________________________

(1) 2018 includes a $6.9 million base rate increase related to the 2017 PUCT Final Order received in December 2017.

(2) 2018 includes an $11.8 million base rate decrease related to the reduction in federal statutory income tax rate approved in the TCJA.

(3) Includes the portion of DOE refunds related to spent fuel storage of $1.1 million and $1.4 million in 2018 and 2017, respectively, that were credited to customers through the applicable fuel adjustment clauses.

(4) 2017 includes $5.0 million related to the Palo Verde performance rewards, net.

(5) Includes deregulated Palo Verde Unit 3 revenues for the New Mexico jurisdiction of $4.0 million and $5.0 million in 2018 and 2017, respectively.

(6) Includes retained margins of $1.0 million and $0.9 million in 2018 and 2017, respectively.

(7) Represents revenues with no related kWh sales.

(8) The Company implemented ASU 2014-09, Revenue from Contracts with Customers, in the first quarter of 2018, and as required by the standard, revenues related to reimbursed costs of energy efficiency programs approved by the Company's regulators are reported in operating revenues from customers. Related expenses are reported in operations and maintenance expenses.

(9) The number of retail customers presented is based on the number of service locations.

42

Comparisons of kWh sales and operating revenues are shown below (in thousands):
						Increase (Decrease)
Twelve Months Ended June 30:	2018			2017		Amount			Percent
kWh sales:
Retail:
Residential	2,896,683			2,827,453		69,230			2.4	%
Commercial and industrial, small	2,419,881			2,417,474		2,407			0.1
Commercial and industrial, large	1,046,723			1,044,300		2,423			0.2
Sales to public authorities	1,568,414			1,579,935		(11,521		)	(0.7	)
Total retail sales	7,931,701			7,869,162		62,539			0.8
Wholesale:
Sales for resale	60,544			62,216		(1,672		)	(2.7	)
Off-system sales	2,361,264			1,869,657		491,607			26.3
Total wholesale sales	2,421,808			1,931,873		489,935			25.4
Total kWh sales	10,353,509			9,801,035		552,474			5.6
Operating revenues:
Non-fuel base revenues:
Retail:
Residential	$	295,016		$	294,689	$	327		0.1	%
Commercial and industrial, small	197,488			198,970		(1,482		)	(0.7	)
Commercial and industrial, large	36,066			39,831		(3,765		)	(9.5	)
Sales to public authorities	96,968			99,903		(2,935		)	(2.9	)
Total retail non-fuel base revenues (1)(2)	625,538			633,393		(7,855		)	(1.2	)
Wholesale:
Sales for resale	2,751			2,534		217			8.6
Total non-fuel base revenues	628,289			635,927		(7,638		)	(1.2	)
Fuel revenues:
Recovered from customers during the period	191,284			204,863		(13,579		)	(6.6	)
(Over) under collection of fuel (3)	(14,791		)	10,192		(24,983		)	—
Total fuel revenues (4)(5)	176,493			215,055		(38,562		)	(17.9	)
Off-system sales (6)	67,238			49,357		17,881			36.2
Wheeling revenues (7)	17,732			21,256		(3,524		)	(16.6	)
Energy efficiency cost recovery (8)	3,800			—		3,800			—
Miscellaneous (7)	8,312			8,860		(548		)	(6.2	)
Total revenue from customers	901,864			930,455		(28,591		)	(3.1	)
Other (7)(9)	4,264			3,985		279			7.0
Total operating revenues	$	906,128		$	934,440	$	(28,312	)	(3.0	)
Average number of retail customers (10):
Residential	370,975			364,922		6,053			1.7	%
Commercial and industrial, small	42,158			41,656		502			1.2
Commercial and industrial, large	48			49		(1		)	(2.0	)
Sales to public authorities	5,561			5,405		156			2.9
Total	418,742			412,032		6,710			1.6

________________________________________

(1) Includes base rate increases of $13.8 million and $17.2 million in 2018 and 2017, respectively.

(2) 2018 includes a $12.6 million base rate decrease related to the reduction in federal statutory income tax rate approved in the TCJA of 2017.

(3) Includes the portion of DOE refunds related to spent fuel storage of $1.1 million and $1.4 million in 2018 and 2017, respectively, that was credited to customers through the applicable fuel adjustment clauses.

(4) 2017 includes $5.0 million related to the Palo Verde performance rewards, net.

(5) Includes deregulated Palo Verde Unit 3 revenues for the New Mexico jurisdiction of $8.8 million and $9.7 million in 2018 and 2017, respectively.

(6) Includes retained margins of $1.8 million and $1.4 million for 2018 and 2017, respectively.

(7) Represents revenues with no related kWh sales.

(8) The Company implemented ASU 2014-09, Revenue from Contracts with Customers, in the first quarter of 2018, and as required by the standard, revenues related to reimbursed costs of energy efficiency programs approved by the Company's regulators are reported in operating revenues from customers. Related expenses are reported in operations and maintenance expenses.

(9) Includes energy efficiency bonuses of $1.2 million and $0.8 million in 2018 and 2017, respectively.

(10) The number of retail customers presented is based on the number of service locations.

43

Fuel and purchased power expense

Our sources of energy include electricity generated from our nuclear and natural gas generating plants and purchased power. Palo Verde represents approximately 30% of our net dependable generating capacity and approximately 48%, 53% and 53% of our Company-generated energy for the three, six and twelve months endedJune 30, 2018, respectively. Fluctuations in the price of natural gas, which also is the primary factor influencing the price of purchased power, have had a significant impact on our cost of energy.

Fuel and purchased power expense decreased $12.4 million, or 18.9%, for the three months ended June 30, 2018 compared to the three months ended June 30, 2017, primarily due to (i) decreased natural gas costs of $8.7 million due to a 34.9% decrease in the average cost of Megawatt-hours ("MWhs") generated, partially offset by an 19.0% increase in MWhs generated with natural gas, (ii) decreased total purchased power costs of $3.0 million due to an 18.3% decrease in the MWhs purchased, and (iii) decreased nuclear costs of $0.8 million primarily due to a reduction in the price of uranium.

	Three Months Ended June 30,
	2018					2017
Fuel Type	Cost		MWh	Cost per MWh		Cost		MWh	Cost per MWh
	(in thousands)					(in thousands)
Natural gas	$	29,904	1,256,393	$	23.80	$	38,602	1,055,911	$	36.56
Coal (a)	165		—	—		37		—	—
Nuclear	9,692		1,139,871	8.50		10,534		1,151,530	9.15
Total	39,761		2,396,264	16.59		49,173		2,207,441	22.28
Purchased power:
Photovoltaic	7,198		89,241	80.66		7,479		91,921	81.36
Other	6,504		237,564	27.38		9,242		307,904	30.02
Total purchased power	13,702		326,805	41.93		16,721		399,825	41.82
Total fuel and purchased power	$	53,463	2,723,069	19.63		$	65,894	2,607,266	25.27

___________________

(a) Costs related to amortization of deferred coal mine reclamation obligations.

Fuel and purchased power expense decreased $10.5 million, or 9.1%, for the six months ended June 30, 2018 compared to the six months ended June 30, 2017, primarily due to (i) decreased total purchased power costs of $5.6 million due to a 25.5% decrease in the MWhs purchased partially offset by a 9.7% increase in the average cost of MWhs purchased, (ii) decreased natural gas costs of $3.7 million due to a 31.5% decrease in the average cost of MWhs generated, partially offset by a 37.8% increase in MWhs generated with natural gas, and (iii) decreased nuclear costs of $1.4 million primarily due to a reduction in the price of uranium.

	Six Months Ended June 30,
	2018					2017
Fuel Type	Cost		MWh	Cost per MWh		Cost		MWh		Cost per MWh
	(in thousands)					(in thousands)
Natural gas	$	61,049	2,241,500	$	27.24	$	64,708	1,626,736		$	39.78
Coal (a)	330		—	—		245		—		—
Nuclear (b)	19,436		2,486,378	8.29		20,826		2,515,057		8.90
Total	80,815		4,727,878	17.34		85,779		4,141,793		21.09
Purchased power:
Photovoltaic	12,222		150,811	81.04		12,778		156,656		81.57
Other	12,614		465,808	27.08		17,616		671,279		26.24
Total purchased power	24,836		616,619	40.28		30,394		827,935		36.71
Total fuel and purchased power	$	105,651	5,344,497	19.99		$	116,173	$	4,969,728	23.69

____________________

(a) Costs related to amortization of deferred coal mine reclamation obligations.

(b) Costs include a DOE refund related to spent fuel storage of $1.2 million and $1.6 million recorded in March 2018 and 2017, respectively.

Cost per MWh excludes these refunds.

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Fuel and purchased power expense decreased $14.7 million, or 5.9%, for the twelve months ended June 30, 2018 compared to the twelve months ended June 30, 2017, primarily due to (i) decreased total purchased power costs of $12.7 million due to a 25.3% decrease in the MWhs purchased partially offset by an 8.3% increase in the average cost of MWhs purchased, and (ii) decreased nuclear costs of $2.3 million primarily due to a 6.3% decrease in the average cost of MWhs generated with nuclear fuel partially offset by a $0.4 million reduction in the 2018 DOE refund compared to 2017. These decreases in energy expenses were partially offset by increased natural gas costs of $0.6 million primarily due to a 27.0% increase in the MWhs generated with natural gas, partially offset by a 21.0% decrease in the average cost of MWhs generated.

	Twelve Months Ended June 30,
	2018					2017
Fuel Type	Cost		MWh	Cost per MWh		Cost		MWh	Cost per MWh
	(in thousands)					(in thousands)
Natural gas	$	138,568	4,456,314	$	31.09	$	137,991	3,507,771	$	39.34
Coal (a)	660		—	—		871		12,109	71.93
Nuclear (b)	40,877		5,080,646	8.28		43,193		5,062,945	8.84
Total	180,105		9,536,960	19.01		182,055		8,582,825	21.39
Purchased power:
Photovoltaic	23,228		286,312	81.13		23,496		289,927	81.04
Other	30,896		1,043,213	29.62		43,369		1,489,244	29.12
Total purchased power	54,124		1,329,525	40.71		66,865		1,779,171	37.58
Total fuel and purchased power	$	234,229	10,866,485	21.66		$	248,920	10,361,996	24.17

_____________

(a) The sale of our interest in Four Corners, coal-fired generation station, closed on July 6, 2016. The costs include amortization of deferred

coal mine reclamation obligations.

(b) Costs include a DOE refund related to spent fuel storage of $1.2 million and $1.6 million recorded in March 2018 and 2017, respectively.

Cost per MWh excludes these refunds.

Operations and maintenance expense

Operations and maintenance expense increased $6.6 million, or 8.0%, for the three months ended June 30, 2018 compared to the three months ended June 30, 2017, primarily due to increases of (i) $4.6 million in maintenance and outage costs related to Newman Units 2 and 4 and Rio Grande Unit 8, and (ii) $1.9 million related to energy efficiency program costs previously offset by the related revenues prior to the adoption of ASU 2014-09. These increases were partially offset by a $1.4 million decrease in outage costs incurred at Newman Unit 5 during the three months ended June 30, 2017.

Operations and maintenance expense increased $7.6 million, or 4.7%, for the six months ended June 30, 2018 compared to the six months ended June 30, 2017, primarily due to increases of (i) $4.1 million in outage costs at Rio Grande Unit 8, (ii) $3.8 million related to energy efficiency program costs previously offset by the related revenues prior to the adoption of ASU 2014-09, and (iii) $1.9 million in Four Corners operating expenses due to an adjustment in estimated pension and benefit costs and post-closing purchase price adjustments recorded in the six months ended June 30, 2017. These increases were partially offset by a $3.3 million net reduction in maintenance and outage costs at Newman during the six months ended June 30, 2017.

Operations and maintenance expense increased $6.8 million, or 2.1%, for the twelve months ended June 30, 2018 compared to the twelve months ended June 30, 2017, primarily due to increases of (i) $3.8 million related to energy efficiency program costs previously offset by the related revenues prior to the adoption of ASU 2014-09, (ii) $3.7 million in outage costs at Rio Grande Unit 8, and (iii) $0.9 million in Four Corners operating expenses due to a post-closing purchase price adjustment recorded in the twelve months ended June 30, 2017. These increases were partially offset by a $3.1 million net reduction in maintenance and outage costs at Newman during the twelve months ended June 30, 2017.

Depreciation and amortization expense

Depreciation and amortization expense increased $1.5 million, or 6.5%, and $3.3 million, or 7.5% for the three and six months ended June 30, 2018 compared to the three and six months ended June 30, 2017, primarily due to increased plant balances.

Depreciation and amortization expense increased $12.6 million, or 15.4%, for the twelve months ended June 30, 2018 compared to the twelve months ended June 30, 2017, primarily due to (i) increased plant balances and (ii) approximately $5.0

45

million of depreciation reduction for the first half of 2016, which was recognized when the 2016 PUCT Final Order was approved in August 2016.

Taxes other than income taxes

Taxes other than income taxes remained relatively unchanged for the three and six months ended June 30, 2018 compared to the three and six months ended June 30, 2017. Taxes other than income taxes increased $2.4 million, or 3.5%, for the twelve months ended June 30, 2018 compared to the twelve months ended June 30, 2017, primarily due to increased property valuations in Texas and New Mexico.

Other income (deductions)

Other income (deductions) decreased $0.9 million, or 7.0%, for the three months ended June 30, 2018 compared to the three months ended June 30, 2017, primarily due to a $1.9 million decrease in realized and unrealized net gains on securities held in the NDT, partially offset by a $0.7 million increase in the expected return on benefit plan assets.

Other income (deductions) decreased $4.6 million, or 19.8%, for the six months ended June 30, 2018 compared to the six months ended June 30, 2017, primarily due to a $6.5 million decrease in realized and unrealized net gains on securities held in the NDT, partially offset by a $1.3 million increase in the expected return on benefit plan assets.

Other income (deductions) decreased $5.6 million, or 12.9%, for the twelve months ended June 30, 2018 compared to the twelve months ended June 30, 2017, primarily due to (i) a $7.2 million decrease in realized and unrealized net gains on securities held in the NDT, and (ii) a $ 1.0 million decrease in the AEFUDC resulting from lower average balances of construction work in progress ("CWIP") and a reduction in the AEFUDC rate. These decreases were partially offset by a $1.5 million increase in the expected return on benefit plan assets.

See Note A, Principles of Preparation - New Accounting Standards Adopted, for additional information.

Interest charges (credits)

Interest charges (credits) remained relatively unchanged for the three and six months ended June 30, 2018 compared to the three and six months ended June 30, 2017. Interest charges (credits) increased by $0.8 million, or 1.0%, for the twelve months ended June 30, 2018 compared to the twelve months ended June 30, 2017, primarily due to (i) an increase in short-term borrowings for working capital purposes and (ii) decreased allowance for borrowed funds used during construction ("ABFUDC") as a result of lower average balances of CWIP and a reduction in the ABFUDC rate. These increases were partially offset by a decrease due to the retirement at maturity of the $50.0 million Series B 4.47% Senior Notes during the third quarter of 2017.

Income tax expense

Income tax expense decreased $9.0 million, or 45.6%, and $9.8 million, or 55.9%, for the three and six months ended June 30, 2018, respectively. The decreases compared to the three and six months ended June 30, 2017, are primarily due to decreases in pre-tax income and a decrease in the federal income tax rate.

Income tax expense decreased $21.9 million, or 34.7%, for the twelve months ended June 30, 2018 compared to the twelve months ended June 30, 2017, primarily due to (i) a decrease in pre-tax income, (ii) a decrease in the federal income tax rate, and (iii) a decrease in state income taxes.

New Accounting Standards

See Notes to Financial Statements Note A for a discussion of new accounting standards.

Inflation

For the last several years, inflation has been relatively low and, therefore, has had minimal impact on our results of operations and financial condition.

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Liquidity and Capital Resources

We continue to maintain a strong capital structure in which common stock equity represented 43.7% of our capitalization (common stock equity, long-term debt, current maturities of long-term debt and short-term borrowings under the RCF) as of June 30, 2018. At June 30, 2018, we had a balance of $11.9 million in cash and cash equivalents. Based on current projections, we believe that we will have adequate liquidity through our current cash balances, cash from operations and available borrowings under the RCF to meet all of our anticipated cash requirements for the next twelve months.

Our principal liquidity requirements in the near-term are expected to consist of capital expenditures to expand and support electric service obligations, expenditures for nuclear fuel inventory, interest payments on our indebtedness, cash dividend payments, operating expenses including fuel costs, maintenance costs, cyber-security, security, compliance initiatives and taxes.

Capital Requirements. During the six months ended June 30, 2018, our primary capital requirements were for the construction and purchase of electric utility plant, payment of common stock dividends and purchases of nuclear fuel. Capital expenditures for new electric utility plant were $117.3 million in the six months ended June 30, 2018 compared to $108.1 million in the six months ended June 30, 2017. Capital expenditures for 2018 are expected to be approximately $236 million. Capital requirements for purchases of nuclear fuel were $18.9 million in the six months ended June 30, 2018 compared to $20.6 million in the six months ended June 30, 2017.

On June 29, 2018, we paid a quarterly cash dividend of $0.36 per share, or $14.6 million, to shareholders of record as of the close of business on June 15, 2018. We paid a total of $28.3 million in cash dividends during the six months ended June 30, 2018. At the current dividend rate, we expect to pay cash dividends of approximately $57.6 million during 2018. In addition, while we do not currently anticipate repurchasing shares of our common stock in 2018, we may repurchase shares of our common stock in the future. Under our repurchase program, purchases can be made at open market prices or in private transactions, and repurchased shares are available for issuance under employee benefit and stock incentive plans, or may be retired. No shares of common stock were repurchased during the six months ended June 30, 2018. As of June 30, 2018, a total of 393,816 shares remain eligible for repurchase under the repurchase program.

We expect to continue to maintain a prudent level of liquidity and monitor market conditions for debt and equity securities. Our liquidity needs can fluctuate quickly based on fuel prices and other factors and we are continuing to make investments in new electric plant and other assets in order to reliably serve our customers.

Our cash requirements for federal and state income taxes vary from year to year based on taxable income, which is influenced by the timing of revenues and expenses recognized for income tax purposes. The following summary describes the major impacts of the TCJA on our liquidity. We continue to evaluate the TCJA and have made assumptions based on information currently available.

The TCJA discontinued bonus depreciation for regulated utilities which reduced tax deductions previously available to us for 2017, 2018 and 2019. The decrease in tax deductions will result in the utilization of our net operating loss carryforwards ("NOL carryforwards") approximately two years earlier than previously anticipated and is expected to result in higher income tax payments beginning in 2019, after the full utilization of NOL carryforwards. However, due to the lower federal corporate income tax rate enacted by the TCJA, our future federal corporate income tax payments will be made at the reduced rate of 21% beginning in 2018. Due to NOL carryforwards, minimal tax payments are expected for 2018, which are mostly related to state income taxes.

The effect of the TCJA on our rates will be beneficial to our customers. Following the enactment of the TCJA and the reduction of the federal corporate income tax rate, revenues collected from our customers in 2018 are reduced in an amount that approximates the savings in tax expense. This reduction in revenues is expected to negatively impact our cash flows by approximately $26 million to $31 million during 2018.

We continually evaluate our funding requirements related to our retirement plans, other post-retirement benefit plans and the NDT. During the six months ended June 30, 2018, we contributed $5.8 million and $0.2 million to our retirement plans and other post-retirement benefits plan, respectively, and $1.1 million to the NDT. We are in compliance with the funding requirements of the federal government for our benefit plans. In addition, with respect to our nuclear plant decommissioning trust, we are in compliance with the funding requirements of the federal law and the ANPP Participation Agreement. We will continue to review our funding for these plans in order to meet our future obligations.

Capital Resources. Cash provided by operations, $74.4 million for the six months ended June 30, 2018 and $68.0 million for the six months ended June 30, 2017, is a significant source for funding capital requirements. A component of cash flows from operations is the change in net over-collection and under-collection of fuel revenues. The difference between fuel revenues collected and fuel expense incurred is deferred to be either refunded (over-recoveries) or surcharged (under-recoveries) to customers in the future. During the six months ended June 30, 2018, we had fuel over-recoveries of $1.0 million compared to over-recoveries of

47

fuel costs of $2.7 million during the six months ended June 30, 2017. At June 30, 2018, we had a net fuel over-recovery balance of $7.2 million, including an over-recovery of $8.2 million in Texas and an under-recovery of $1.0 million in New Mexico. On April 13, 2018, we filed a request with the PUCT to decrease our Texas fixed fuel factor by approximately 29% to reflect decreased fuel expenses primarily related to a decrease in the price of natural gas used to generate power. On April 25, 2018, the Company's proposed fuel factors were approved on an interim basis effective for the first billing cycle of the May 2018 billing month. The revised factor was approved by the PUCT and the docket closed on May 22, 2018. The Texas fixed fuel factor will continue thereafter until changed by the PUCT.

We maintain the RCF for working capital and general corporate purposes and financing of nuclear fuel through the RGRT. The RGRT, the trust through which we finance our portion of nuclear fuel for Palo Verde, is consolidated in our financial statements. The RCF has a term ending on January 14, 2020. The maximum aggregate unsecured borrowing currently available under the RCF is $350.0 million. We may increase the RCF by up to $50.0 million (to a total of $400.0 million) during the term of the RCF, upon the satisfaction of certain conditions more fully set forth in the agreement, including obtaining commitments from lenders or third party financial institutions. We also have the option to extend the term of the RCF by one additional year to January 14, 2021, in accordance with the terms of the agreement. The total amount borrowed for nuclear fuel by the RGRT, excluding debt issuance costs, was $134.4 million at June 30, 2018, of which $24.4 million had been borrowed under the RCF, and $110.0 million was borrowed through the issuance of senior notes. Borrowings by the RGRT for nuclear fuel, excluding debt issuance costs, were $133.9 million as of June 30, 2017, of which $38.9 million had been borrowed under the RCF and $95.0 million was borrowed through the issuance of senior notes. Interest costs on borrowings to finance nuclear fuel are accumulated by the RGRT and charged to us as fuel is consumed and recovered through fuel recovery charges. At June 30, 2018, $56.0 million was outstanding under the RCF for working capital and general corporate purposes, which may include funding capital expenditures. At June 30, 2017, $140.0 million was outstanding under the RCF for working capital and general corporate purposes. Total aggregate borrowings under the RCF at June 30, 2018 were $80.4 million with an additional $269.5 million available to borrow.

We received approval from the NMPRC on October 7, 2015, to guarantee the issuance of up to $65.0 million of long-term debt by the RGRT to finance future purchases of nuclear fuel and to refinance existing nuclear fuel debt obligations. We received additional approval from the NMPRC on October 4, 2017 to amend and extend the RCF, issue up to $350.0 million in long-term debt and to redeem and refinance the $63.5 million 2009 Series A 7.25% Pollution Control Bonds and the $37.1 million 2009 Series B 7.25% Pollution Control Bonds, which are subject to optional redemption in 2019. The NMPRC approval to issue up to $350.0 million in long-term debt supersedes its prior approval. We requested similar approval from the FERC on September 1, 2017 and received approval on October 31, 2017. The FERC approval also included permission to guarantee the issuance of up to $65.0 million of long-term debt by the RGRT and to continue to utilize our existing RCF with the ability to amend and extend the RCF at a future date. The authorization approved by the FERC is effective from November 15, 2017 through November 14, 2019 and supersedes its prior approvals. Under these authorizations, on June 28, 2018, the Company issued $125 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028 and guaranteed the issuance by the RGRT of $65 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025. The net proceeds from the sale of these senior notes were used to repay outstanding short-term borrowings under the RCF.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources.

48

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market risk due to changes in interest rates, equity prices and commodity prices. See the 2017 Form 10-K, Item 7A, "Quantitative and Qualitative Disclosures About Market Risk," for a complete discussion of the market risks we face and our market risk sensitive assets and liabilities. As of June 30, 2018, there have been no material changes in the market risks we face or the fair values of assets and liabilities disclosed in Item 7A, "Quantitative and Qualitative Disclosures About Market Risk," in the 2017 Form 10-K.

Item 4. Controls and Procedures

Evaluation of disclosure controls and procedures. Under the supervision and with the participation of our management, including our chief executive officer and our chief financial officer, we conducted an evaluation pursuant to Rule 13a-15(b) under the Exchange Act of our disclosure controls and procedures as defined in Rule 13a-15(e) under the Exchange Act. Based on that evaluation, our chief executive officer and our chief financial officer concluded that, as of June 30, 2018, our disclosure controls and procedures are effective.

Changes in internal control over financial reporting. There were no changes in our internal control over financial reporting in connection with the evaluation required by paragraph (d) of the Exchange Act Rules 13a-15 or 15d-15, that occurred during the quarter ended June 30, 2018, that materially affected, or that were reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

We hereby incorporate by reference the information set forth in Part I of this report under Notes D and I of the Notes to Financial Statements.

Item 1A. Risk Factors

Our 2017 Form 10-K and our Quarterly Report on Form 10-Q for the quarter ended March 30, 2018 include a detailed discussion of our risk factors.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(c) Issuer Purchases of Equity Securities.

Period	Total Number of Shares Purchased	Average Price Paid per Share (Including Commissions)		Total Number of Shares Purchased as Part of a Publicly Announced Program	Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs
April 1 to April 30, 2018	—	$	—	—	393,816
May 1 to May 31, 2018	—	—		—	393,816
June 1 to June 30, 2018	—	—		—	393,816

Item 5. Other Information

Investors should note that we announce material financial information in SEC filings, press releases and public conference calls. Based on new guidance from the SEC, we may also use the Investor Relations section of our website (www.epelectric.com) to communicate with investors about our company. It is possible that the financial and other information we post there could be deemed to be material information. The information on our website is not part of this document.

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Item 6. Exhibits

Exhibit Number	Exhibit
10.01*	Form of Restricted Stock Award Agreement (for non-employee directors) between the Company and certain directors of the Company. (Identical in all material respects to Exhibit 10.5 to the Company's Current Report on Form 8-K, filed on February 5, 2018).
10.02	Amendment dated June 29, 2018, to the Franchise Agreement between the Company and the City of El Paso, dated July 12, 2005.
10.03*	Note Purchase Agreement, dated as of June 28, 2018, between El Paso Electric Company, Rio Grande Resources Trust II and the purchasers named therein. (Exhibit 10.1 to the Company's Current Report Form 8-K, filed on June 29, 2018).
10.04*	Note Purchase Agreement, dated as of June 28, 2018, between El Paso Electric Company and the purchasers named therein. (Exhibit 10.2 to the Company's Current Report Form 8-K, filed on June 29, 2018).
15	Letter re Unaudited Interim Financial Information
31.01	Certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.01	Certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Linkbase Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
*	Previously filed as indicated.

51

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	EL PASO ELECTRIC COMPANY
By:	/s/ NATHAN T. HIRSCHI
	Nathan T. Hirschi
	Senior Vice President - Chief Financial Officer
	(Duly Authorized Officer and Principal Financial Officer)

Dated: August 3, 2018

52

EX-10.02

Exhibit 10.02

ORDINANCE NO. 018772

AN ORDINANCE AMENDING ORDINANCE NO. 16090, WHICH GRANTED A FRANCHISE TO EL PASO ELECTRIC COMPANY, (AS AMENDED BY ORDINANCE NO. 17460, WHICH INCREASED THE STREET RENTAL CHARGE) TO INCREASE STREET RENTAL CHARGE.

WHEREAS, the City Council of the City of El Paso, Texas, (“City”) granted to El Paso Electric Company (“Company”) a franchise to operate the electric utility for transmission and distribution of electrical energy within the boundaries of the City on July 12, 2005, by Ordinance No. 16090;

WHEREAS, the City and Company amended Ordinance No. 16090 to increase the street rental charge on November 16, 2010; and

WHEREAS, the City wishes to increase the Street Rental Charge paid by the Company to the City.

NOW, THEREFORE BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF EL PASO, TEXAS, THAT:

Section 1.

Section 1, Grant, of An Ordinance Granting a Franchise to El Paso Electric Company and Waiving Application Procedures, adopted as Ordinance No. 16090, as amended by An Ordinance Amending Ordinance No. 16090, which Granted a Franchise to El Paso Electric Company, to Increase Street Rental Charge, adopted as Ordinance No. 17460 (“Franchise Ordinance”), is hereby amended to read as follows:

Section 1. Grant.  There is hereby granted by the City of El Paso, Texas (the “City”) to El Paso Electric Company, a Texas corporation (the “Company”), its successors and assigns, for the term commencing August 2, 2005 and extending through July 31, 2060 (the “Franchise Term”), a franchise to construct, reconstruct, repair, maintain, use and operate in, over, or under the present and future streets, alleys, public ways, parks, and public places of the City of El Paso, facilities for the generation, transmission and distribution of electrical energy and broadband over power line communications services (“BPL”) for the use of the City and the inhabitants thereof and properties therein, with all usual and customary appurtenances for such generation, transmission and distribution (this “Franchise”). Provided, this Franchise does not include places where the City’s authority to permit such installations is or hereafter may be withdrawn by the State, or where the Texas Department of Transportation or other State agency constructs or maintains such public facility or place and lawfully excludes the authority of the City to permit such public utility and BPL installations therein.

1

Section 2.

Subsection (b) of Section 13, Compensation, of the Franchise Ordinance, is hereby amended to read as follows:

(b) The City will increase the Street Rental Charge to be paid by the Company to the City on a quarterly basis during the remaining life of this Franchise by an additional three quarters of one percent (0.75%) effective 2010 (“Additional Fee”) and a supplemental one percent (1.0%) (“Auxiliary Fee”) for a total amount of (i) five percent (5.0%) of the gross revenues the Company receives for the generation, transmission, and distribution of electrical energy and other services within the City and (ii) five and three quarters percent (5.75%) of BPL-related gross revenues within the City of El Paso, except however for any revenues from municipal accounts to the extent that any such revenues are excepted from the Company’s Rate Schedule 94, Supplemental Franchise Fee Rider. A portion of the Street Rental Charge equal to one and three quarters of one percent (1.75%) of the gross revenues the Company receives for the generation, transmission, and distribution of electrical energy and other services, including BPL services, within the City shall be allocated by the City for promotion of economic development, including economic development incentives for new commercial customers with high electric energy needs, the attraction of companies that will make significant investments of capital and human resources in the community, solar or other renewable energy rebates or incentives, or to increase the City’s capacity in alternative energy research, development, manufacturing and generation, and for such other economic development public purposes including infrastructure as reasonably determined by the City. The portion of the Street Rental Charge allocated to economic development shall be placed in a restricted fund to be used solely for the economic development purposes described herein and cannot be commingled with existing Street Rental Charges to support or supplement general fund operations. The City will provide an annual update on the status, uses, and economic impact of the Additional Fee and the Auxiliary Fee to the City Council and the public.

The Company shall pay the Street Rental Charge to the City by electronic funds transfer or by other means of immediately available funds within forty-five (45) days of the end of each calendar quarter (the “Payment Date”). If the Street Rental Charge or any portion thereof is not paid on or before the Payment Date, the unpaid balance shall bear interest at a daily rate equivalent to the prime rate of interest as published by the Wall Street Journal for that date, plus one percent (1%) per annum from the Payment Date until the date such payment is made. If any payment shall be more than thirty (30) days late, the interest shall be paid at such prime rate plus three percent (3%) per annum.

2

Section 2. This ordinance shall take effect on the later of (i) May 1, 2018; and (ii) the first day of the first calendar quarter that occurs thirty (30) days following the later of (a) the date the City adopts this ordinance and the ordinance is accepted in writing by the Company; and (b) the date the tariff, in substantially the same form as appended to this ordinance as Attachment A and filed with the City, becomes final and non-appealable.

Section 3. Except as expressly amended herein, the Franchise Ordinance shall continue in full force and effect.

ADOPTED this 20th day of March, 2018.

	CITY OF EL PASO:
	/s/ DEE MARGO
	Dee Margo, Mayor
[SEAL]
ATTEST:
/s/ LAURA D. PRINE
Laura D. Prine
City Clerk
APROVED AS TO FORM:	APPROVED AS TO CONTENT:
/s/ SYLVIA BORUNDA FIRTH	/s/ [ILLEGIBLE]
Sylvia Borunda Firth	Tomás González
City Attorney	City Manager

3

ACCEPTANCE

The Amendment of the Franchise granted by the City of El Paso on March 20th, 2018, is hereby accepted this 29th day of June, 2018.

EL PASO ELECTRIC COMPANY

By:	/s/ MARY E. KIPP
	Mary E. Kipp
	President and Chief Executive Officer

STATE OF TEXAS	§
COUNTY OF EL PASO	§

This instrument was acknowledged before me this 29th day of June, 2018, by Mary E. Kipp, President and Chief Executive Officer of El Paso Electric Company, a Texas corporation, on behalf of said corporation.

	/s/ HILDA VARGAS
[SEAL]	Notary Public in and for the
	State of Texas

Received for filing this 29 day of June, 2018.

[SEAL]

/s/ LAURA D. PRINE

Laura D. Prine

City Clerk

4

ATTACHMENT A
EL PASO ELECTRIC COMPANY	N
SCHEDULE NO. 94	N
SUPPLEMENTAL FRANCHISE FEE RIDER	N

APPLICABILITY Electric service and fees billed under the Company’s rate schedules within the city of El Paso municipal limits and subject to a Franchise Fee charged by the City of El Paso, where the currently Applicable Franchise Fee is greater than the Legacy Franchise Fee, as approved and in effect at the time of the Company’s most recent base rate change, shall be subject to the Supplemental Franchise Fee Rider.	N
TERRITORY Municipal city limits of El Paso, Texas
MONTHLY RATE ADJUSTMENT The Supplemental Franchise Fee is billed as a percentage of the total monthly electric service bill, before sales and other use taxes, with the percentage calculated as the currently Applicable Franchise Fee Rate less the Legacy Franchise Fee Rate, using the formula: SFF = (AFR + GUF) - LFR, where: SFF = Supplemental Franchise Fee (%) AFR = Applicable Franchise Fee Rate (%) GUF = Gross Up Factor (%) LFR = Legacy Franchise Fee Rate (%) The AFR is being amended pursuant to agreement with the City of El Paso to 5.00% and to 5.75% for broadband over powerline (BPL) services. The LFR currently approved and in effect at the time of the Company’s most recent general rate proceeding and at the time of this original tariff is 4.00% and 4.75% for BPL services. Contingent upon the agreement being approved, the SFF is 1.00% plus the GUF of 0.077165% to account for fees and taxes applied to the SFF.
EXCEPTIONS Electric service subject to the Supplemental Franchise Fee Rider does not include City of El Paso accounts.

Section Number	1	Revision Number	Original
Sheet Number	30.1	Effective	with bills issued on or after the
Page	1 of 2		first billing cycle in May 2018

ATTACHMENT A
EL PASO ELECTRIC COMPANY	N
SCHEDULE NO. 94	N
SUPPLEMENTAL FRANCHISE FEE RIDER	N

EFFECTIVE DATE The later of May 1, 2018, or the first day of the calendar quarter that occurs thirty days following the date this tariff becomes final and non-appealable.	N
TERMS AND CONDITIONS The Company’s Rules and Regulations apply to service under this rate schedule.

Section Number	1	Revision Number	Original
Sheet Number	30.1	Effective	with bills issued on or after the
Page	2 of 2		first billing cycle in May 2018

EX-15

Exhibit 15

August 3, 2018

El Paso Electric Company

El Paso, Texas

Re: Registration Statement No. 333-142557, 333-196628, and 333-220642

With respect to the subject registration statements, we acknowledge our awareness of the use therein of our report dated August 3, 2018 related to our review of interim financial information.

Pursuant to Rule 436 under the Securities Act of 1933 (the Act), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG LLP

Houston, Texas

EX-31.01

EXHIBIT 31.01

CERTIFICATIONS

I, Mary E. Kipp, certify that:

1. I have reviewed this quarterly report on Form 10-Q of El Paso Electric Company (the "Company"):

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the Company's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the Company's internal control over financial reporting that occurred during the Company's most recent fiscal quarter (the Company's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting; and

5. The Company's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company's auditors and the audit committee of the Company's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Company's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company's internal control over financial reporting.

Dated: August 3, 2018

EL PASO ELECTRIC COMPANY
By:	/s/ Mary E. Kipp
	Mary E. Kipp
	President and Chief Executive Officer
	(Principal Executive Officer)

I, Nathan T. Hirschi, certify that:

1. I have reviewed this quarterly report on Form 10-Q of El Paso Electric Company (the "Company"):

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in this report;

4. The Company's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Company and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the Company's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the Company's internal control over financial reporting that occurred during the Company's most recent fiscal quarter (the Company's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting; and

5. The Company's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company's auditors and the audit committee of the Company's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Company's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Company's internal control over financial reporting.

Dated: August 3, 2018

EL PASO ELECTRIC COMPANY
By:	/s/ Nathan T. Hirschi
	Nathan T. Hirschi
	Senior Vice President -
	Chief Financial Officer
	(Principal Financial Officer)

EX-32.01

EXHIBIT 32.01

August 3, 2018

The certification set forth below is being submitted in connection with the Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2018 (the "Report") of El Paso Electric Company (the "Company") for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 (the "Exchange Act") and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Mary E. Kipp and Nathan T. Hirschi, each certifies that, to the best of their knowledge:

1.the Report fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 /s/ Mary E. Kipp

Mary E. Kipp

President and Chief Executive Officer

/s/ Nathan T. Hirschi

Nathan T. Hirschi

Senior Vice President -

Chief Financial Officer

XML

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 31, 2018
Document and Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Trading Symbol	ee
Entity Registrant Name	EL PASO ELECTRIC CO /TX/
Entity Central Index Key	0000031978
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		40,691,320

XML

Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Utility plant:
Electric plant in service	$ 4,062,509	$ 3,982,095
Less accumulated depreciation and amortization	(1,352,503)	(1,320,175)
Net plant in service	2,710,006	2,661,920
Construction work in progress	169,536	146,059
Nuclear fuel; includes fuel in process of $60,240 and $59,689, respectively	195,453	194,933
Net nuclear fuel	122,195	120,458
Net utility plant	3,001,737	2,928,437
Current assets:
Cash and cash equivalents	11,923	6,990
Accounts receivable, principally trade, net of allowance for doubtful accounts of $1,653 and $2,300, respectively	107,084	88,585
Inventories, at cost	49,432	50,910
Under-collection of fuel revenues, regulatory asset	965	0
Prepayments and other	15,901	10,307
Total current assets	185,305	156,792
Deferred charges and other assets:
Decommissioning trust funds	287,126	286,866
Regulatory assets	89,335	96,036
Other	16,622	16,232
Total deferred charges and other assets	393,083	399,134
Total assets	3,580,125	3,484,363
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 65,670,746 and 65,694,829 shares issued, and 157,942 and 133,859 restricted shares, respectively	65,829	65,829
Capital in excess of stated value	326,042	326,117
Retained earnings	1,198,767	1,159,667
Accumulated other comprehensive income (loss), net of tax	(33,746)	11,058
Total stockholders' equity subtotal before treasury stock	1,556,892	1,562,671
Treasury stock, 25,135,367 and 25,244,350 shares, respectively, at cost	(418,690)	(420,506)
Common stock equity	1,138,202	1,142,165
Long-term debt, net of current portion	1,385,154	1,195,988
Total capitalization	2,523,356	2,338,153
Current liabilities:
Short-term borrowings under the revolving credit facility	80,445	173,533
Accounts payable, principally trade	51,959	59,270
Taxes accrued	29,148	35,660
Interest accrued	12,749	12,470
Over-collection of fuel revenues, regulatory liability	8,174	6,225
Other	39,341	29,067
Total current liabilities	221,816	316,225
Deferred credits and other liabilities:
Accumulated deferred income taxes	305,832	305,023
Accrued pension liability	79,334	83,838
Accrued post-retirement benefit liability	27,497	26,417
Asset retirement obligation	97,059	93,029
Regulatory liabilities	298,243	296,685
Other	26,988	24,993
Total deferred credits and other liabilities	834,953	829,985
Commitments and contingencies
Total capitalization and liabilities	3,580,125	3,484,363
Nuclear Fuel
Utility plant:
Less accumulated depreciation and amortization	$ (73,258)	$ (74,475)

XML

Balance Sheets Parenthetical - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Nuclear fuel; fuel in process	$ 60,240	$ 59,689
Allowance for Doubtful Accounts Receivable, Current	$ 1,653	$ 2,300
Common Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares Issued	65,670,746	65,694,829
Common stock, Restricted shares	157,942	133,859
Treasury Stock, Shares	25,135,367	25,244,350

XML

Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating revenues	$ 236,796	$ 251,843	$ 412,509	$ 423,178	$ 906,128	$ 934,440
Operating expenses:
Fuel and purchased power	53,463	65,894	105,651	116,173	234,229	248,920
Operations and maintenance	88,855	82,273	169,015	161,460	327,836	321,070
Depreciation and amortization	23,958	22,495	47,772	44,429	94,186	81,601
Taxes other than income taxes	17,381	17,265	32,888	32,995	70,756	68,396
Utilities operating expense	183,657	187,927	355,326	355,057	727,007	719,987
Operating income	53,139	63,916	57,183	68,121	179,121	214,453
Other income (deductions):
Allowance for equity funds used during construction	718	726	1,638	1,541	3,122	4,095
Investment and interest income, net	11,072	12,056	16,227	21,319	33,761	39,251
Miscellaneous non-operating income	3,072	2,897	6,208	5,792	12,466	11,404
Miscellaneous non-operating deductions	(2,769)	(2,669)	(5,512)	(5,497)	(11,594)	(11,404)
Nonoperating income	12,093	13,010	18,561	23,155	37,755	43,346
Interest charges (credits):
Interest on long-term debt and revolving credit facility	18,194	18,407	36,182	36,774	72,378	73,421
Other interest	5,115	4,728	9,769	9,073	18,866	17,473
Capitalized interest	(1,365)	(1,344)	(2,579)	(2,638)	(4,963)	(5,133)
Allowance for borrowed funds used during construction	(772)	(711)	(1,670)	(1,502)	(3,143)	(3,452)
Interest expense	21,172	21,080	41,702	41,707	83,138	82,309
Income before income taxes	44,060	55,846	34,042	49,569	133,738	175,490
Income tax expense	10,765	19,780	7,713	17,492	41,225	63,121
Net income	$ 33,295	$ 36,066	$ 26,329	$ 32,077	$ 92,513	$ 112,369
Basic earnings per share	$ 0.82	$ 0.890	$ 0.650	$ 0.790	$ 2.280	$ 2.770
Diluted earnings per share	0.82	0.890	0.650	0.790	2.270	2.770
Dividends declared per share of common stock	$ 0.360	$ 0.335	$ 0.695	$ 0.645	$ 1.365	$ 1.265
Weighted average number of shares outstanding	40,517,713	40,409,030	40,504,526	40,398,192	40,467,231	40,381,776
Weighted average number of shares and dilutive potential shares outstanding	40,647,799	40,525,585	40,618,045	40,499,344	40,594,049	40,466,995

XML

Statements Of Comprehensive Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income	$ 33,295	$ 36,066	$ 26,329	$ 32,077	$ 92,513	$ 112,369
Unrecognized pension and post-retirement benefit costs:
Net gain (loss) arising during period	0	0	0	0	12,634	(20,053)
Prior service benefit	0	0	0	0	0	32,697
Reclassification adjustments included in net income for amortization of:
Prior service benefit	(2,414)	(2,413)	(4,830)	(4,829)	(9,658)	(8,906)
Net loss	1,575	1,694	3,150	3,388	6,538	5,908
Net unrealized gains/loss on marketable securities:
Net holding gains (losses) arising during period	(1,253)	4,458	(3,961)	12,179	9,135	15,643
Reclassification adjustments for net (gains) losses included in net income	147	(5,166)	665	(7,357)	(2,604)	(11,499)
Net losses on cash flow hedges:
Reclassification adjustment for interest expense included in net income	140	132	279	262	549	515
Total other comprehensive income (loss) before income taxes	(1,805)	(1,295)	(4,697)	3,643	16,594	14,305
Income tax benefit (expense) related to items of other comprehensive income (loss):
Unrecognized pension and post-retirement benefit costs	190	261	346	454	(3,723)	(4,029)
Net unrealized (gains) losses on marketable securities	221	132	656	(989)	(1,277)	(773)
Losses on cash flow hedges	(31)	(47)	(81)	(125)	(179)	(336)
Total income tax benefit (expense)	380	346	921	(660)	(5,179)	(5,138)
Other comprehensive income (loss), net of tax	(1,425)	(949)	(3,776)	2,983	11,415	9,167
Comprehensive income	$ 31,870	$ 35,117	$ 22,553	$ 35,060	$ 103,928	$ 121,536

XML

Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 26,329	$ 32,077
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of electric plant in service	47,772	44,429
Amortization of Nuclear Fuel	19,570	21,100
Deferred income taxes, net	4,204	15,339
Allowance for equity funds used during construction	(1,638)	(1,541)
Other amortization and accretion	10,350	9,991
Net gain on decommissioning trust funds	(593)	(7,357)
Other operating activities	11	(641)
Change in:
Accounts receivable	(23,516)	(32,684)
Inventories	1,906	(2,791)
Prepayments and other	(8,192)	(6,294)
Accounts payable	(6,405)	(1,262)
Taxes accrued	(4,460)	(4,014)
Interest accrued	279	86
Net over-collection of fuel revenues	984	2,667
Other current liabilities	10,274	3,530
Deferred charges and credits	(2,448)	(4,644)
Net cash provided by operating activities	74,427	67,991
Cash flows from investing activities:
Cash additions to utility property, plant and equipment	(117,349)	(108,113)
Cash additions to nuclear fuel	(18,930)	(20,647)
Insurance proceeds received for equipment	5,351	1,725
Capitalized interest and AFUDC:
Utility property, plant and equipment	(3,308)	(3,043)
Nuclear fuel and other	(2,579)	(2,638)
Allowance for equity funds used during construction	1,638	1,541
Decommissioning trust funds:
Purchases, including funding of $1.1 million and $2.3 million, respectively	(47,896)	(65,960)
Sales and maturities	44,933	62,531
Other investing activities	2,134	(928)
Net cash used for investing activities	(136,006)	(135,532)
Cash flows from financing activities:
Dividends paid	(28,257)	(26,157)
Borrowings under the revolving credit facility:
Proceeds	419,559	292,404
Payments	(512,647)	(195,094)
Other financing activities	(2,143)	(757)
Net cash provided by financing activities	66,512	70,396
Net increase in cash and cash equivalents	4,933	2,855
Cash and cash equivalents at beginning of period	6,990	8,420
Cash and cash equivalents at end of period	11,923	11,275
4.22% Senior Notes, due 2028
Cash flows from financing activities:
Proceeds from issuance of senior notes	125,000	0
4.07% RGRT Senior Notes, due 2025
Cash flows from financing activities:
Proceeds from issuance of senior notes	$ 65,000	$ 0

XML

Statements Of Cash Flows Parenthetical - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Payments to fund Decommissioning Fund	$ 1.1	$ 2.3

XML

Principles Of Preparation

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Principles Of Preparation

Principles of Preparation

These condensed financial statements should be read in conjunction with the financial statements and notes thereto in the Annual Report of El Paso Electric Company on Form 10-K for the fiscal year ended December 31, 2017 ("2017 Form 10-K"). Capitalized terms used in this report and not defined herein have the meaning ascribed to such terms in the 2017 Form 10-K. In the opinion of the Company’s management, the accompanying financial statements contain all adjustments necessary to present fairly the financial position of the Company at June 30, 2018 and December 31, 2017; the results of its operations and comprehensive operations for the three, six and twelve months endedJune 30, 2018 and 2017; and its cash flows for the six months endedJune 30, 2018 and 2017. The results of operations and comprehensive operations for the three, six and twelve months ended June 30, 2018 and 2017, and the cash flows for the six months endedJune 30, 2018 and 2017, are not necessarily indicative of the results to be expected for the full calendar year.

Pursuant to the rules and regulations of the U.S. Securities Exchange Commission ("SEC"), certain financial information has been condensed and certain footnote disclosures have been omitted. Such information and disclosures are normally included in financial statements prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP").

Reclassification. Certain amounts in the financial statements for 2017 have been reclassified to conform with the 2018 presentation. The Company implemented Accounting Standards Update ("ASU") 2017-07, Compensation - Retirement Benefits, and ASU 2016-15, Statement of Cash Flows, in the first quarter of 2018, retrospective to all periods presented in the Company's financial statements. See "New Accounting Standards Adopted" below for further details.

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company evaluates its estimates on an on-going basis, including those related to depreciation, unbilled revenue, income taxes, fuel costs, pension and other post-retirement obligations and asset retirement obligations ("AROs"). Actual results could differ from those estimates.

Revenues. The Company recognizes revenue associated with contracts with customers when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. Unbilled revenues are recorded for estimated amounts of energy delivered in the period following the customer's last billing cycle to the end of the reporting period. Unbilled revenues are estimated based on monthly generation volumes and by applying an average revenue/kilowatt-hour ("kWh") to the number of estimated kWhs delivered but not billed. Accounts receivable included accrued unbilled revenues of $38.3 million at June 30, 2018 and $22.2 million at December 31, 2017. The Company presents revenues net of sales taxes in its statements of operations.

Depreciation. The Company routinely evaluates the depreciable service lives, cost of removal and salvage values of its property, plant and equipment. Depreciation is provided on a straight-line basis over the estimated remaining lives of the assets (ranging in average from 5 to 48 years). When property subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its cost together with the cost of removal, less salvage is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation is removed from the balance sheet accounts and a gain or loss is recognized.

New Accounting Standards Adopted

In March 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting, to simplify the accounting for share-based payment transactions, including the income tax consequences, classification of awards either as equity or liabilities, and classification on the statements of cash flows. The Company adopted the new standard effective January 1, 2017. The adoption of the new standard did not have a material impact on the Company’s financial condition, results of operations or cash flows. The cumulative effect of the adoption of the new standard was to increase net operating loss carryforward deferred tax assets and retained earnings by $0.2 million on January 1, 2017.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to provide a framework that replaces the existing revenue recognition guidance, and has since modified the standard with several ASUs. The standard provides that an entity should recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. On January 1, 2018, the Company adopted the new accounting standard using the modified retrospective method. There was no cumulative effect adjustment at the initial application of the new standard. In addition, comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company expects the ongoing impact of the new standard to be immaterial to net income. As required by the standard, revenues of $3.8 million related to reimbursed costs of energy efficiency programs approved by the Company's regulators are reported in year-to-date operating revenues from customers prospectively, as opposed to being offset with associated costs within operations and maintenance. Related expenses of an equal amount are reported in operations and maintenance expenses. See Note B, Revenues, for additional information.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Liabilities, to enhance the reporting model for financial instruments by addressing certain aspects of recognition, measurement, presentation and disclosure. The Company adopted the new standard effective January 1, 2018. The adoption of ASU 2016-01 eliminates the requirements to classify investments in equity securities with readily determinable fair values into trading or available for sale and requires entities to measure equity investments at fair value and recognize any changes in fair value in the Statements of Operations. ASU 2016-01 requires a modified-retrospective approach and therefore comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Upon adoption of the new standard, the Company recorded a cumulative effect adjustment, net of income taxes, to increase retained earnings by $41.0 million with an offset to accumulated other comprehensive income ("AOCI"). In addition, the Company recorded net losses of $2.8 million related to equity securities still held at June 30, 2018. In March 2018, the FASB issued ASU 2018-04, Investments - Debt Securities (Topic 320) and Regulated Operations (Topic 980), which provides clarification to ASU 2016-01.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments, to reduce diversity in practice in how certain cash receipts and cash payments are classified in the statement of cash flows. The Company adopted the new standard effective January 1, 2018. ASU 2016-15 was applied using a retrospective transition method to each period presented. Accordingly, the Company presented in the Statement of Cash Flows insurance proceeds received for equipment of $5.4 million and $1.7 million, respectively, for the six months ended June 30, 2018 and 2017 as cash inflows from investing activities.

In March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715) Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. ASU 2017-07 amends Accounting Standards Codification ("ASC") 715, Compensation - Retirement Benefits, to require companies to present the service cost component of net benefit cost in the income statement line items where compensation cost is reported. Companies will present all other components of net benefit cost separately from the line item(s) that includes the service cost and outside of any subtotal of operating income. In addition, only the service cost component will be eligible for capitalization in assets. The Company adopted the new standard effective January 1, 2018. The amendments in ASU 2017-07 were applied retrospectively for the income statement presentation of the service cost component and the other components of net benefit costs. The Company elected to apply the practical expedient and used the amounts disclosed in its pension and other postretirement benefit plan note for the 2017 comparative period as the estimation basis for applying the retrospective presentation requirements. See Note J, Employee Benefits, for additional information.

In March 2018, the FASB issued ASU 2018-05, Income Taxes (Topic 740) Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 ("SAB 118"), to add various SEC paragraphs for clarification due to the Federal Tax Cuts and Jobs Act of 2017 ("TCJA"). The Company adopted ASU 2018-05 upon issuance and implemented SAB 118 in December of 2017 in conjunction with the enactment of the TCJA.

New Accounting Standards to be Adopted in the Future

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requiring qualitative and quantitative disclosures on leasing agreements. ASU 2016-02 maintains a distinction between finance leases and operating leases similar to the distinction under previous lease guidance for capital leases and operating leases. The impact of leases reported in the Company's operating results and statement of cash flows is expected to be similar to previous GAAP. ASU 2016-02 requires the recognition in the statement of financial position, by the lessee, of a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. How leases are recorded in regard to financial position represents a significant change from previous GAAP guidance. The lessee is permitted to make an accounting policy election to not recognize lease assets and lease liabilities for short-term leases. Implementation of the standard will be required for reporting periods beginning after December 15, 2018. Adoption of the new lease accounting standard will require the Company to apply the new standard to the earliest period using a modified retrospective approach. The Company is currently in the process of evaluating the impact of the new standard, which includes continuing to monitor activities of the FASB, including the impact of ASU 2018-01, Land Easement Practical expedient for Transition to Topic 842 and ASU 2018-11, Targeted Improvements. ASU 2018-11 allows entities to adopt the standard with a cumulative effect adjustment as of the beginning of the adoption year, while maintaining prior year comparative financial information and disclosures as reported. ASU 2018-01 provides an optional practical expedient to not evaluate existing or expired land easements under Topic 842, if those land easements were not previously accounted for as leases under ASC Topic 840. The Company currently anticipates that it will apply the practical expedient under ASU 2018-01 to its existing or expired land easements as part of its transition to Topic 842. The Company's evaluation process also includes evaluating the impact, if any, on changes to business processes, systems and controls to support recognition and disclosure under the new guidance; however, at this time the Company is unable to determine the impact this standard will have on the financial statements and related disclosures.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). ASU 2016-13 changes how companies measure and recognize credit impairment for many financial assets. The new current expected credit loss model will require companies to immediately recognize an estimate of credit losses expected to occur over the remaining life of the financial assets that are in the scope of the standard. The ASU also makes targeted amendments to the current impairment model for available-for-sale debt securities. ASU 2016-13 will be required for reporting periods beginning after December 15, 2019. ASU 2016-13 will be applied in a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is implemented. The Company is currently assessing the future impact of ASU 2016-13.

In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220), as a result of concerns raised due to the TCJA. More specifically, because the remeasurement of deferred taxes due to the change in the federal corporate income tax rate is required to be included in income from continuing operations, the tax effects of items within AOCI (referred to as stranded tax effects) do not reflect the appropriate tax rate. ASU 2018-02 generally allows companies to reclassify stranded taxes from AOCI to retained earnings. The amount of the adjustment would be the difference between the historical federal corporate income tax rate of 35% and the newly enacted 21% federal corporate income tax rate. The provisions of ASU 2018-02 are effective for fiscal years and interim periods within that reporting period beginning after December 15, 2018. Early adoption is permitted, including adoption in any interim periods for reporting periods for which financial statements have not been issued. The Company is currently evaluating the impact of ASU 2018-02 and its impact on regulated utilities. At June 30, 2018, stranded taxes in AOCI are approximately $7.2 million.

Supplemental Cash Flow Disclosures (in thousands)
		Six Months Ended
		June 30,
		2018			2017
Cash paid (received) for:
	Interest on long-term debt and borrowings under the revolving credit facility	$	35,706		$	35,304
	Income tax paid, net	1,636			2,251
Non-cash investing and financing activities:
	Changes in accrued plant additions	(906		)	(9,105		)
	Grants of restricted shares of common stock	1,030			1,171
	Issuance of performance shares	1,499			932

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Revenues

6 Months Ended

Jun. 30, 2018

Revenue Recognition [Abstract]

Revenue Recognition Disclosure

Revenues

On January 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606), for all of its contracts using the modified retrospective method. There was no cumulative effect adjustment at the initial application of the new standard. In addition, comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company expects the ongoing impact of the new standard to be immaterial to net income and no significant changes in the Company's business processes and internal controls were necessary upon adoption of the new standard.

The following table disaggregates revenue from contracts with customers, for the three, six and twelve months ended June 30, 2018 (in thousands):

	June 30, 2018
	Three Months Ended		Six Months Ended		Twelve Months Ended
Retail	$	220,980	$	367,607	$	812,522
Wholesale	10,957		35,101		71,610
Wheeling (transmission)	4,147		8,433		17,732
Total revenues from contracts with customers	236,084		411,141		901,864
Other	712		1,368		4,264
Total operating revenues	$	236,796	$	412,509	$	906,128

The Company recognizes revenue when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. The Company has elected the optional invoice practical expedient for Wholesale and Wheeling revenues, as the invoice amount will correspond directly to the value provided by the Company's performance to date.

Retail. Retail contracts represent the Company's primary revenue source. The Company has determined that retail electric service to residential, commercial and industrial, and public authority customers represents an implied daily contract with the customer. The contract is comprised of an obligation to supply and distribute electricity and related capacity. Revenue is recognized, over time, equal to the product of the applicable tariff rates, as approved by the Public Utility Commission of Texas (the "PUCT") and the New Mexico Public Regulation Commission, (the "NMPRC"), and the volume of the electricity delivered to the customer, or through the passage of time based upon providing the service of standing ready. Unbilled revenues are recognized at month end based on estimated monthly generation volumes and by applying an average revenue per kWh to the number of estimated kWhs delivered but not billed to customers, and recorded as a receivable for the period following the last billing cycle to the end of the reporting period. Retail customers receive a bill monthly, with payment due sixteen days after issuance.

Wholesale. Wholesale contracts primarily include forward power sales into markets outside the Company’s service territory when the Company has competitive generation capacity available, after meeting its regulated service obligations. Pricing is either fixed or based on an index rate with consideration potentially including variable components. Uncertainties regarding the variable consideration will be resolved when the transaction price is known at the point of delivering the energy. The obligation to deliver the electricity is satisfied over time as the customer receives and consumes the electricity. Wholesale customers are invoiced on the 10^th day of each month, with payment due by the 20^th day of the month. In the case of the sale of renewable energy certificates, the transaction price is allocated to the performance obligation to deliver the confirmed quantity of the certificates based on the stand alone selling price of each certificate. Revenue is recognized as control of the certificates is transferred to the customer. The customer is invoiced upon the completed transfer of the certificates, with payment due within ten business days.Wholesalealso includes an annual agreement between the Company and one of its wholesale customers, Rio Grande Electric Cooperative ("RGEC"), which involves the provision of full requirements electric service from the Company to RGEC. The rates for this service are recalculated annually and require Federal Energy Regulatory Commission ("FERC") approval.

Wheeling (transmission). Wheeling involves the Company providing point-to-point transmission service, which includes the receipt of capacity and energy at designated point(s) and the transfer of such capacity and energy to designated point(s) of delivery on either a firm or non-firm basis for periods of one year or less. The performance obligation to provide capacity and transmit energy is satisfied over time as the Company performs. Transmission customers are invoiced on a monthly basis, with payment due within twenty days of receipt of the invoice.

Other. Other includes alternative revenue program revenue relating to the Company’s potential bonus awards from the PUCT and the NMPRC mandated energy efficiency programs. Both the PUCT and the NMPRC allow for the potential to earn an incentive bonus if the Company achieves its approved energy efficiency goals under the applicable programs. The Company recognizes revenue related to the energy efficiency program incentives at the point in time that the amount is objectively determinable generally based upon an approved order from the regulator, is probable of recovery, and if it is expected to be collected within 24 months. Other revenue also includes (i) late payment fees, (ii) leasing income, and (iii) the Company’s allocated share, based on ownership, of sales of surplus effluent water from Palo Verde Generating Station ("Palo Verde").

Accounts receivable. Accounts receivable is principally comprised of revenue from contracts with customers. The Company recognizes expense for accounts that are deemed uncollectible in operating expense. The Company recognized $0.5 million, $1.0 million and $3.2 million of uncollectible expense for the three, six and twelve months endedJune 30, 2018, respectively.

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Accumulated Other Comprehensive Income (Notes)

6 Months Ended

Jun. 30, 2018

Accumulated Other Comprehensive Income (Loss) [Line Items]

Comprehensive Income (Loss) Note

Accumulated Other Comprehensive Income (Loss)

Upon adoption of ASU 2016-01, Financial Instruments-Overall, the Company recorded, on January 1, 2018, a cumulative effect adjustment, net of income taxes, to increase retained earnings by $41.0 million with an offset to AOCI. Changes in Accumulated Other Comprehensive Income (Loss) (net of tax) by component are presented below (in thousands):
		Three Months Ended June 30, 2018												Three Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Debt Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(18,475	)	$	(2,593	)	$	(11,253	)	$	(32,321	)	$	(24,457	)	$	32,872		$	(11,599	)	$	(3,184	)
	Other comprehensive income before reclassifications	—			(1,000		)	—			(1,000		)	—			3,558			—			3,558
	Amounts reclassified from accumulated other comprehensive income (loss)	(649		)	115			109			(425		)	(458		)	(4,134		)	85			(4,507		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)
		Six Months Ended June 30, 2018												Six Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(17,790	)	$	40,190		$	(11,342	)	$	11,058		$	(23,928	)	$	28,463		$	(11,651	)	$	(7,116	)
	Cumulative effect adjustment	—			(41,028		)	—			(41,028		)	—			—			—			—
	Other comprehensive income before reclassifications	—			(3,159		)	—			(3,159		)	—			9,723			—			9,723
	Amounts reclassified from accumulated other comprehensive income (loss)	(1,334		)	519			198			(617		)	(987		)	(5,890		)	137			(6,740		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)

		Twelve Months Ended June 30, 2018												Twelve Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)	$	(30,532	)	$	28,925		$	(11,693	)	$	(13,300	)
	Cumulative effect adjustment	—			(41,028		)	—			(41,028		)	—			—			—			—
	Other comprehensive income before reclassifications	7,951			7,369			—			15,320			7,363			12,661			—			20,024
	Amounts reclassified from accumulated other comprehensive income (loss)	(2,160		)	(2,115		)	370			(3,905		)	(1,746		)	(9,290		)	179			(10,857		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)

Amounts reclassified from Accumulated Other Comprehensive Income (Loss) for the three, six and twelve months ended June 30, 2018 and 2017 are as follows (in thousands):

Details about Accumulated Other Comprehensive Income (Loss) Components		Three Months Ended June 30,						Six Months Ended June 30,						Twelve Months Ended June 30,						Affected Line Item in the Statements of Operations
		2018			2017			2018			2017			2018			2017
Amortization of pension and post-retirement benefit costs:
	Prior service benefit	$	2,414		$	2,413		$	4,830		$	4,829		$	9,658		$	8,906		Miscellaneous non-operating income
	Net loss	(1,575		)	(1,694		)	(3,150		)	(3,388		)	(6,538		)	(5,908		)	Miscellaneous non-operating deductions
		839			719			1,680			1,441			3,120			2,998			Income (loss) before income taxes
	Income tax effect	(190		)	(261		)	(346		)	(454		)	(960		)	(1,252		)	Income tax (benefit) expense
		649			458			1,334			987			2,160			1,746			Net income (loss)
Marketable securities:
	Net realized gain (loss) on sale of securities	(147		)	5,166			(665		)	7,357			2,604			11,499			Investment and interest income, net
		(147		)	5,166			(665		)	7,357			2,604			11,499			Income (loss) before income taxes
	Income tax effect	32			(1,032		)	146			(1,467		)	(489		)	(2,209		)	Income tax (benefit) expense
		(115		)	4,134			(519		)	5,890			2,115			9,290			Net income (loss)
Loss on cash flow hedge:
	Amortization of loss	(140		)	(132		)	(279		)	(262		)	(549		)	(515		)	Interest on long-term debt and revolving credit facility
		(140		)	(132		)	(279		)	(262		)	(549		)	(515		)	Income (loss) before income taxes
	Income tax effect	31			47			81			125			179			336			Income tax (benefit) expense
		(109		)	(85		)	(198		)	(137		)	(370		)	(179		)	Net income (loss)
	Total reclassifications	$	425		$	4,507		$	617		$	6,740		$	3,905		$	10,857

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Regulation

6 Months Ended

Jun. 30, 2018

Regulated Operations [Abstract]

Regulation

Regulation

General

The rates and services of the Company are regulated by incorporated municipalities in Texas, the PUCT, the NMPRC, and the FERC. Municipal orders, ordinances and other agreements regarding rates and services adopted by Texas municipalities are subject to review and approval by the PUCT. The FERC has jurisdiction over the Company's wholesale (sales for resale) transactions, transmission service and compliance with federally-mandated reliability standards. The decisions of the PUCT, the NMPRC and the FERC are subject to judicial review.

Texas Regulatory Matters

2015 Texas Retail Rate Case Filing. On August 10, 2015, the Company filed with the City of El Paso, other municipalities incorporated in its Texas service territory, and the PUCT in Docket No. 44941, a request for an annual increase in non-fuel base revenues ("2015 Texas Retail Rate Case"). On July 21, 2016, the parties to PUCT Docket No. 44941 filed the Joint Motion to Implement Uncontested Amended and Restated Stipulation and Agreement which was unopposed by the parties. On August 25, 2016, the PUCT issued the PUCT Final Order in Docket No. 44941 ("2016 PUCT Final Order"). Interim rates associated with the annual non-fuel base rate increase became effective on April 1, 2016. The additional surcharges associated with the incremental Four Corners Generating Station ("Four Corners") costs, rate case expenses and the relate back of rates to consumption on and after January 12, 2016 through March 31, 2016, were implemented on October 1, 2016.

For financial reporting purposes, the Company deferred any recognition of the Company's request in its 2015 Texas Retail Rate Case until it received the 2016 PUCT Final Order on August 25, 2016. Accordingly, it reported in the third quarter of 2016 the cumulative effect of the 2016 PUCT Final Order, which related back to January 12, 2016.

2017 Texas Retail Rate Case Filing.On February 13, 2017, the Company filed with the City of El Paso, other municipalities incorporated in the Company's Texas service territory and the PUCT in Docket No. 46831, a request for an increase in non-fuel base revenues ("2017 Texas Retail Rate Case"). On November 2, 2017, the Company filed the Joint Motion to Implement Uncontested Stipulation and Agreement with the Administrative Law Judges for the 2017 Texas Retail Rate Case.

On December 18, 2017, the PUCT issued the PUCT Final Order in Docket No. 46831 ("2017 PUCT Final Order"), which provides, among other things, for the following: (i) an annual non-fuel base rate increase of $14.5 million; (ii) a return on equity of 9.65%; (iii) all new plant in service as filed in the Company's rate filing package was prudent and used and useful and therefore is included in rate base; (iv) recovery of the costs of decommissioning Four Corners in the amount of $5.5 million over a seven year period beginning August 1, 2017; (v) the Company to recover reasonable rate case expenses of approximately $3.4 million through a separate surcharge over a three year period; and (vi) a requirement that the Company file a refund tariff if the federal statutory income tax rate, as it relates to the Company, is decreased before the Company files its next rate case. The 2017 PUCT Final Order also established baseline revenue requirements for recovery of future transmission and distribution investment costs and includes a minimum monthly bill of $30.00 for new residential customers with distributed generation, such as private rooftop solar. Additionally, the 2017 PUCT Final Order allows for the annual recovery of $2.1 million of nuclear decommissioning funding and establishes annual depreciation expense that is approximately $1.9 million lower than the annual amount requested by the Company in its initial filing. Finally, the 2017 PUCT Final Order allows for the Company to recover revenues associated with the relate back of rates to consumption on and after July 18, 2017 through a separate surcharge.

New base rates, including additional surcharges associated with rate case expenses and the relate back of rates to consumption on and after July 18, 2017 through December 31, 2017, were implemented in January 2018.

For financial reporting purposes, the Company deferred any recognition of the Company's request in its 2017 Texas Retail Rate Case until it received the 2017 PUCT Final Order on December 18, 2017. Accordingly, it reported in the fourth quarter of 2017 the cumulative effect of the 2017 PUCT Final Order, which related back to July 18, 2017.

The 2017 PUCT Final Order required the Company to file a refund tariff if the federal statutory income tax rate, as it relates to the Company, were decreased before the Company files its next rate case. Following the enactment of the TCJA on December 22, 2017, and in compliance with the 2017 PUCT Final Order, on March 1, 2018, the Company filed with the PUCT and each of its municipalities a proposed refund tariff designed to reduce base charges for Texas customers equivalent to the expected annual decrease of $22.7 million in federal income tax expense resulting from the tax law changes. This filing was assigned PUCT Docket No. 48124. On March 27, 2018, the PUCT approved the Company's proposed refund tariff on an interim basis, subject to refund or surcharge, for customer billing effective April 1, 2018. Each of the Company's municipalities also implemented the Company's proposed tax credits on an interim basis effective April 1, 2018. The refund will be reflected in rates over a period of a year and will be updated annually until new base rates are implemented pursuant to the Company's next rate case filing. No party requested a hearing in the case before the PUCT by the deadline of April 16, 2018, and on April 18, 2018, the PUCT Staff filed its final recommendation supporting approval of the Company's application. The Company filed an agreed proposed order for final approval on behalf of all parties except the City of El Paso on April 30, 2018, and on May 31, 2018, the City of El Paso filed a notice with the PUCT stating that the City Council had authorized agreement with the proposed order. The refund tariff case is pending with the refund tariff subject to a final order from the PUCT.

Energy Efficiency Cost Recovery Factor. On May 1, 2017, the Company filed its annual application, which was assigned PUCT Docket No. 47125, to establish its energy efficiency cost recovery factor for 2018. In addition to projected energy efficiency costs for 2018 and a reconciliation of collections to prior year actual costs, the Company requested approval of an incentive bonus for the 2016 energy efficiency program results in accordance with PUCT rules. Interim rates were approved effective January 1, 2018. The Company, the PUCT Staff, and the City of El Paso reached an agreement that includes an incentive bonus of $0.8 million. The agreement was filed on January 25, 2018, and was approved by the PUCT on February 15, 2018.

On May 1, 2018, the Company filed its annual application, which was assigned PUCT Docket No. 48332, to establish its energy efficiency cost recovery factor for 2019. In addition to projected energy efficiency costs for 2019 and a reconciliation to prior year actual costs, the Company requested approval of a $1.0 million incentive bonus for the 2017 energy efficiency program results in accordance with PUCT rules. A hearing on the merits of this case is scheduled to begin on September 5, 2018. The Company cannot predict the outcome of this matter at this time.

Fuel and Purchased Power Costs. The Company's actual fuel costs, including purchased power energy costs, are recovered from customers through a fixed fuel factor. The PUCT has adopted the fuel cost recovery rule (the "Texas Fuel Rule") that allows the Company to seek periodic adjustments to its fixed fuel factor. The Company can seek to revise its fixed fuel factor based upon the approved formula at least four months after its last revision except in the month of December. The Texas Fuel Rule requires the Company to request to refund fuel costs in any month when the over-recovery balance exceeds a threshold material amount and it expects fuel costs to continue to be materially over-recovered. The Texas Fuel Rule also permits the Company to seek to surcharge fuel under-recoveries in any month the balance exceeds a threshold material amount and it expects fuel cost recovery to continue to be materially under-recovered. Fuel over and under-recoveries are considered material when they exceed 4% of the previous twelve months' fuel costs. All such fuel revenue and expense activities are subject to periodic final review by the PUCT in periodic fuel reconciliation proceedings.

On November 30, 2016, the Company filed a request, which was assigned PUCT Docket No. 46610, to increase its fixed fuel factor by approximately 28.8% to reflect increased fuel expenses primarily related to an increase in the price of natural gas used to generate power. The increase in the fixed fuel factor was effective on an interim basis January 1, 2017 and approved by the PUCT on January 10, 2017.

On October 13, 2017, the Company filed a request, which was assigned PUCT Docket No. 47692, to decrease the Texas fixed fuel factor by approximately 19% to reflect decreased fuel expenses primarily related to a decrease in the price of natural gas used to generate power. The decrease in the Texas fixed fuel factor became effective beginning with the November 2017 billing month.

On April 13, 2018, the Company filed a request with the PUCT, which was assigned Docket No. 48264, to decrease the Texas fixed fuel factor by approximately 29% to reflect decreased fuel expenses primarily related to a decrease in the price of natural gas used to generate power. On April 25, 2018, the Company's proposed fuel factors were approved on an interim basis effective for the first billing cycle of the May 2018 billing month. The revised factor was approved by the PUCT and the docket closed on May 22, 2018. The Texas fixed fuel factor will continue thereafter until changed by the PUCT. As of June 30, 2018, the Company had a net fuel over-recovery balance of approximately $8.2 million in Texas.

Fuel Reconciliation Proceeding. On September 27, 2016, the Company filed an application with the PUCT, designated as PUCT Docket No. 46308, to reconcile $436.6 million of Texas fuel and purchased power expenses incurred during the period of April 1, 2013 through March 31, 2016. On June 29, 2017, the PUCT approved a settlement in this proceeding. The settlement provides for the reconciliation of fuel and purchased power costs incurred from April 1, 2013 through March 31, 2016. Additionally, the settlement modifies and tightens the Palo Verde performance rewards measurement bands beginning with the 2018 performance period. The financial results for each of the three, six and twelve-month periods ended June 30, 2017 include a $5.0 million, pre-tax increase to income reflecting the settlement of the Texas fuel reconciliation proceeding. This amount represents Palo Verde performance rewards associated with the 2013 to 2015 performance periods net of disallowed fuel and purchased power costs as approved in the settlement. The April 1, 2016 through June 30, 2018 Texas jurisdictional fuel and purchased power costs subject to prudence review total approximately $304.3 million.

Community Solar. On June 8, 2015, the Company filed a petition with the PUCT to initiate a community solar program that includes the construction and ownership of a 3 Megawatts ("MW") solar photovoltaic system located at Montana Power Station ("MPS"). Participation is on a voluntary basis, and customers contract for a set capacity (Kilowatt ("kW")) amount and receive all energy produced. This case was assigned PUCT Docket No. 44800. The Company filed a settlement agreement among all parties on July 1, 2016, approving the program, and the PUCT approved the settlement agreement and program on September 1, 2016. On April 19, 2017, the Company announced that the entire 3 MW program was fully subscribed by approximately 1,500 Texas customers. The community solar facility began commercial operation on May 31, 2017.

On March 20, 2018, the Company filed a petition with the PUCT and each of its regulatory authorities to expand its community solar program to include 2 MW of solar powered generation from the 10 MW solar photovoltaic facility located at Newman Power Station ("Newman") and to reduce rates under the community solar tariff. The case before the PUCT was assigned Docket No. 48181 and is currently pending. The Company cannot predict the outcome of the case at this time.

Other Required Approvals. The Company has obtained other required approvals for tariffs and other approvals required by the Texas Public Utility Regulatory Act and the PUCT.

New Mexico Regulatory Matters

2015 New Mexico Rate Case Filing. On May 11, 2015, the Company filed a request with the NMPRC, in Case No. 15-00127-UT, for an annual increase in non-fuel base rates. On June 8, 2016, the NMPRC issued the NMPRC Final Order in Case No. 15-00127-UT (the "NMPRC Final Order"), which approved an annual increase in non-fuel base rates of approximately $0.6 million, an increase of approximately $0.5 million in other service fees and a decrease in the Company's allowed return on equity to 9.48%. The NMPRC Final Order concluded that all of the Company's new plant in service was reasonable and necessary and therefore would be recoverable in rates. The Company's rates were approved by the NMPRC effective July 1, 2016, and implemented at such time.

Future New Mexico Rate Case Filing. On April 12, 2017, the NMPRC issued an order in Case No. 15-00109-UT requiring the Company to make a rate filing in New Mexico no later than July 31, 2019, using an appropriate historical test year period.

New Mexico Order Commencing Review of the Effects of the TCJA on Regulated New Mexico Utilities. On January 24, 2018, the NMPRC initiated a proceeding in Case No. 18-00016-UT into the impact of the TCJA on New Mexico regulated utilities. On February 23, 2018, the Company responded to a NMPRC Staff inquiry regarding the proceeding. On April 4, 2018, the NMPRC issued an order requiring the Company to file a proposed interim rate rider to adjust the Company’s New Mexico base revenues in amounts equivalent to the Company’s reduced income tax expense for New Mexico customers resulting from the TCJA, to be implemented on or before May 1, 2018. The NMPRC order further requires that the Company record and track a regulatory liability for the excess accumulated deferred income taxes created by the change in the federal corporate income tax rate, consistent with the effective date of the TCJA, and subject to amortization determined by the NMPRC in the Company’s next general rate case. The Company recorded such a regulatory liability during the quarter ended December 31, 2017. On April 16, 2018, after consultation with the New Mexico Attorney General pursuant to the NMPRC order, the Company filed an interim rate rider with a proposed effective date of May 1, 2018. The annualized credits expected to be refunded to New Mexico customers approximate $4.9 million. On April 25, 2018, the NMPRC approved the Company's interim rate rider, which was implemented in customer bills beginning May 1, 2018.

Fuel and Purchased Power Costs. Historically, fuel and purchased power costs were recovered through base rates and a Fuel and Purchased Power Cost Adjustment Clause (the "FPPCAC") that accounts for changes in the costs of fuel relative to the amount included in base rates. Effective July 1, 2016, with the implementation of the NMPRC Final Order, fuel and purchased power costs are no longer recovered through base rates but are recovered through the FPPCAC. The Company's request to reconcile its fuel and purchased power costs for the period January 1, 2013 through December 31, 2014, also was approved in the NMPRC Final Order. New Mexico jurisdictional costs subject to prudence review are costs from January 1, 2015 through June 30, 2018 that total approximately $190.4 million. At June 30, 2018, the Company had a net fuel under-recovery balance of approximately $1.0 million in New Mexico. As required, the Company filed a request to continue use of its FPPCAC with the NMPRC on January 5, 2018, which was assigned Case No. 18-00006-UT. Hearings in the case began on July 30, 2018. The Company cannot predict the outcome of this case at this time.

5 MW Holloman Air Force Base ("HAFB") Facility Certificate of Convenience and Necessity ("CCN"). On October 7, 2015, in Case No. 15-00185-UT, the NMPRC issued a final order approving a CCN for a 5 MW solar power generation facility located on HAFB in the Company's service territory in New Mexico. The Company and HAFB negotiated a retail contract, which includes a power sales agreement for the facility, to replace the existing load retention agreement which was approved by NMPRC final order issued October 5, 2016 in Case No. 16-00224-UT. Construction of the solar generation facility is expected to be completed in the third quarter of 2018.

New Mexico Efficient Use of Energy Recovery Factor. On July 1, 2016, the Company filed its annual application requesting approval of its 2017 Energy Efficiency and Load Management Plan and to establish energy efficiency cost recovery factors for 2017. In addition to projected energy efficiency costs for 2017, the Company requested approval of a $0.4 million incentive for 2017 energy efficiency programs in accordance with NMPRC rules. This application was assigned Case No. 16-00185-UT. On February 22, 2017, the NMPRC issued a final order approving the Company’s 2017 Energy Efficiency and Load Management Plan and authorizing recovery in 2017 of a base incentive of $0.4 million. The Company’s energy efficiency cost recovery factors were approved and effective in customer bills beginning on March 1, 2017. NMPRC rules authorize continuation of the energy efficiency programs and incentive approved in Case No. 16-00185-UT through 2018.

On July 1, 2016, the Company filed its 2015 Annual Report for Energy Efficiency Programs, which included an incentive for verified 2015 program performance of $0.3 million, which was approved in Case No. 13-00176-UT. The Company recorded the $0.3 million approved incentive in operating revenues in the first quarter of 2017. In addition, on June 30, 2017, the Company filed its 2016 Annual Report for Energy Efficiency Programs, which included an incentive for verified 2016 program performance of $0.4 million that was approved in Case No. 13-00176-UT. The Company recorded the $0.4 million approved incentive in operating revenues in the third quarter of 2017.

On July 2, 2018, the Company filed its required application for approval of its 2019-2021 Energy Efficiency and Load Management Plan and cost recovery factor. The application includes a request for a base incentive of 7.1% of program expenditures, or approximately $0.4 million annually for 2019-2021. The application was assigned Case No. 18-00116-UT and is currently pending. The Company cannot predict the outcome of this case at this time.

Community Solar. On April 24, 2018, the Company filed an application with the NMPRC to initiate a community solar program to include construction and ownership of a 2 MW solar photovoltaic system located in Doña Ana County near the City of Las Cruces. Customer participation will be on a voluntary basis, and customers will contract for a set capacity (kW) amount and receive all energy produced by their subscribed capacity. The application was assigned Case No. 18-00099-UT and is currently pending. The Company cannot predict the outcome of this case at this time.

Issuance of Long-Term Debt, Securities Financing, and Guarantee of Debt. On October 7, 2015, the Company received approval in NMPRC Case No. 15-00280-UT to guarantee the issuance of up to $65.0 million of long-term debt by the Rio Grande Resources Trust II (the "RGRT") to finance future purchases of nuclear fuel and to refinance existing nuclear fuel debt obligations, which remains effective. Under this authorization, on June 28, 2018, the RGRT completed the sale of $65.0 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025 (the "RGRT Notes"). On October 4, 2017, the Company received additional approval in NMPRC Case No. 17-00217-UT to amend and extend the Company's Revolving Credit Facility (the "RCF"), issue up to $350.0 million in long-term debt and to redeem and refinance the $63.5 million 2009 Series A 7.25% Pollution Control Bonds and the $37.1 million 2009 Series B 7.25% Pollution Control Bonds, which have optional redemptions beginning in 2019. The NMPRC approval to issue $350.0 million in long-term debt supersedes its prior approval. Under this authorization, on June 28, 2018, the Company issued $125.0 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028. See Note L, Long-Term Debt and Financing Obligations.

Other Required Approvals. The Company has obtained other required approvals for tariffs and other approvals as required by the New Mexico Public Utility Act and the NMPRC.

Federal Regulatory Matters

Inquiry Regarding the Effect of the TCJA on Commission-Jurisdictional Rates and Order to Show Cause. On March 15, 2018, the FERC issued two show cause orders under Section 206 of the Federal Power Act and Rule 209(a) of the FERC’s Rules of Practice and Procedure, directing 48 individual public utilities with stated transmission rates or transmission formula rates with a fixed line item of 35% for the federal income tax component to, within 60 days of the date of the orders, either (1) propose revisions to their transmission rates under their open access transmission tariffs or transmission owner tariffs on file with the FERC, or (2) show cause why they should not be required to do so. The Company was included in the list of public utilities impacted by the FERC orders. On May 14, 2018, the Company submitted its response, as required by the FERC order, which demonstrated that the reduced annual income tax does not cause the Company's total transmission revenues to become excessive and therefore no rate reduction was justified. Instead, the Company stated in its response that it will make preparations for a future filing in which it will seek approval for revised Open Access Transmission Tariff ("OATT") rates that would include the recovery of an increased total transmission revenue requirement from OATT customers based on current circumstances and appropriate forward-looking adjustments. The Company cannot predict the outcome of this matter at this time.

Issuance of Long-Term Debt, Securities Financing, and Guarantee of Debt. On October 31, 2017, the FERC issued an order in Docket No. ES17-54-000 approving the Company’s filing to (i) amend and extend the RCF; (ii) issue up to $350.0 million in long-term debt; (iii) guarantee the issuance of up to $65.0 million of long-term debt by the RGRT; and (iv) redeem and refinance the $63.5 million 2009 Series A 7.25% Pollution Control Bonds and the $37.1 million 2009 Series B 7.25% Pollution Control Bonds, which have optional redemptions beginning in 2019. The order also approved the Company's request to continue to utilize the Company's existing RCF with the ability to amend and extend at a future date. The authorization is effective from November 15, 2017 through November 14, 2019 and supersedes prior FERC approvals. Under this authorization, on June 28, 2018, the Company issued $125.0 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028 and the RGRT completed the sale of $65.0 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025. See Note L, Long-Term Debt and Financing Obligations.

Other Required Approvals. The Company has obtained required approvals for rates, tariffs and other approvals as required by the FERC.

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Palo Verde

6 Months Ended

Jun. 30, 2018

Palo Verde [Abstract]

Palo Verde

Palo Verde

Spent Fuel and Waste Disposal. Pursuant to the Nuclear Waste Policy Act of 1982, as amended in 1987, the U.S. Department of Energy ("DOE") is legally obligated to accept and dispose of all spent nuclear fuel and other high-level radioactive waste generated by all domestic power reactors by 1998. The DOE's obligations are reflected in a contract for Disposal of Spent Nuclear Fuel and/or High Level Radioactive Waste with each nuclear power plant. The DOE failed to begin accepting spent nuclear fuel by 1998. Pursuant to the terms of the August 18, 2014 settlement agreement, and as amended with the DOE, Arizona Public Service Company ("APS") files annual claims for the period July 1 of the then-previous year to June 30 of the then-current year on behalf of itself and those utilities that share in power and energy entitlements, and bear certain allocated costs, with respect to Palo Verde pursuant to the Arizona Nuclear Power Project Participation Agreement dated August 23, 1973, as amended ("ANPP Participation Agreement").

Palo Verde Operations and Maintenance Expense. Included in "Operations and maintenance" in the Company's Statements of Operations are expenses associated with Palo Verde as follows (in thousands):

	2018		2017
Three months ended June 30,	$	24,977	$	25,931
Six months ended June 30,	47,152		47,539
Twelve months ended June 30,	98,977		98,062

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Common Stock

6 Months Ended

Jun. 30, 2018

Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]

Common Stock and Earnings Per Share Information

Common Stock

Dividends. The Company paid $14.6 million and $13.6 million in quarterly cash dividends during the three months ended June 30, 2018 and 2017, respectively. The Company paid a total of $28.3 million and $55.4 million in quarterly cash dividends during the six and twelve months ended June 30, 2018, respectively. The Company paid a total of $26.2 million and $51.3 million in quarterly cash dividends during the six and twelve months ended June 30, 2017, respectively. On July 19, 2018 the Board of Directors declared a quarterly cash dividend of $0.36 per share payable on September 28, 2018 to shareholders of record as of the close of business on September 14, 2018.

Basic and Diluted Earnings Per Share. The basic and diluted earnings per share are presented below (in thousands except for share data):
	Three Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,517,713			40,409,030
Dilutive effect of unvested performance awards	130,086			116,555
Diluted number of common shares outstanding	40,647,799			40,525,585
Basic net income per common share:
Net income	$	33,295		$	36,066
Income allocated to participating restricted stock	(124		)	(142		)
Net income available to common shareholders	$	33,171		$	35,924
Diluted net income per common share:
Net income	$	33,295		$	36,066
Income reallocated to participating restricted stock	(124		)	(142		)
Net income available to common shareholders	$	33,171		$	35,924
Basic net income per common share:
Distributed earnings	$	0.36		$	0.335
Undistributed earnings	0.46			0.555
Basic net income per common share	$	0.82		$	0.890
Diluted net income per common share:
Distributed earnings	$	0.36		$	0.335
Undistributed earnings	0.46			0.555
Diluted net income per common share	$	0.82		$	0.890

	Six Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,504,526			40,398,192
Dilutive effect of unvested performance awards	113,519			101,152
Diluted number of common shares outstanding	40,618,045			40,499,344
Basic net income per common share:
Net income	$	26,329		$	32,077
Income allocated to participating restricted stock	(98		)	(119		)
Net income available to common shareholders	$	26,231		$	31,958
Diluted net income per common share:
Net income	$	26,329		$	32,077
Income reallocated to participating restricted stock	(98		)	(119		)
Net income available to common shareholders	$	26,231		$	31,958
Basic net income per common share:
Distributed earnings	$	0.695		$	0.645
Undistributed earnings (losses)	(0.045		)	0.145
Basic net income per common share	$	0.650		$	0.790
Diluted net income per common share:
Distributed earnings	$	0.695		$	0.645
Undistributed earnings (losses)	(0.045		)	0.145
Diluted net income per common share	$	0.650		$	0.790

	Twelve Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,467,231			40,381,776
Dilutive effect of unvested performance awards	126,818			85,219
Diluted number of common shares outstanding	40,594,049			40,466,995
Basic net income per common share:
Net income	$	92,513		$	112,369
Income allocated to participating restricted stock	(336		)	(423		)
Net income available to common shareholders	$	92,177		$	111,946
Diluted net income per common share:
Net income	$	92,513		$	112,369
Income reallocated to participating restricted stock	(336		)	(423		)
Net income available to common shareholders	$	92,177		$	111,946
Basic net income per common share:
Distributed earnings	$	1.365		$	1.265
Undistributed earnings	0.915			1.505
Basic net income per common share	$	2.280		$	2.770
Diluted net income per common share:
Distributed earnings	$	1.365		$	1.265
Undistributed earnings	0.905			1.505
Diluted net income per common share	$	2.270		$	2.770

The number of restricted stock awards and performance shares at 100% performance level excluded from the calculation of the diluted number of common shares outstanding because their effect was antidilutive is presented below:
	Three Months Ended		Six Months Ended		Twelve Months Ended
	June 30,		June 30,		June 30,
	2018	2017	2018	2017	2018	2017
Restricted stock awards	55,368	58,792	63,793	68,409	65,432	62,352
Performance shares (a)	—	—	22,989	—	11,494	6,906

________________________

(a) Certain performance shares were excluded from the computation of diluted earnings per share as no payouts would have been required based upon performance at the end of each corresponding period.

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Income Taxes

6 Months Ended

Jun. 30, 2018

Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]

Income Taxes

Income Taxes

The Company files income tax returns in the U.S. federal jurisdiction and in the states of Texas, New Mexico and Arizona. The Company is no longer subject to tax examination by the taxing authorities in the federal, Texas, Arizona, and New Mexico jurisdictions for years prior to 2013.

For the three months ended June 30, 2018 and 2017, the Company’s effective tax rate was 24.4% and 35.4%, respectively. For the six months ended June 30, 2018 and 2017, the Company’s effective tax rate was 22.7% and 35.3%, respectively. For the twelve months ended June 30, 2018 and 2017, the Company's effective tax rate was 30.8% and 36.0%, respectively. The federal statutory tax rate is 21% in 2018 and 35% in 2017. The Company's effective tax rates for all periods in 2018 and 2017 differ from the federal statutory tax rate primarily due to capital gains in the decommissioning trusts which are taxed at the federal rate of 20%, the tax benefit of stock incentive plans, the allowance for equity funds used during construction ("AEFUDC"), and state taxes.

The results for the three, six and twelve months ended June 30, 2018, contain provisional estimates of the impact of the TCJA. These amounts are considered provisional because they use estimates for which tax returns have not yet been filed and because estimated amounts may be impacted by future regulatory and accounting guidance if and when issued. The Company will adjust these provisional amounts as further information becomes available and as we refine our calculations. As permitted by recent guidance issued by the SEC, these adjustments will occur during a reasonable “measurement period” not to exceed twelve months from the date of enactment.

In February 2018, the FASB issued ASU 2018-02. The Company is currently evaluating the impact of ASU 2018-02 and its impact on regulated utilities. See Note A, Principles of Preparation - New Accounting Standards to be Adopted in the Future, for additional information.

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Commitments, Contingencies And Uncertainties

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments, Contingencies And Uncertainties

Commitments, Contingencies and Uncertainties

For a full discussion of commitments and contingencies, see Note K of the Notes to Financial Statements in the 2017 Form 10-K. In addition, see Notes D and E above and Notes C and E of the Notes to Financial Statements in the 2017 Form 10-K regarding matters related to wholesale power sales contracts and transmission contracts subject to regulation and Palo Verde, including decommissioning, spent nuclear fuel and waste disposal, and liability and insurance matters.

Power Purchase and Sale Contracts

To supplement its own generation and operating reserve requirements and to meet required renewable portfolio standards, the Company engages in power purchase arrangements that may vary in duration and amount based on an evaluation of the Company's resource needs, the economics of the transactions and specific renewable portfolio requirements. For a discussion of power purchase and sale contracts that the Company has entered into with various counterparties, see Note K of the Notes to Financial Statements in the 2017 Form 10-K.

Environmental Matters

General. The Company is subject to extensive laws, regulations and permit requirements with respect to air and greenhouse gas emissions, water discharges, soil and water quality, waste management and disposal, natural resources and other environmental matters by federal, state, regional, tribal and local authorities. Failure to comply with such laws, regulations and requirements can result in actions by authorities or other third parties that might seek to impose on the Company administrative, civil and/or criminal penalties or other sanctions. In addition, releases of pollutants or contaminants into the environment can result in costly cleanup liabilities. These laws, regulations and requirements are subject to change through modification or reinterpretation, or the introduction of new laws and regulations, and as a result, the Company may face additional capital and operating costs to comply.

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Litigation

6 Months Ended

Jun. 30, 2018

Disclosure Text Block [Abstract]

Litigation Matters Disclosure

Litigation

The Company is involved in various legal, environmental, tax and regulatory proceedings before various courts, regulatory commissions and governmental agencies regarding matters arising in the ordinary course of business. In many of these matters, the Company has excess casualty liability insurance that covers the various claims, actions and complaints. The Company regularly analyzes current information and, as necessary, makes provisions in its financial statements for probable liabilities for the eventual disposition of these matters. While the outcome of these matters cannot be predicted with certainty, based upon a review of the matters and applicable insurance coverage, the Company believes that none of these matters will have a material adverse effect on the financial position, results of operations or cash flows of the Company. The Company expenses legal costs, including expenses related to loss contingencies, as they are incurred.

See Notes D and H above and Notes C and K of the Notes to Financial Statements in the 2017 Form 10-K for discussion of the effects of government legislation and regulation on the Company.

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Employee Benefits

6 Months Ended

Jun. 30, 2018

Retirement Benefits, Description [Abstract]

Employee Benefits

Employee Benefits

The Company adopted ASU 2017-07, Compensation-Retirement Benefits, effective January 1, 2018. Upon adoption of the new standard, the service cost is included in "Operations and maintenance" in the Company's Statements of Operations. The expected return on plan assets is included in "Investment and interest income, net". The amortization of prior service benefit and amortization of gains are included in "Miscellaneous non-operating income". The amortization of prior service cost and amortization of losses are included in "Miscellaneous non-operating deductions". The interest cost component of net periodic benefit cost is included in "Other interest".

The provisions in ASU 2017-07 were applied retrospectively for the income statement presentation of the service cost component and the other components of net benefit costs. The Company elected to apply the practical expedient and used the amounts disclosed in its pension and other postretirement benefit plan note for the 2017 comparative period as the estimation basis for applying the retrospective presentation requirements. The Company reclassified $2.0 million to "Operations and maintenance" in the Company’s Statement of Operations for the three months ended June 30, 2017 by increasing (i) "Investment and interest income, net" by $5.2 million, (ii) "Miscellaneous non-operating income" by $2.9 million, (iii) "Miscellaneous non-operating deductions" by $2.1 million, and (iv) "Other interest" by $4.0 million. As a result of the reclassifications, "Operations and maintenance" increased to $2.5 million in service cost from the $0.5 million in net periodic benefit cost previously reported.

The Company reclassified $4.1 million to "Operations and maintenance" in the Company’s Statement of Operations for the six months ended June 30, 2017 by increasing (i) "Investment and interest income, net" by $10.5 million, (ii) "Miscellaneous non-operating income" by $5.7 million, (iii) "Miscellaneous non-operating deductions" by $4.2 million, and (iv) "Other interest" by $7.9 million. As a result of the reclassifications, "Operations and maintenance" increased to $5.4 million in service cost from the $1.3 million in net periodic benefit cost previously reported.

The Company reclassified $8.1 million to "Operations and maintenance" in the Company’s Statement of Operations for the twelve months ended June 30, 2017 by increasing (i) "Investment and interest income, net" by $20.9 million, (ii) "Miscellaneous non-operating income" by $10.8 million, (iii) "Miscellaneous non-operating deductions" by $7.8 million, and (iv) "Other interest" by $15.8 million. As a result of the reclassifications, "Operations and maintenance" increased to $10.9 million in service cost from the $2.8 million in net periodic benefit cost previously reported.

Retirement Plans

The net periodic benefit cost recognized for the three, six and twelve months endedJune 30, 2018 and 2017, is made up of the components listed below as determined using the projected unit credit actuarial cost method (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Components of net periodic benefit cost:
Service cost	$	2,757		$	1,989		$	5,515		$	4,259		$	9,774		$	8,450
Interest cost	3,222			3,282			6,445			6,530			12,974			13,039
Expected return on plan assets	(5,315		)	(4,787		)	(10,630		)	(9,595		)	(20,224		)	(19,049		)
Amortization of:
Net loss	2,100			2,138			4,200			4,227			8,427			7,791
Prior service benefit	(877		)	(875		)	(1,755		)	(1,753		)	(3,508		)	(3,504		)
Net periodic benefit cost	$	1,887		$	1,747		$	3,775		$	3,668		$	7,443		$	6,727

During the six months endedJune 30, 2018, the Company contributed $5.8 million of its projected $9.4 million2018 annual contribution to its retirement plans.

Other Postretirement Benefits

The net periodic benefit recognized for the three, six and twelve months endedJune 30, 2018 and 2017, is made up of the components listed below (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Components of net periodic benefit:
Service cost	$	700		$	530		$	1,400		$	1,118		$	2,518		$	2,457
Interest cost	565			684			1,130			1,362			2,491			2,784
Expected return on plan assets	(612		)	(483		)	(1,225		)	(953		)	(2,179		)	(1,868		)
Amortization of:
Prior service benefit	(1,537		)	(1,538		)	(3,075		)	(3,076		)	(6,150		)	(5,402		)
Net gain	(525		)	(444		)	(1,050		)	(839		)	(1,889		)	(1,883		)
Net periodic benefit	$	(1,409	)	$	(1,251	)	$	(2,820	)	$	(2,388	)	$	(5,209	)	$	(3,912	)

During the six months endedJune 30, 2018, the Company contributed $0.2 million of its projected $0.5 million2018 annual contribution to its other postretirement benefits plan.

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Financial Instruments And Investments (Notes)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Financial Instruments and Investments

Financial Instruments and Investments

The FASB guidance requires the Company to disclose estimated fair values for its financial instruments. The Company has determined that cash and temporary investments, investment in debt securities, accounts receivable, decommissioning trust funds, long-term debt, short-term borrowings under the Company's RCF, accounts payable and customer deposits meet the definition of financial instruments. The carrying amounts of cash and temporary investments, accounts receivable, accounts payable and customer deposits approximate fair value because of the short maturity of these items. Investments in debt securities and decommissioning trust funds are carried at estimated fair value.

Long-Term Debt and Short-Term Borrowings Under the RCF. The fair values of the Company's long-term debt and short-term borrowings under the RCF are based on estimated market prices for similar issues and are presented below (in thousands):

	June 30, 2018				December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Pollution Control Bonds	$	157,723	$	165,349	$	157,676	$	169,186
Senior Notes (1)	1,117,914		1,252,149		993,426		1,211,922
RGRT Senior Notes (1)(2)	109,517		111,650		44,886		47,070
RCF (2)	80,445		80,445		173,533		173,533
Total	$	1,465,599	$	1,609,593	$	1,369,521	$	1,601,711

_______________

(1) On June 28, 2018, the Company issued $125 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028 and guaranteed the issuance by the RGRT of $65 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025. See Note L, Long-Term Debt and Financing Obligations.

(2) Nuclear fuel financing, as of June 30, 2018 and December 31, 2017, is funded through $110 million and $45 million RGRT Senior Notes and $24.4 million and $88.5 million, respectively, under the RCF. As of June 30, 2018 and December 31, 2017, $56.0 million and $85.0 million, respectively, was outstanding under the RCF for working capital or general corporate purposes. The interest rate on the Company's borrowings under the RCF is reset throughout the quarter reflecting current market rates. Consequently, the carrying value approximates fair value.

Marketable Securities.The Company's marketable securities, included in decommissioning trust funds in the balance sheets, are reported at fair value which was $287.1 million and $286.9 million at June 30, 2018 and December 31, 2017, respectively. The investments in the Company's Palo Verde nuclear decommissioning trust funds ("NDT") are classified as available for sale debt securities, equity securities and cash and cash equivalents. These investments are recorded at their estimated fair value in accordance with FASB guidance for certain investments in debt and equity securities. On January 1, 2018, the Company adopted ASU 2016-01, Financial Instruments-Overall, which eliminates the requirements to classify investments in equity securities with readily determinable fair values as trading or available for sale and requires entities to recognize changes in fair value for these securities in net income as reported in the Statements of Operations. ASU 2016-01 requires a modified-retrospective approach and therefore, comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods.

The reported fair values include gross unrealized losses on securities classified as available for sale whose impairment the Company has deemed to be temporary. The tables below present the gross unrealized losses and the fair value of these securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	June 30, 2018
	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Description of Securities (1):
Federal Agency Mortgage Backed Securities	$	11,527	$	(169	)	$	10,180	$	(460	)	$	21,707	$	(629	)
U.S. Government Bonds	34,018		(1,178		)	17,625		(1,298		)	51,643		(2,476		)
Municipal Debt Obligations	5,442		(138		)	6,953		(600		)	12,395		(738		)
Corporate Debt Obligations	26,696		(950		)	3,140		(325		)	29,836		(1,275		)
Total	$	77,683	$	(2,435	)	$	37,898	$	(2,683	)	$	115,581	$	(5,118	)

_________________

(1) Includes 158 securities.

	December 31, 2017
	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Description of Securities (2):
Federal Agency Mortgage Backed Securities	$	4,700	$	(46	)	$	10,099	$	(165	)	$	14,799	$	(211	)
U.S. Government Bonds	28,866		(416		)	18,186		(969		)	47,052		(1,385		)
Municipal Debt Obligations	4,290		(73		)	9,736		(742		)	14,026		(815		)
Corporate Debt Obligations	10,685		(107		)	4,475		(331		)	15,160		(438		)
Total Debt Securities	48,541		(642		)	42,496		(2,207		)	91,037		(2,849		)
Domestic Equity Securities	962		(210		)	—		—			962		(210		)
Total	$	49,503	$	(852	)	$	42,496	$	(2,207	)	$	91,999	$	(3,059	)

_________________

(2) Includes 146 securities.

The Company monitors the length of time specific securities trade below their cost basis along with the amount and percentage of the unrealized loss in determining if a decline in fair value below recorded cost of debt securities classified as available for sale is considered to be other than temporary. The Company recognizes impairment losses on certain of its available for sale debt securities deemed to be other than temporary. In accordance with the FASB guidance, these impairment losses are recognized in net income, and a lower cost basis is established for these securities. In addition, the Company will research the future prospects of individual securities as necessary. The Company does not anticipate expending monies held in trust before 2044 or a later period when decommissioning of Palo Verde begins.

For the three, six and twelve months ended June 30, 2018 and 2017, the Company recognized other than temporary impairment losses on its available-for-sale securities as follows (in thousands):

	Three Months Ended				Six Months Ended				Twelve Months Ended
	June 30,				June 30,				June 30,
	2018		2017		2018		2017		2018		2017
Unrealized holding losses included in pre-tax income	$	—	$	—	$	—	$	—	$	—	$	(196	)

Investments categorized as available for sale securities also include gross unrealized gains which have not been recognized in the Company's net income. The table below presents the unrecognized gross unrealized gains and the fair value of these securities, aggregated by investment category (in thousands): 

	June 30, 2018				December 31, 2017
	Fair Value		Unrealized Gains		Fair Value		Unrealized Gains
Description of Securities:
Federal Agency Mortgage Backed Securities	$	2,758	$	96	$	5,933	$	203
U.S. Government Bonds	1,890		88		11,129		256
Municipal Debt Obligations	1,232		84		2,558		109
Corporate Debt Obligations	7,666		339		19,514		1,067
Total Debt Securities	13,546		607		39,134		1,635
Domestic Equity Securities	—		—		120,065		45,587
International Equity Securities	—		—		28,804		5,908
Cash and Cash Equivalents	—		—		6,864		—
Total	$	13,546	$	607	$	194,867	$	53,130

The Company's marketable securities include investments in mortgage backed securities, municipal, corporate and federal debt obligations. The contractual year for maturity of these available-for-sale debt securities as of June 30, 2018, is as follows (in thousands):

	Total		2018		2019 through 2022		2023 through 2027		2028 and Beyond
Federal Agency Mortgage Backed Securities	$	24,465	$	—	$	15	$	245	$	24,205
U.S. Government Bonds	53,533		1,886		28,137		10,872		12,638
Municipal Debt Obligations	13,627		121		5,492		5,789		2,225
Corporate Debt Obligations	37,502		—		17,303		8,471		11,728

The Company's available for sale securities in the NDT are sold from time to time and the Company uses the specific identification basis to determine the amount to reclassify from AOCI into net income. The proceeds from the sale of these securities during the three, six and twelve months ended June 30, 2018 and 2017, and the related effects on pre-tax income are as follows (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Proceeds from sales or maturities of available-for-sale securities	$	2,608		$	36,476		$	14,365		$	62,531		$	48,871		$	113,087
Gross realized gains included in pre-tax income	$	—		$	5,322		$	9		$	7,909		$	3,873		$	12,880
Gross realized losses included in pre-tax income	(147		)	(156		)	(674		)	(552		)	(1,269		)	(1,185		)
Gross unrealized losses included in pre-tax income	—			—			—			—			—			(196		)
Net gains (losses) included in pre-tax income	$	(147	)	$	5,166		$	(665	)	$	7,357		$	2,604		$	11,499

Upon the adoption of ASU 2016-01, Financial Instruments-Overall, on January 1, 2018, the Company records, on a modified-retrospective basis, changes in fair market value for equity securities held in the NDT in the Statements of Operations. The unrealized gains and losses recognized during the three and six months ended, June 30, 2018 and related effects on pre-tax income are as follows (in thousands):

	Three Months Ended		Six Months Ended
	June 30, 2018
Net gains and (losses) recognized on equity securities	$	3,249	$	1,258
Less: Net gains and (losses) recognized on equity securities sold	2,266		4,056
Unrealized gains and (losses) recognized on equity securities still held at reporting date	$	983	$	(2,798	)

Fair Value Measurements. The FASB guidance requires the Company to provide expanded quantitative disclosures for financial assets and liabilities recorded on the balance sheet at fair value. Financial assets carried at fair value include the Company's decommissioning trust investments and investments in debt securities which are included in deferred charges and other assets on the Balance Sheets. The Company has no liabilities that are measured at fair value on a recurring basis. The FASB guidance establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels as follows:

• Level 1 – Observable inputs that reflect quoted market prices for identical assets and liabilities in active markets. Financial assets utilizing Level 1 inputs include the NDT investments in active exchange-traded equity securities, mutual funds and U.S. Treasury securities that are in a highly liquid and active market. The Institutional Funds are valued using the Net Asset Value ("NAV") provided by the administrator of the fund. The NAV price is quoted on a restrictive market although the underlying investments are traded on active markets. The NAV used for determining the fair value of the Institutional Funds-International Equity investments have readily determinable fair values. Accordingly, such fund values are categorized as Level 1.

• Level 2 – Inputs other than quoted market prices included in Level 1 that are observable for the asset or liability either directly or indirectly. Financial assets utilizing Level 2 inputs include the NDT investments in fixed income securities. The fair value of these financial instruments is based on evaluated prices that reflect observable market information, such as actual trade information of similar securities, adjusted for observable differences.

• Level 3 – Unobservable inputs using data that is not corroborated by market data and primarily based on internal Company analysis using models and various other analysis. Financial assets utilizing Level 3 inputs are the Company's investment in debt securities.

The securities in the NDT are valued using prices and other relevant information generated by market transactions involving identical or comparable securities. The FASB guidance identifies this valuation technique as the "market approach" with observable inputs. The Company analyzes available-for-sale securities to determine if losses are other than temporary.

The fair value of the NDT and investments in debt securities at June 30, 2018 and December 31, 2017, and the level within the three levels of the fair value hierarchy defined by the FASB guidance are presented in the table below (in thousands):

Description of Securities	Fair Value as of June 30, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Trading Securities:
Investments in Debt Securities	$	1,697	$	—	$	—	$	1,697
Equity Securities:
Domestic	$	123,756	$	123,756	$	—	$	—
International	27,868		27,868		—		—
Total Equity Securities	151,624		151,624		—		—
Available for Sale Debt Securities:
Federal Agency Mortgage Backed Securities	24,465		—		24,465		—
U.S. Government Bonds	53,533		53,533		—		—
Municipal Debt Obligations	13,627		—		13,627		—
Corporate Debt Obligations	37,502		—		37,502		—
Total Available for Sale Debt Securities	129,127		53,533		75,594		—
Cash and Cash Equivalents	6,375		6,375		—		—
Total	$	287,126	$	211,532	$	75,594	$	—

Description of Securities	Fair Value as of December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Trading Securities:
Investments in Debt Securities	$	1,735	$	—	$	—	$	1,735
Available for Sale:
Federal Agency Mortgage Backed Securities	$	20,732	$	—	$	20,732	$	—
U.S. Government Bonds	58,181		58,181		—		—
Municipal Debt Obligations	16,584		—		16,584		—
Corporate Debt Obligations	34,674		—		34,674		—
Subtotal, Debt Securities	130,171		58,181		71,990		—
Domestic	121,027		121,027		—		—
International	28,804		28,804		—		—
Subtotal, Equity Securities	149,831		149,831		—		—
Cash and Cash Equivalents	6,864		6,864		—		—
Total	$	286,866	$	214,876	$	71,990	$	—

There were no transfers in or out of Level 1 and Level 2 fair value measurements categories due to changes in observable inputs during the three, six and twelve months ended June 30, 2018 and 2017. There were no purchases, sales, issuances and settlements related to the assets in the Level 3 fair value measurement category during the three, six and twelve months endedJune 30, 2018 and 2017.

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Long-Term Debt and Financing Obligations (Notes)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Long-term Debt

Long-Term Debt and Financing Obligations

$125 Million Senior Notes. On June 28, 2018, the Company entered into a Note Purchase Agreement (the "Agreement") with several institutional purchasers under which the Company issued and sold $125 million aggregate principal amount of 4.22% Senior Notes due August 15, 2028 (the "Notes"). The net proceeds from the issuance of these senior notes were used to repay outstanding short-term borrowings under the RCF for working capital and general corporate purposes. The Company will pay interest on the Notes semi-annually on February 15 and August 15 of each year until maturity, beginning on February 15, 2019.

The Company may redeem the Notes, in whole or in part, at any time at a redemption price equal to 100% of the principal amount to be redeemed together with the interest on such principal amount accrued to the date of redemption, plus a make-whole amount based on the prevailing market interest rates.

$65 Million RGRT Senior Notes. On June 28, 2018, the RGRT, a Texas grantor trust through which the Company finances its portion of nuclear fuel for Palo Verde, and the Company entered into a Note Purchase Agreement (the "RGRT Agreement") with several institutional purchasers. Under the terms of the RGRT Agreement, the RGRT issued and sold $65 million aggregate principal amount of 4.07% Senior Notes due August 15, 2025 (the "RGRT Notes"). The net proceeds from the RGRT Notes were used to repay outstanding short-term borrowings under the RCF to finance nuclear fuel purchases. The Company guaranteed the payment of principal and interest on the RGRT Notes. RGRT’s assets, liabilities and operations are consolidated in the Company’s financial statements and the RGRT Notes are included as long-term debt on the balance sheet. The RGRT will pay interest on the RGRT Notes semi-annually on February 15 and August 15 of each year until maturity, beginning on February 15, 2019.

The RGRT may redeem the RGRT Notes, in whole or in part, at any time at a redemption price equal to 100% of the principal amount to be redeemed together with the interest on such principal amount accrued to the date of redemption, plus a make-whole amount based on the prevailing market interest rates.

The issuance sale of both the Notes and the RGRT Notes was made in reliance on a private placement exemption from the registration provisions of the Securities Act of 1933, as amended.

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Principles Of Preparation (Policy)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Reclassification, Policy

Reclassification. Certain amounts in the financial statements for 2017 have been reclassified to conform with the 2018 presentation. The Company implemented Accounting Standards Update ("ASU") 2017-07, Compensation - Retirement Benefits, and ASU 2016-15, Statement of Cash Flows, in the first quarter of 2018, retrospective to all periods presented in the Company's financial statements. See "New Accounting Standards Adopted" below for further details.

Use of Estimates, Policy

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company evaluates its estimates on an on-going basis, including those related to depreciation, unbilled revenue, income taxes, fuel costs, pension and other post-retirement obligations and asset retirement obligations ("AROs"). Actual results could differ from those estimates.

Revenue Recognition, Policy

Revenues. The Company recognizes revenue associated with contracts with customers when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. Unbilled revenues are recorded for estimated amounts of energy delivered in the period following the customer's last billing cycle to the end of the reporting period. Unbilled revenues are estimated based on monthly generation volumes and by applying an average revenue/kilowatt-hour ("kWh") to the number of estimated kWhs delivered but not billed. Accounts receivable included accrued unbilled revenues of $38.3 million at June 30, 2018 and $22.2 million at December 31, 2017. The Company presents revenues net of sales taxes in its statements of operations.

The Company recognizes revenue when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. The Company has elected the optional invoice practical expedient for Wholesale and Wheeling revenues, as the invoice amount will correspond directly to the value provided by the Company's performance to date.

Retail. Retail contracts represent the Company's primary revenue source. The Company has determined that retail electric service to residential, commercial and industrial, and public authority customers represents an implied daily contract with the customer. The contract is comprised of an obligation to supply and distribute electricity and related capacity. Revenue is recognized, over time, equal to the product of the applicable tariff rates, as approved by the Public Utility Commission of Texas (the "PUCT") and the New Mexico Public Regulation Commission, (the "NMPRC"), and the volume of the electricity delivered to the customer, or through the passage of time based upon providing the service of standing ready. Unbilled revenues are recognized at month end based on estimated monthly generation volumes and by applying an average revenue per kWh to the number of estimated kWhs delivered but not billed to customers, and recorded as a receivable for the period following the last billing cycle to the end of the reporting period. Retail customers receive a bill monthly, with payment due sixteen days after issuance.

Wholesale. Wholesale contracts primarily include forward power sales into markets outside the Company’s service territory when the Company has competitive generation capacity available, after meeting its regulated service obligations. Pricing is either fixed or based on an index rate with consideration potentially including variable components. Uncertainties regarding the variable consideration will be resolved when the transaction price is known at the point of delivering the energy. The obligation to deliver the electricity is satisfied over time as the customer receives and consumes the electricity. Wholesale customers are invoiced on the 10^th day of each month, with payment due by the 20^th day of the month. In the case of the sale of renewable energy certificates, the transaction price is allocated to the performance obligation to deliver the confirmed quantity of the certificates based on the stand alone selling price of each certificate. Revenue is recognized as control of the certificates is transferred to the customer. The customer is invoiced upon the completed transfer of the certificates, with payment due within ten business days.Wholesalealso includes an annual agreement between the Company and one of its wholesale customers, Rio Grande Electric Cooperative ("RGEC"), which involves the provision of full requirements electric service from the Company to RGEC. The rates for this service are recalculated annually and require Federal Energy Regulatory Commission ("FERC") approval.

Wheeling (transmission). Wheeling involves the Company providing point-to-point transmission service, which includes the receipt of capacity and energy at designated point(s) and the transfer of such capacity and energy to designated point(s) of delivery on either a firm or non-firm basis for periods of one year or less. The performance obligation to provide capacity and transmit energy is satisfied over time as the Company performs. Transmission customers are invoiced on a monthly basis, with payment due within twenty days of receipt of the invoice.

Depreciation, Depletion, and Amortization, Policy

Depreciation. The Company routinely evaluates the depreciable service lives, cost of removal and salvage values of its property, plant and equipment. Depreciation is provided on a straight-line basis over the estimated remaining lives of the assets (ranging in average from 5 to 48 years). When property subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its cost together with the cost of removal, less salvage is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation is removed from the balance sheet accounts and a gain or loss is recognized.

New Accounting Standards, Policy

New Accounting Standards Adopted

In March 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting, to simplify the accounting for share-based payment transactions, including the income tax consequences, classification of awards either as equity or liabilities, and classification on the statements of cash flows. The Company adopted the new standard effective January 1, 2017. The adoption of the new standard did not have a material impact on the Company’s financial condition, results of operations or cash flows. The cumulative effect of the adoption of the new standard was to increase net operating loss carryforward deferred tax assets and retained earnings by $0.2 million on January 1, 2017.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to provide a framework that replaces the existing revenue recognition guidance, and has since modified the standard with several ASUs. The standard provides that an entity should recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. On January 1, 2018, the Company adopted the new accounting standard using the modified retrospective method. There was no cumulative effect adjustment at the initial application of the new standard. In addition, comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company expects the ongoing impact of the new standard to be immaterial to net income. As required by the standard, revenues of $3.8 million related to reimbursed costs of energy efficiency programs approved by the Company's regulators are reported in year-to-date operating revenues from customers prospectively, as opposed to being offset with associated costs within operations and maintenance. Related expenses of an equal amount are reported in operations and maintenance expenses. See Note B, Revenues, for additional information.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Liabilities, to enhance the reporting model for financial instruments by addressing certain aspects of recognition, measurement, presentation and disclosure. The Company adopted the new standard effective January 1, 2018. The adoption of ASU 2016-01 eliminates the requirements to classify investments in equity securities with readily determinable fair values into trading or available for sale and requires entities to measure equity investments at fair value and recognize any changes in fair value in the Statements of Operations. ASU 2016-01 requires a modified-retrospective approach and therefore comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Upon adoption of the new standard, the Company recorded a cumulative effect adjustment, net of income taxes, to increase retained earnings by $41.0 million with an offset to accumulated other comprehensive income ("AOCI"). In addition, the Company recorded net losses of $2.8 million related to equity securities still held at June 30, 2018. In March 2018, the FASB issued ASU 2018-04, Investments - Debt Securities (Topic 320) and Regulated Operations (Topic 980), which provides clarification to ASU 2016-01.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments, to reduce diversity in practice in how certain cash receipts and cash payments are classified in the statement of cash flows. The Company adopted the new standard effective January 1, 2018. ASU 2016-15 was applied using a retrospective transition method to each period presented. Accordingly, the Company presented in the Statement of Cash Flows insurance proceeds received for equipment of $5.4 million and $1.7 million, respectively, for the six months ended June 30, 2018 and 2017 as cash inflows from investing activities.

In March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715) Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. ASU 2017-07 amends Accounting Standards Codification ("ASC") 715, Compensation - Retirement Benefits, to require companies to present the service cost component of net benefit cost in the income statement line items where compensation cost is reported. Companies will present all other components of net benefit cost separately from the line item(s) that includes the service cost and outside of any subtotal of operating income. In addition, only the service cost component will be eligible for capitalization in assets. The Company adopted the new standard effective January 1, 2018. The amendments in ASU 2017-07 were applied retrospectively for the income statement presentation of the service cost component and the other components of net benefit costs. The Company elected to apply the practical expedient and used the amounts disclosed in its pension and other postretirement benefit plan note for the 2017 comparative period as the estimation basis for applying the retrospective presentation requirements. See Note J, Employee Benefits, for additional information.

In March 2018, the FASB issued ASU 2018-05, Income Taxes (Topic 740) Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 ("SAB 118"), to add various SEC paragraphs for clarification due to the Federal Tax Cuts and Jobs Act of 2017 ("TCJA"). The Company adopted ASU 2018-05 upon issuance and implemented SAB 118 in December of 2017 in conjunction with the enactment of the TCJA.

New Accounting Standards to be Adopted in the Future

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requiring qualitative and quantitative disclosures on leasing agreements. ASU 2016-02 maintains a distinction between finance leases and operating leases similar to the distinction under previous lease guidance for capital leases and operating leases. The impact of leases reported in the Company's operating results and statement of cash flows is expected to be similar to previous GAAP. ASU 2016-02 requires the recognition in the statement of financial position, by the lessee, of a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. How leases are recorded in regard to financial position represents a significant change from previous GAAP guidance. The lessee is permitted to make an accounting policy election to not recognize lease assets and lease liabilities for short-term leases. Implementation of the standard will be required for reporting periods beginning after December 15, 2018. Adoption of the new lease accounting standard will require the Company to apply the new standard to the earliest period using a modified retrospective approach. The Company is currently in the process of evaluating the impact of the new standard, which includes continuing to monitor activities of the FASB, including the impact of ASU 2018-01, Land Easement Practical expedient for Transition to Topic 842 and ASU 2018-11, Targeted Improvements. ASU 2018-11 allows entities to adopt the standard with a cumulative effect adjustment as of the beginning of the adoption year, while maintaining prior year comparative financial information and disclosures as reported. ASU 2018-01 provides an optional practical expedient to not evaluate existing or expired land easements under Topic 842, if those land easements were not previously accounted for as leases under ASC Topic 840. The Company currently anticipates that it will apply the practical expedient under ASU 2018-01 to its existing or expired land easements as part of its transition to Topic 842. The Company's evaluation process also includes evaluating the impact, if any, on changes to business processes, systems and controls to support recognition and disclosure under the new guidance; however, at this time the Company is unable to determine the impact this standard will have on the financial statements and related disclosures.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). ASU 2016-13 changes how companies measure and recognize credit impairment for many financial assets. The new current expected credit loss model will require companies to immediately recognize an estimate of credit losses expected to occur over the remaining life of the financial assets that are in the scope of the standard. The ASU also makes targeted amendments to the current impairment model for available-for-sale debt securities. ASU 2016-13 will be required for reporting periods beginning after December 15, 2019. ASU 2016-13 will be applied in a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is implemented. The Company is currently assessing the future impact of ASU 2016-13.

In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220), as a result of concerns raised due to the TCJA. More specifically, because the remeasurement of deferred taxes due to the change in the federal corporate income tax rate is required to be included in income from continuing operations, the tax effects of items within AOCI (referred to as stranded tax effects) do not reflect the appropriate tax rate. ASU 2018-02 generally allows companies to reclassify stranded taxes from AOCI to retained earnings. The amount of the adjustment would be the difference between the historical federal corporate income tax rate of 35% and the newly enacted 21% federal corporate income tax rate. The provisions of ASU 2018-02 are effective for fiscal years and interim periods within that reporting period beginning after December 15, 2018. Early adoption is permitted, including adoption in any interim periods for reporting periods for which financial statements have not been issued. The Company is currently evaluating the impact of ASU 2018-02 and its impact on regulated utilities. At June 30, 2018, stranded taxes in AOCI are approximately $7.2 million.

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Revenue Recognition (Policies)

6 Months Ended

Jun. 30, 2018

Revenue Recognition [Abstract]

Revenue Recognition, Policy

Revenues. The Company recognizes revenue associated with contracts with customers when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. Unbilled revenues are recorded for estimated amounts of energy delivered in the period following the customer's last billing cycle to the end of the reporting period. Unbilled revenues are estimated based on monthly generation volumes and by applying an average revenue/kilowatt-hour ("kWh") to the number of estimated kWhs delivered but not billed. Accounts receivable included accrued unbilled revenues of $38.3 million at June 30, 2018 and $22.2 million at December 31, 2017. The Company presents revenues net of sales taxes in its statements of operations.

The Company recognizes revenue when performance obligations under the terms of the contract with the customer are satisfied. Revenue is measured as the amount of consideration the Company receives in exchange for transferring goods or providing services to the customer. Taxes collected concurrently with revenue producing activities are excluded from revenue. The Company has elected the optional invoice practical expedient for Wholesale and Wheeling revenues, as the invoice amount will correspond directly to the value provided by the Company's performance to date.

Retail. Retail contracts represent the Company's primary revenue source. The Company has determined that retail electric service to residential, commercial and industrial, and public authority customers represents an implied daily contract with the customer. The contract is comprised of an obligation to supply and distribute electricity and related capacity. Revenue is recognized, over time, equal to the product of the applicable tariff rates, as approved by the Public Utility Commission of Texas (the "PUCT") and the New Mexico Public Regulation Commission, (the "NMPRC"), and the volume of the electricity delivered to the customer, or through the passage of time based upon providing the service of standing ready. Unbilled revenues are recognized at month end based on estimated monthly generation volumes and by applying an average revenue per kWh to the number of estimated kWhs delivered but not billed to customers, and recorded as a receivable for the period following the last billing cycle to the end of the reporting period. Retail customers receive a bill monthly, with payment due sixteen days after issuance.

Wholesale. Wholesale contracts primarily include forward power sales into markets outside the Company’s service territory when the Company has competitive generation capacity available, after meeting its regulated service obligations. Pricing is either fixed or based on an index rate with consideration potentially including variable components. Uncertainties regarding the variable consideration will be resolved when the transaction price is known at the point of delivering the energy. The obligation to deliver the electricity is satisfied over time as the customer receives and consumes the electricity. Wholesale customers are invoiced on the 10^th day of each month, with payment due by the 20^th day of the month. In the case of the sale of renewable energy certificates, the transaction price is allocated to the performance obligation to deliver the confirmed quantity of the certificates based on the stand alone selling price of each certificate. Revenue is recognized as control of the certificates is transferred to the customer. The customer is invoiced upon the completed transfer of the certificates, with payment due within ten business days.Wholesalealso includes an annual agreement between the Company and one of its wholesale customers, Rio Grande Electric Cooperative ("RGEC"), which involves the provision of full requirements electric service from the Company to RGEC. The rates for this service are recalculated annually and require Federal Energy Regulatory Commission ("FERC") approval.

Wheeling (transmission). Wheeling involves the Company providing point-to-point transmission service, which includes the receipt of capacity and energy at designated point(s) and the transfer of such capacity and energy to designated point(s) of delivery on either a firm or non-firm basis for periods of one year or less. The performance obligation to provide capacity and transmit energy is satisfied over time as the Company performs. Transmission customers are invoiced on a monthly basis, with payment due within twenty days of receipt of the invoice.

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Revenues Alternative Revenue Programs (Policies)

6 Months Ended

Jun. 30, 2018

Revenue Recognition [Abstract]

Revenue Recognition for Alternative Revenue Programs, Policy

alternative revenue program revenue relating to the Company’s potential bonus awards from the PUCT and the NMPRC mandated energy efficiency programs. Both the PUCT and the NMPRC allow for the potential to earn an incentive bonus if the Company achieves its approved energy efficiency goals under the applicable programs. The Company recognizes revenue related to the energy efficiency program incentives at the point in time that the amount is objectively determinable generally based upon an approved order from the regulator, is probable of recovery, and if it is expected to be collected within 24 months.

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Principles Of Preparation (Tables)

6 Months Ended

Jun. 30, 2018

Supplemental Cash Flow Information [Abstract]

Cash Flow, Supplemental Disclosures

Supplemental Cash Flow Disclosures (in thousands)
		Six Months Ended
		June 30,
		2018			2017
Cash paid (received) for:
	Interest on long-term debt and borrowings under the revolving credit facility	$	35,706		$	35,304
	Income tax paid, net	1,636			2,251
Non-cash investing and financing activities:
	Changes in accrued plant additions	(906		)	(9,105		)
	Grants of restricted shares of common stock	1,030			1,171
	Issuance of performance shares	1,499			932

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Revenues (Table)

6 Months Ended

Jun. 30, 2018

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

The following table disaggregates revenue from contracts with customers, for the three, six and twelve months ended June 30, 2018 (in thousands):

	June 30, 2018
	Three Months Ended		Six Months Ended		Twelve Months Ended
Retail	$	220,980	$	367,607	$	812,522
Wholesale	10,957		35,101		71,610
Wheeling (transmission)	4,147		8,433		17,732
Total revenues from contracts with customers	236,084		411,141		901,864
Other	712		1,368		4,264
Total operating revenues	$	236,796	$	412,509	$	906,128

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Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2018

Accumulated Other Comprehensive Income (Loss) [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss)

Upon adoption of ASU 2016-01, Financial Instruments-Overall, the Company recorded, on January 1, 2018, a cumulative effect adjustment, net of income taxes, to increase retained earnings by $41.0 million with an offset to AOCI. Changes in Accumulated Other Comprehensive Income (Loss) (net of tax) by component are presented below (in thousands):
		Three Months Ended June 30, 2018												Three Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Debt Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(18,475	)	$	(2,593	)	$	(11,253	)	$	(32,321	)	$	(24,457	)	$	32,872		$	(11,599	)	$	(3,184	)
	Other comprehensive income before reclassifications	—			(1,000		)	—			(1,000		)	—			3,558			—			3,558
	Amounts reclassified from accumulated other comprehensive income (loss)	(649		)	115			109			(425		)	(458		)	(4,134		)	85			(4,507		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)
		Six Months Ended June 30, 2018												Six Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(17,790	)	$	40,190		$	(11,342	)	$	11,058		$	(23,928	)	$	28,463		$	(11,651	)	$	(7,116	)
	Cumulative effect adjustment	—			(41,028		)	—			(41,028		)	—			—			—			—
	Other comprehensive income before reclassifications	—			(3,159		)	—			(3,159		)	—			9,723			—			9,723
	Amounts reclassified from accumulated other comprehensive income (loss)	(1,334		)	519			198			(617		)	(987		)	(5,890		)	137			(6,740		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)

		Twelve Months Ended June 30, 2018												Twelve Months Ended June 30, 2017
		Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)			Unrecognized Pension and Post-retirement Benefit Costs			Net Unrealized Gains (Losses) on Marketable Securities			Net Losses on Cash Flow Hedges			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period as previously reported		$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)	$	(30,532	)	$	28,925		$	(11,693	)	$	(13,300	)
	Cumulative effect adjustment	—			(41,028		)	—			(41,028		)	—			—			—			—
	Other comprehensive income before reclassifications	7,951			7,369			—			15,320			7,363			12,661			—			20,024
	Amounts reclassified from accumulated other comprehensive income (loss)	(2,160		)	(2,115		)	370			(3,905		)	(1,746		)	(9,290		)	179			(10,857		)
Balance at end of period		$	(19,124	)	$	(3,478	)	$	(11,144	)	$	(33,746	)	$	(24,915	)	$	32,296		$	(11,514	)	$	(4,133	)

Reclassification out of Accumulated Other Comprehensive Income

Amounts reclassified from Accumulated Other Comprehensive Income (Loss) for the three, six and twelve months ended June 30, 2018 and 2017 are as follows (in thousands):

Details about Accumulated Other Comprehensive Income (Loss) Components		Three Months Ended June 30,						Six Months Ended June 30,						Twelve Months Ended June 30,						Affected Line Item in the Statements of Operations
		2018			2017			2018			2017			2018			2017
Amortization of pension and post-retirement benefit costs:
	Prior service benefit	$	2,414		$	2,413		$	4,830		$	4,829		$	9,658		$	8,906		Miscellaneous non-operating income
	Net loss	(1,575		)	(1,694		)	(3,150		)	(3,388		)	(6,538		)	(5,908		)	Miscellaneous non-operating deductions
		839			719			1,680			1,441			3,120			2,998			Income (loss) before income taxes
	Income tax effect	(190		)	(261		)	(346		)	(454		)	(960		)	(1,252		)	Income tax (benefit) expense
		649			458			1,334			987			2,160			1,746			Net income (loss)
Marketable securities:
	Net realized gain (loss) on sale of securities	(147		)	5,166			(665		)	7,357			2,604			11,499			Investment and interest income, net
		(147		)	5,166			(665		)	7,357			2,604			11,499			Income (loss) before income taxes
	Income tax effect	32			(1,032		)	146			(1,467		)	(489		)	(2,209		)	Income tax (benefit) expense
		(115		)	4,134			(519		)	5,890			2,115			9,290			Net income (loss)
Loss on cash flow hedge:
	Amortization of loss	(140		)	(132		)	(279		)	(262		)	(549		)	(515		)	Interest on long-term debt and revolving credit facility
		(140		)	(132		)	(279		)	(262		)	(549		)	(515		)	Income (loss) before income taxes
	Income tax effect	31			47			81			125			179			336			Income tax (benefit) expense
		(109		)	(85		)	(198		)	(137		)	(370		)	(179		)	Net income (loss)
	Total reclassifications	$	425		$	4,507		$	617		$	6,740		$	3,905		$	10,857

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Palo Verde Palo Verde (Tables)

6 Months Ended

Jun. 30, 2018

Palo Verde Generating Station

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Jointly Owned Utility Plants

Palo Verde Operations and Maintenance Expense. Included in "Operations and maintenance" in the Company's Statements of Operations are expenses associated with Palo Verde as follows (in thousands):

	2018		2017
Three months ended June 30,	$	24,977	$	25,931
Six months ended June 30,	47,152		47,539
Twelve months ended June 30,	98,977		98,062

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Common Stock (Tables)

6 Months Ended

Jun. 30, 2018

Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Basic and Diluted Earnings Per Share. The basic and diluted earnings per share are presented below (in thousands except for share data):
	Three Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,517,713			40,409,030
Dilutive effect of unvested performance awards	130,086			116,555
Diluted number of common shares outstanding	40,647,799			40,525,585
Basic net income per common share:
Net income	$	33,295		$	36,066
Income allocated to participating restricted stock	(124		)	(142		)
Net income available to common shareholders	$	33,171		$	35,924
Diluted net income per common share:
Net income	$	33,295		$	36,066
Income reallocated to participating restricted stock	(124		)	(142		)
Net income available to common shareholders	$	33,171		$	35,924
Basic net income per common share:
Distributed earnings	$	0.36		$	0.335
Undistributed earnings	0.46			0.555
Basic net income per common share	$	0.82		$	0.890
Diluted net income per common share:
Distributed earnings	$	0.36		$	0.335
Undistributed earnings	0.46			0.555
Diluted net income per common share	$	0.82		$	0.890

	Six Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,504,526			40,398,192
Dilutive effect of unvested performance awards	113,519			101,152
Diluted number of common shares outstanding	40,618,045			40,499,344
Basic net income per common share:
Net income	$	26,329		$	32,077
Income allocated to participating restricted stock	(98		)	(119		)
Net income available to common shareholders	$	26,231		$	31,958
Diluted net income per common share:
Net income	$	26,329		$	32,077
Income reallocated to participating restricted stock	(98		)	(119		)
Net income available to common shareholders	$	26,231		$	31,958
Basic net income per common share:
Distributed earnings	$	0.695		$	0.645
Undistributed earnings (losses)	(0.045		)	0.145
Basic net income per common share	$	0.650		$	0.790
Diluted net income per common share:
Distributed earnings	$	0.695		$	0.645
Undistributed earnings (losses)	(0.045		)	0.145
Diluted net income per common share	$	0.650		$	0.790

	Twelve Months Ended June 30,
	2018			2017
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	40,467,231			40,381,776
Dilutive effect of unvested performance awards	126,818			85,219
Diluted number of common shares outstanding	40,594,049			40,466,995
Basic net income per common share:
Net income	$	92,513		$	112,369
Income allocated to participating restricted stock	(336		)	(423		)
Net income available to common shareholders	$	92,177		$	111,946
Diluted net income per common share:
Net income	$	92,513		$	112,369
Income reallocated to participating restricted stock	(336		)	(423		)
Net income available to common shareholders	$	92,177		$	111,946
Basic net income per common share:
Distributed earnings	$	1.365		$	1.265
Undistributed earnings	0.915			1.505
Basic net income per common share	$	2.280		$	2.770
Diluted net income per common share:
Distributed earnings	$	1.365		$	1.265
Undistributed earnings	0.905			1.505
Diluted net income per common share	$	2.270		$	2.770

Schedule of Antidilutive Securities Excluded From Computation Of Earnings Per Share

The number of restricted stock awards and performance shares at 100% performance level excluded from the calculation of the diluted number of common shares outstanding because their effect was antidilutive is presented below:
	Three Months Ended		Six Months Ended		Twelve Months Ended
	June 30,		June 30,		June 30,
	2018	2017	2018	2017	2018	2017
Restricted stock awards	55,368	58,792	63,793	68,409	65,432	62,352
Performance shares (a)	—	—	22,989	—	11,494	6,906

________________________

(a) Certain performance shares were excluded from the computation of diluted earnings per share as no payouts would have been required based upon performance at the end of each corresponding period.

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Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2018

Retirement Plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

The net periodic benefit cost recognized for the three, six and twelve months endedJune 30, 2018 and 2017, is made up of the components listed below as determined using the projected unit credit actuarial cost method (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Components of net periodic benefit cost:
Service cost	$	2,757		$	1,989		$	5,515		$	4,259		$	9,774		$	8,450
Interest cost	3,222			3,282			6,445			6,530			12,974			13,039
Expected return on plan assets	(5,315		)	(4,787		)	(10,630		)	(9,595		)	(20,224		)	(19,049		)
Amortization of:
Net loss	2,100			2,138			4,200			4,227			8,427			7,791
Prior service benefit	(877		)	(875		)	(1,755		)	(1,753		)	(3,508		)	(3,504		)
Net periodic benefit cost	$	1,887		$	1,747		$	3,775		$	3,668		$	7,443		$	6,727

Other Postretirement Benefit Plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

The net periodic benefit recognized for the three, six and twelve months endedJune 30, 2018 and 2017, is made up of the components listed below (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Components of net periodic benefit:
Service cost	$	700		$	530		$	1,400		$	1,118		$	2,518		$	2,457
Interest cost	565			684			1,130			1,362			2,491			2,784
Expected return on plan assets	(612		)	(483		)	(1,225		)	(953		)	(2,179		)	(1,868		)
Amortization of:
Prior service benefit	(1,537		)	(1,538		)	(3,075		)	(3,076		)	(6,150		)	(5,402		)
Net gain	(525		)	(444		)	(1,050		)	(839		)	(1,889		)	(1,883		)
Net periodic benefit	$	(1,409	)	$	(1,251	)	$	(2,820	)	$	(2,388	)	$	(5,209	)	$	(3,912	)

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Financial Instruments And Investments (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Values Of Long-Term Debt And Short-Term Borrowings Under the RCF

The fair values of the Company's long-term debt and short-term borrowings under the RCF are based on estimated market prices for similar issues and are presented below (in thousands):

	June 30, 2018				December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Pollution Control Bonds	$	157,723	$	165,349	$	157,676	$	169,186
Senior Notes (1)	1,117,914		1,252,149		993,426		1,211,922
RGRT Senior Notes (1)(2)	109,517		111,650		44,886		47,070
RCF (2)	80,445		80,445		173,533		173,533
Total	$	1,465,599	$	1,609,593	$	1,369,521	$	1,601,711

_______________

(1) On June 28, 2018, the Company issued $125 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028 and guaranteed the issuance by the RGRT of $65 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025. See Note L, Long-Term Debt and Financing Obligations.

(2) Nuclear fuel financing, as of June 30, 2018 and December 31, 2017, is funded through $110 million and $45 million RGRT Senior Notes and $24.4 million and $88.5 million, respectively, under the RCF. As of June 30, 2018 and December 31, 2017, $56.0 million and $85.0 million, respectively, was outstanding under the RCF for working capital or general corporate purposes. The interest rate on the Company's borrowings under the RCF is reset throughout the quarter reflecting current market rates. Consequently, the carrying value approximates fair value.

Unrecognized Gross Unrealized Gains (Losses) And the Fair Value

The tables below present the gross unrealized losses and the fair value of these securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	June 30, 2018
	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Description of Securities (1):
Federal Agency Mortgage Backed Securities	$	11,527	$	(169	)	$	10,180	$	(460	)	$	21,707	$	(629	)
U.S. Government Bonds	34,018		(1,178		)	17,625		(1,298		)	51,643		(2,476		)
Municipal Debt Obligations	5,442		(138		)	6,953		(600		)	12,395		(738		)
Corporate Debt Obligations	26,696		(950		)	3,140		(325		)	29,836		(1,275		)
Total	$	77,683	$	(2,435	)	$	37,898	$	(2,683	)	$	115,581	$	(5,118	)

_________________

(1) Includes 158 securities.

	December 31, 2017
	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Description of Securities (2):
Federal Agency Mortgage Backed Securities	$	4,700	$	(46	)	$	10,099	$	(165	)	$	14,799	$	(211	)
U.S. Government Bonds	28,866		(416		)	18,186		(969		)	47,052		(1,385		)
Municipal Debt Obligations	4,290		(73		)	9,736		(742		)	14,026		(815		)
Corporate Debt Obligations	10,685		(107		)	4,475		(331		)	15,160		(438		)
Total Debt Securities	48,541		(642		)	42,496		(2,207		)	91,037		(2,849		)
Domestic Equity Securities	962		(210		)	—		—			962		(210		)
Total	$	49,503	$	(852	)	$	42,496	$	(2,207	)	$	91,999	$	(3,059	)

_________________

(2) Includes 146 securities.

Unrealized Holding Losses Included In Pre-Tax Income

For the three, six and twelve months ended June 30, 2018 and 2017, the Company recognized other than temporary impairment losses on its available-for-sale securities as follows (in thousands):

	Three Months Ended				Six Months Ended				Twelve Months Ended
	June 30,				June 30,				June 30,
	2018		2017		2018		2017		2018		2017
Unrealized holding losses included in pre-tax income	$	—	$	—	$	—	$	—	$	—	$	(196	)

Marketable Securities Fair Value and Unrecognized Gross Unrealized Gain

The table below presents the unrecognized gross unrealized gains and the fair value of these securities, aggregated by investment category (in thousands): 

	June 30, 2018				December 31, 2017
	Fair Value		Unrealized Gains		Fair Value		Unrealized Gains
Description of Securities:
Federal Agency Mortgage Backed Securities	$	2,758	$	96	$	5,933	$	203
U.S. Government Bonds	1,890		88		11,129		256
Municipal Debt Obligations	1,232		84		2,558		109
Corporate Debt Obligations	7,666		339		19,514		1,067
Total Debt Securities	13,546		607		39,134		1,635
Domestic Equity Securities	—		—		120,065		45,587
International Equity Securities	—		—		28,804		5,908
Cash and Cash Equivalents	—		—		6,864		—
Total	$	13,546	$	607	$	194,867	$	53,130

Contractual Year For Maturity Of Available-For-Sale Securities

The contractual year for maturity of these available-for-sale debt securities as of June 30, 2018, is as follows (in thousands):

	Total		2018		2019 through 2022		2023 through 2027		2028 and Beyond
Federal Agency Mortgage Backed Securities	$	24,465	$	—	$	15	$	245	$	24,205
U.S. Government Bonds	53,533		1,886		28,137		10,872		12,638
Municipal Debt Obligations	13,627		121		5,492		5,789		2,225
Corporate Debt Obligations	37,502		—		17,303		8,471		11,728

Sale of Securities And The Related Effects On Pre-Tax Income

The proceeds from the sale of these securities during the three, six and twelve months ended June 30, 2018 and 2017, and the related effects on pre-tax income are as follows (in thousands):

	Three Months Ended						Six Months Ended						Twelve Months Ended
	June 30,						June 30,						June 30,
	2018			2017			2018			2017			2018			2017
Proceeds from sales or maturities of available-for-sale securities	$	2,608		$	36,476		$	14,365		$	62,531		$	48,871		$	113,087
Gross realized gains included in pre-tax income	$	—		$	5,322		$	9		$	7,909		$	3,873		$	12,880
Gross realized losses included in pre-tax income	(147		)	(156		)	(674		)	(552		)	(1,269		)	(1,185		)
Gross unrealized losses included in pre-tax income	—			—			—			—			—			(196		)
Net gains (losses) included in pre-tax income	$	(147	)	$	5,166		$	(665	)	$	7,357		$	2,604		$	11,499

Unrealized Gain (Loss) on Investments

The unrealized gains and losses recognized during the three and six months ended, June 30, 2018 and related effects on pre-tax income are as follows (in thousands):

	Three Months Ended		Six Months Ended
	June 30, 2018
Net gains and (losses) recognized on equity securities	$	3,249	$	1,258
Less: Net gains and (losses) recognized on equity securities sold	2,266		4,056
Unrealized gains and (losses) recognized on equity securities still held at reporting date	$	983	$	(2,798	)

Fair Value, Measurement Inputs, Disclosure

The fair value of the NDT and investments in debt securities at June 30, 2018 and December 31, 2017, and the level within the three levels of the fair value hierarchy defined by the FASB guidance are presented in the table below (in thousands):

Description of Securities	Fair Value as of June 30, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Trading Securities:
Investments in Debt Securities	$	1,697	$	—	$	—	$	1,697
Equity Securities:
Domestic	$	123,756	$	123,756	$	—	$	—
International	27,868		27,868		—		—
Total Equity Securities	151,624		151,624		—		—
Available for Sale Debt Securities:
Federal Agency Mortgage Backed Securities	24,465		—		24,465		—
U.S. Government Bonds	53,533		53,533		—		—
Municipal Debt Obligations	13,627		—		13,627		—
Corporate Debt Obligations	37,502		—		37,502		—
Total Available for Sale Debt Securities	129,127		53,533		75,594		—
Cash and Cash Equivalents	6,375		6,375		—		—
Total	$	287,126	$	211,532	$	75,594	$	—

Description of Securities	Fair Value as of December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Trading Securities:
Investments in Debt Securities	$	1,735	$	—	$	—	$	1,735
Available for Sale:
Federal Agency Mortgage Backed Securities	$	20,732	$	—	$	20,732	$	—
U.S. Government Bonds	58,181		58,181		—		—
Municipal Debt Obligations	16,584		—		16,584		—
Corporate Debt Obligations	34,674		—		34,674		—
Subtotal, Debt Securities	130,171		58,181		71,990		—
Domestic	121,027		121,027		—		—
International	28,804		28,804		—		—
Subtotal, Equity Securities	149,831		149,831		—		—
Cash and Cash Equivalents	6,864		6,864		—		—
Total	$	286,866	$	214,876	$	71,990	$	—

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Principles Of Preparation (Accrued Unbilled Revenues) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Accrued unbilled revenues	$ 38.3	$ 22.2

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Principles Of Preparation (Depreciation) (Details)	6 Months Ended
	Jun. 30, 2018
Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	48 years

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Principles Of Preparation Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Jan. 01, 2018	Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from insurance settlement, investing activities			$ 5,351	$ 1,725
Federal statutory tax rate	21.00%	35.00%	21.00%	35.00%	35.00%
Decrease in accumulated other comprehensive income	$ (33,746)		$ (33,746)		$ 11,058
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in operating loss carryforward deferred tax assets							$ 200
Increase in retained earnings							$ 200
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of reimbursable expense			3,800
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in retained earnings						$ 41,000
Decrease in accumulated other comprehensive income						$ (41,000)
Accounting Standards Update 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from insurance settlement, investing activities			5,400	$ 1,700
Potential Impact of Adopting Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in accumulated other comprehensive income	$ (7,200)		(7,200)
Decommisioning Fund Investments | US Treasury and Government | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrealized loss on securities			$ 2,800

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Principles Of Preparation (Supplemental Cash Flow Disclosures) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Supplemental Cash Flow Information [Abstract]
Interest on long-term debt and borrowings under the revolving credit facility	$ 35,706	$ 35,304
Income tax paid, net	1,636	2,251
Changes in accrued plant additions	(906)	(9,105)
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued	1,030	1,171
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued	$ 1,499	$ 932

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Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 236,084		$ 411,141		$ 901,864
Other	712		1,368		4,264
Total operating revenues	236,796	$ 251,843	412,509	$ 423,178	906,128	$ 934,440
Retail
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	220,980		367,607		812,522
Wholesale
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	10,957		35,101		71,610
Transmission
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 4,147		$ 8,433		$ 17,732

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Revenues Narrative (Details)		6 Months Ended
	Apr. 01, 2018	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Surcharge Or Refund Period	1 year
Recovery period per ASC 980-605-25 | Maximum
Disaggregation of Revenue [Line Items]
Surcharge Or Refund Period		24 months
Retail
Disaggregation of Revenue [Line Items]
Customer Payment Terms		16 days
Wholesale
Disaggregation of Revenue [Line Items]
Number Of Customers		1
Wholesale | Maximum
Disaggregation of Revenue [Line Items]
Customer Payment Terms		10 days
Transmission | Maximum
Disaggregation of Revenue [Line Items]
Customer Payment Terms		20 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year

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Revenues Accounts Receivable (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2018
Revenue Recognition [Abstract]
Provision for Doubtful Accounts	$ 0.5	$ 1.0	$ 3.2

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Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Jan. 01, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), beginning balance			$ 11,058
Accumulated Other Comprehensive Income (Loss), ending balance	$ (33,746)		(33,746)		$ (33,746)
Accumulated Defined Benefit Plans Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							$ 0	$ 0
Accumulated Net Unrealized Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							(41,028)	0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							0	0
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							$ (41,028)	$ 0
Accumulated Defined Benefit Plans Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), beginning balance	(18,475)	$ (24,457)	(17,790)	$ (23,928)	(24,915)	$ (30,532)
Other Comprehensive Income (Loss) before Reclassifications	0	0	0	0	7,951	7,363
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(649)	(458)	(1,334)	(987)	(2,160)	(1,746)
Accumulated Other Comprehensive Income (Loss), ending balance	(19,124)	(24,915)	(19,124)	(24,915)	(19,124)	(24,915)
Accumulated Net Unrealized Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), beginning balance	(2,593)	32,872	40,190	28,463	32,296	28,925
Other Comprehensive Income (Loss) before Reclassifications	(1,000)	3,558	(3,159)	9,723	7,369	12,661
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	115	(4,134)	519	(5,890)	(2,115)	(9,290)
Accumulated Other Comprehensive Income (Loss), ending balance	(3,478)	32,296	(3,478)	32,296	(3,478)	32,296
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), beginning balance	(11,253)	(11,599)	(11,342)	(11,651)	(11,514)	(11,693)
Other Comprehensive Income (Loss) before Reclassifications	0	0	0	0	0	0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	109	85	198	137	370	179
Accumulated Other Comprehensive Income (Loss), ending balance	(11,144)	(11,514)	(11,144)	(11,514)	(11,144)	(11,514)
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), beginning balance	(32,321)	(3,184)	11,058	(7,116)	(4,133)	(13,300)
Other Comprehensive Income (Loss) before Reclassifications	(1,000)	3,558	(3,159)	9,723	15,320	20,024
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(425)	(4,507)	(617)	(6,740)	(3,905)	(10,857)
Accumulated Other Comprehensive Income (Loss), ending balance	$ (33,746)	$ (4,133)	$ (33,746)	$ (4,133)	$ (33,746)	$ (4,133)

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Accumulated Other Comprehensive Income Amounts Reclassified (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income (loss) before income taxes	$ 44,060	$ 55,846	$ 34,042	$ 49,569	$ 133,738	$ 175,490
Income tax expense (benefit)	(10,765)	(19,780)	(7,713)	(17,492)	(41,225)	(63,121)
Net income	33,295	36,066	26,329	32,077	92,513	112,369
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	2,414	2,413	4,830	4,829	9,658	8,906
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(1,575)	(1,694)	(3,150)	(3,388)	(6,538)	(5,908)
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	839	719	1,680	1,441	3,120	2,998
Reclassification from AOCI, Current Period, Tax	(190)	(261)	(346)	(454)	(960)	(1,252)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	649	458	1,334	987	2,160	1,746
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(115)	4,134	(519)	5,890	2,115	9,290
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(109)	(85)	(198)	(137)	(370)	(179)
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	425	4,507	617	6,740	3,905	10,857
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized gain (loss) on sale of securities	(147)	5,166	(665)	7,357	2,604	11,499
Income (loss) before income taxes	(147)	5,166	(665)	7,357	2,604	11,499
Income tax expense (benefit)	32	(1,032)	146	(1,467)	(489)	(2,209)
Net income	(115)	4,134	(519)	5,890	2,115	9,290
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income (loss) before income taxes	(140)	(132)	(279)	(262)	(549)	(515)
Income tax expense (benefit)	31	47	81	125	179	336
Net income	(109)	(85)	(198)	(137)	(370)	(179)
Interest Rate Contract | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest on long-term debt and revolving credit facility	$ (140)	$ (132)	$ (279)	$ (262)	$ (549)	$ (515)

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Regulation (Narrative) (Details)																					3 Months Ended				6 Months Ended		12 Months Ended
	Jul. 02, 2018 USD ($)	Jun. 28, 2018 USD ($)	May 01, 2018 USD ($)	Apr. 25, 2018 USD ($)	Apr. 13, 2018	Apr. 01, 2018	Mar. 15, 2018	Mar. 01, 2018 USD ($)	Feb. 15, 2018 USD ($)	Jan. 01, 2018	Dec. 18, 2017 USD ($)	Nov. 01, 2017	Aug. 01, 2017	Jun. 29, 2017	Feb. 22, 2017 USD ($)	Jan. 10, 2017	Sep. 27, 2016 USD ($)	Aug. 25, 2016	Jul. 01, 2016 USD ($)	Jun. 08, 2016 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jun. 30, 2018 USD ($) MW	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Apr. 24, 2018 MW	Mar. 20, 2018 MW	Oct. 31, 2017 USD ($)	Oct. 04, 2017 USD ($)	Oct. 07, 2015 USD ($)
Public Utilities, Requested Rate Decrease, Amount								$ 22,700,000
Surcharge Or Refund Period						1 year
Nuclear Decommissioning Funding, Annual Recovery																									$ 47,896,000	$ 65,960,000
Over-collection of fuel revenues, regulatory liability																					$ 8,174,000				8,174,000		$ 6,225,000
Under-collection of fuel revenues, regulatory asset																					$ 965,000				$ 965,000		$ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent																					21.00%		35.00%		21.00%	35.00%	35.00%
PUCT
Over-collection of fuel revenues, regulatory liability																					$ 8,200,000				$ 8,200,000
Reconcilable Fuel Expense																									$ 304,300,000
Fuel Reconciliation Period																									27 months
Fuel Over And Under Materiality Threshold Percentage																					4.00%				4.00%
PUCT | Community Solar At Montana Power Station
Electric Capacity | MW																									3
Number of customers subscribed																					1,500				1,500
Property, Plant and Equipment, Operational Date																									May 31, 2017
PUCT | Community Solar at Newman
Electric capacity, requested | MW																														2
PUCT | Solar Facility At Newman Power Station
Electric Capacity | MW																									10
NMPRC
Reconcilable Fuel Expense																									$ 190,400,000
Under-collection of fuel revenues, regulatory asset																					$ 1,000,000				$ 1,000,000
Fuel Reconciliation Period																									42 months
Debt Instrument, Face Amount																																$ 350,000,000
NMPRC | Holloman
Electric Capacity | MW																									5
FERC
Debt Issuance Authorization Date Range Start																									Nov. 15, 2017
Debt Issuance Authorization Date Range End																									Nov. 14, 2019
Show Cause Orders issued, Number							2
Number of public utilities affected							48
Debt Instrument, Face Amount																															$ 350,000,000
2016 Energy Efficiency Programs | PUCT
Public Utilities Approved Performance Incentive Bonus Related To Energy Efficiency Program									$ 800,000
2016 Energy Efficiency Programs | NMPRC
Public Utilities Requested Performance Incentive Bonus Related To Energy Efficiency Program																							$ 400,000
Public Utilities Approved Performance Incentive Bonus Related To Energy Efficiency Program																						$ 400,000
Fixed Fuel Factor | PUCT
Increase (Decrease) In Fixed Fuel Factor, Percentage												(19.00%)
Public Utilities, Requested Rate Increase (Decrease), Percentage					(29.00%)
2017 Energy Efficiency Programs | PUCT
Public Utilities Requested Performance Incentive Bonus Related To Energy Efficiency Program			$ 1,000,000
2017 Energy Efficiency Programs | NMPRC
Public Utilities Requested Performance Incentive Bonus Related To Energy Efficiency Program																			$ 400,000
Public Utilities Approved Performance Incentive Bonus Related To Energy Efficiency Program															$ 400,000
2015 Energy Efficiency Programs | NMPRC
Public Utilities Requested Performance Incentive Bonus Related To Energy Efficiency Program																			$ 300,000
Public Utilities Approved Performance Incentive Bonus Related To Energy Efficiency Program																								$ 300,000
Public Utilities, Regulatory Rate Making Impact | PUCT
Period To Relate Back New Rates										167 days								80 days
Public Utilities, Regulatory Rate Making Impact | NMPRC
Public Utilities, Approved Return on Equity, Percentage																				9.48%
Public Utilities, Regulatory Rate Making Impact | Non-Fuel Base Rate | NMPRC
Public Utilities, Approved Rate Increase (Decrease), Amount																				$ 600,000
Public Utilities, Regulatory Rate Making Impact | Utility Cost Of Service | NMPRC
Public Utilities, Approved Rate Increase (Decrease), Amount																				$ 500,000
NMPRC Case No. 15-00127-UT
Fuel Reconciliation Period																				24 months
PUCT Docket No. 46831
Recovery of rate case expenses											$ 3,400,000
Surcharge Or Refund Period											3 years
Minimum Distributive Generation Charge											$ 30.00
Nuclear Decommissioning Funding, Annual Recovery											2,100,000
Requested Depreciation Expense, Decrease											$ 1,900,000
Public Utilities, Approved Return on Equity, Percentage											9.65%
PUCT Docket No. 46831 | Four Corners decommissioning
Decommissioning Costs Increase (Decrease)											$ 5,500,000
Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided													7 years
PUCT Docket No. 46831 | Non-Fuel Base Rate
Public Utilities, Approved Rate Increase (Decrease), Amount											$ 14,500,000
PUCT Docket No. 46610 | Fixed Fuel Factor
Increase (Decrease) In Fixed Fuel Factor, Percentage																28.80%
PUCT Docket No. 46308
Reconcilable Fuel Expense																	$ 436,600,000
Fuel Reconciliation Period														36 months			36 months
Fuel reconciliation effect, net amount																							$ 5,000,000			$ 5,000,000		$ 5,000,000
Palo Verde Performance Award Period														3 years
NMPRC Case No. 18-00099-UT | Community Solar at Doña Ana County
Electric capacity, requested | MW																													2
NMPRC Case No. 18-00016-UT
Public Utilities, Approved Rate Increase (Decrease), Amount				$ (4,900,000)
NMPRC Case No. 18-00016-UT | Subsequent Event
Public Utilities Requested Performance Incentive Bonus Related To Energy Efficiency Program	$ 400,000
Public Utilities Requested Performance Incentive Bonus Related To Energy Efficiency Program, percentage of expenditures	7.10%
Maximum | FERC
Period to comply with order from regulatory agency							60 days
RGRT | FERC
Debt Instrument, Face Amount																															65,000,000
RGRT | NMPRC Case No. 15-00280-UT
Debt Instrument, Face Amount																																	$ 65,000,000
7.25% 2009 Series A Refunding Bonds, due 2040 | FERC
Debt Instrument, Face Amount																															$ 63,500,000
Debt Instrument, Interest Rate, Stated Percentage																															7.25%
7.25% 2009 Series A Refunding Bonds, due 2040 | NMPRC Case No. 17-00217-UT | NMPRC
Debt Instrument, Face Amount																																$ 63,500,000
Debt Instrument, Interest Rate, Stated Percentage																																7.25%
7.25% 2009 Series B Refunding Bonds, due 2040 | FERC
Debt Instrument, Face Amount																															$ 37,100,000
Debt Instrument, Interest Rate, Stated Percentage																															7.25%
7.25% 2009 Series B Refunding Bonds, due 2040 | NMPRC Case No. 17-00217-UT | NMPRC
Debt Instrument, Face Amount																																$ 37,100,000
Debt Instrument, Interest Rate, Stated Percentage																																7.25%
Senior Notes | 4.22% Senior Notes, due 2028
Debt Instrument, Face Amount		$ 125,000,000
Debt Instrument, Issuance Date		Jun. 28, 2018
Debt Instrument, Interest Rate, Stated Percentage		4.22%
Debt Instrument, Maturity Date		Aug. 15, 2028
Senior Notes | 4.22% Senior Notes, due 2028 | FERC
Debt Instrument, Face Amount		$ 125,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.22%
Senior Notes | 4.22% Senior Notes, due 2028 | NMPRC Case No. 17-00217-UT
Debt Instrument, Face Amount		$ 125,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.22%
Senior Notes | 4.07% RGRT Senior Notes, due 2025
Debt Instrument, Face Amount		$ 65,000,000
Debt Instrument, Issuance Date		Jun. 28, 2018
Debt Instrument, Interest Rate, Stated Percentage		4.07%
Debt Instrument, Maturity Date		Aug. 15, 2025
Senior Notes | 4.07% RGRT Senior Notes, due 2025 | FERC
Debt Instrument, Face Amount		$ 65,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.07%
Senior Notes | 4.07% RGRT Senior Notes, due 2025 | NMPRC Case No. 15-00280-UT
Debt Instrument, Face Amount		$ 65,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.07%

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Palo Verde (Narrative) (Details) - Suit Against Department of Energy for Spent Fuel - Palo Verde Generating Station	Aug. 18, 2014	Dec. 19, 2012
Jointly Owned Utility Plant Interests [Line Items]
Settlement Agreement, Counterparty's Name		United States Department of Energy
Loss Contingency, Settlement Agreement, Date	August 18, 2014

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Palo Verde Operations and Maintenance Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Jointly Owned Utility Plant Interests [Line Items]
Utilities Operating Expense, Maintenance and Operations	$ 88,855	$ 82,273	$ 169,015	$ 161,460	$ 327,836	$ 321,070
Palo Verde Generating Station
Jointly Owned Utility Plant Interests [Line Items]
Utilities Operating Expense, Maintenance and Operations	$ 24,977	$ 25,931	$ 47,152	$ 47,539	$ 98,977	$ 98,062

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Common Stock (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 28, 2018	Sep. 14, 2018	Jul. 19, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Dividends, Common Stock, Cash				$ 14,600	$ 13,600	$ 28,257	$ 26,157	$ 55,400	$ 51,300
Common Stock, Dividends, Per Share, Declared				$ 0.360	$ 0.335	$ 0.695	$ 0.645	$ 1.365	$ 1.265
Scenario, Forecast
Dividends Payable, Date to be Paid	Sep. 28, 2018
Dividends Payable, Date of Record		Sep. 14, 2018
Subsequent Event
Dividends Payable, Date Declared			Jul. 19, 2018
Common Stock, Dividends, Per Share, Declared			$ 0.360

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Common Stock (Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Basic number of common shares outstanding	40,517,713	40,409,030	40,504,526	40,398,192	40,467,231	40,381,776
Dilutive effect of unvested performance awards	130,086	116,555	113,519	101,152	126,818	85,219
Diluted number of common shares outstanding	40,647,799	40,525,585	40,618,045	40,499,344	40,594,049	40,466,995
Net income	$ 33,295	$ 36,066	$ 26,329	$ 32,077	$ 92,513	$ 112,369
Income allocated to participating restricted stock	(124)	(142)	(98)	(119)	(336)	(423)
Net income available to common shareholders, basic	33,171	35,924	26,231	31,958	92,177	111,946
Income reallocated to participating restricted stock	(124)	(142)	(98)	(119)	(336)	(423)
Net income available to common shareholders, diluted	$ 33,171	$ 35,924	$ 26,231	$ 31,958	$ 92,177	$ 111,946
Earnings Per Share, Basic, Distributed	$ 0.36	$ 0.335	$ 0.695	$ 0.645	$ 1.365	$ 1.265
Earnings (losses) Per Share, Basic, Undistributed	0.46	0.555	(0.045)	0.145	0.915	1.505
Basic net income per common share	0.82	0.890	0.650	0.790	2.280	2.770
Earnings Per Share, Diluted, Distributed	0.36	0.335	0.695	0.645	1.365	1.265
Earnings (losses) Per Share, Diluted, Undistributed	0.46	0.555	(0.045)	0.145	0.905	1.505
Diluted net income per common share	$ 0.82	$ 0.890	$ 0.650	$ 0.790	$ 2.270	$ 2.770

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Common Stock (Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details) - shares		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Performance shares payout based upon performance		0	0	0	0	0	0
Performance shares payout level		100.00%	100.00%	100.00%	100.00%	100.00%	100.00%
Restricted Stock
Antidilutive Securities Excluded from the Computation of Diluted Earnings Per Share, Amount		55,368	58,792	63,793	68,409	65,432	62,352
Performance Shares
Antidilutive Securities Excluded from the Computation of Diluted Earnings Per Share, Amount	[1]	0	0	22,989	0	11,494	6,906

[1] Certain performance shares were excluded from the computation of diluted earnings per share as no payouts would have been required based upon performance at the end of each corresponding period.

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Income Taxes (Income Tax Rates) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Income Tax [Line Items]
Effective tax rate	24.40%	35.40%	22.70%	35.30%	30.80%		36.00%
Federal statutory tax rate	21.00%	35.00%	21.00%	35.00%		35.00%
Income Tax Rate Capital Gains	20.00%	20.00%	20.00%	20.00%	20.00%		20.00%
Maximum
Income Tax [Line Items]
Period in which adjustments related to the Federal Tax Cuts and Jobs Act of 2017 needed to be made			12 months

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Income Taxes (Details) - Latest Tax Year	6 Months Ended
	Jun. 30, 2018
Internal Revenue Service (IRS)
Income Tax [Line Items]
Tax Year Closed	2012
TEXAS
Income Tax [Line Items]
Tax Year Closed	2012
NEW MEXICO
Income Tax [Line Items]
Tax Year Closed	2012
ARIZONA
Income Tax [Line Items]
Tax Year Closed	2012

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Employee Benefits ASU Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operations and maintenance	$ 88,855	$ 82,273	$ 169,015	$ 161,460	$ 327,836	$ 321,070
Investment and interest income, net	11,072	12,056	16,227	21,319	33,761	39,251
Miscellaneous non-operating income	3,072	2,897	6,208	5,792	12,466	11,404
Miscellaneous non-operating deductions	2,769	2,669	5,512	5,497	11,594	11,404
Other interest	$ 5,115	4,728	$ 9,769	9,073	$ 18,866	17,473
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operations and maintenance		2,000		4,100		8,100
Investment and interest income, net		5,200		10,500		20,900
Miscellaneous non-operating income		2,900		5,700		10,800
Miscellaneous non-operating deductions		2,100		4,200		7,800
Other interest		4,000		7,900		15,800
Service cost component		2,500		5,400		10,900
Net periodic benefit cost previously reported in operating income (including non-service cost components)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operations and maintenance		$ 500		$ 1,300		$ 2,800

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Employee Benefits (Retirement Plans And Other Postretirement Benefits) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,757	$ 1,989	$ 5,515	$ 4,259	$ 9,774	$ 8,450
Interest cost	3,222	3,282	6,445	6,530	12,974	13,039
Expected return on plan assets	(5,315)	(4,787)	(10,630)	(9,595)	(20,224)	(19,049)
Amortization of net (gain) loss	2,100	2,138	4,200	4,227	8,427	7,791
Amortization of prior service benefit	(877)	(875)	(1,755)	(1,753)	(3,508)	(3,504)
Net periodic benefit cost (benefit)	1,887	1,747	3,775	3,668	7,443	6,727
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	700	530	1,400	1,118	2,518	2,457
Interest cost	565	684	1,130	1,362	2,491	2,784
Expected return on plan assets	(612)	(483)	(1,225)	(953)	(2,179)	(1,868)
Amortization of net (gain) loss	(525)	(444)	(1,050)	(839)	(1,889)	(1,883)
Amortization of prior service benefit	(1,537)	(1,538)	(3,075)	(3,076)	(6,150)	(5,402)
Net periodic benefit cost (benefit)	$ (1,409)	$ (1,251)	$ (2,820)	$ (2,388)	$ (5,209)	$ (3,912)

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Employee Benefits (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Employer Contribution	$ 5.8
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	9.4
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Employer Contribution	0.2
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	$ 0.5

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Financial Instruments And Investments (Carrying Amount and Fair Value Amounts) (Details) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure		$ 1,465,599	$ 1,369,521
Carrying (Reported) Amount, Fair Value Disclosure | Pollution Control Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure		157,723	157,676
Carrying (Reported) Amount, Fair Value Disclosure | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	[1]	1,117,914	993,426
Carrying (Reported) Amount, Fair Value Disclosure | RGRT Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	[1],[2]	109,517	44,886
Carrying (Reported) Amount, Fair Value Disclosure | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	[2]	80,445	173,533
Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure		1,609,593	1,601,711
Estimate of Fair Value Measurement | Pollution Control Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure		165,349	169,186
Estimate of Fair Value Measurement | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	[1]	1,252,149	1,211,922
Estimate of Fair Value Measurement | RGRT Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	[1],[2]	111,650	47,070
Estimate of Fair Value Measurement | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	[2]	$ 80,445	$ 173,533

[1] On June 28, 2018, the Company issued $125 million in aggregate principal amount of 4.22% Senior Notes due August 15, 2028 and guaranteed the issuance by the RGRT of $65 million in aggregate principal amount of 4.07% Senior Notes due August 15, 2025. See Note L, Long-Term Debt and Financing Obligations.

[2] Nuclear fuel financing, as of June 30, 2018 and December 31, 2017, is funded through $110 million and $45 million RGRT Senior Notes and $24.4 million and $88.5 million, respectively, under the RCF. As of June 30, 2018 and December 31, 2017, $56.0 million and $85.0 million, respectively, was outstanding under the RCF for working capital or general corporate purposes. The interest rate on the Company's borrowings under the RCF is reset throughout the quarter reflecting current market rates. Consequently, the carrying value approximates fair value.

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Financial Instruments And Investments (Long-Term Debt and Short-Term Borrowings - Narratives) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 28, 2018	Dec. 31, 2017
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments	$ 287,126		$ 286,866
Nuclear Fuel Financing
Financial Instruments and Investments [Line Items]
Line of Credit Facility, Amount Outstanding	24,400		88,500
Working Capital and General Purpose
Financial Instruments and Investments [Line Items]
Line of Credit Facility, Amount Outstanding	56,000		85,000
RGRT Senior Notes
Financial Instruments and Investments [Line Items]
Long-term Debt, Gross	$ 110,000		$ 45,000
4.22% Senior Notes, due 2028 | Senior Notes
Financial Instruments and Investments [Line Items]
Debt Instrument, Face Amount		$ 125,000
Debt Instrument, Interest Rate, Stated Percentage		4.22%
4.07% RGRT Senior Notes, due 2025 | Senior Notes
Financial Instruments and Investments [Line Items]
Debt Instrument, Face Amount		$ 65,000
Debt Instrument, Interest Rate, Stated Percentage		4.07%

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Financial Instruments And Investments (Marketable Securities Fair Value And Unrealized Losses) (Details) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2018 USD ($) securities		Dec. 31, 2017 USD ($) securities
Financial Instruments and Investments [Line Items]
Marketable Securities Fair Value Less than 12 Months	[1]			$ 49,503
Marketable Securities Unrealized Losses Less Than 12 Months	[1]			(852)
Marketable Securities Fair Value 12 Months or Longer	[1]			42,496
Marketable Securities Unrealized Losses 12 Months or Longer	[1]			(2,207)
Marketable Securities Fair Value Total	[1]			91,999
Marketable Securities Unrealized Losses Total	[1]			$ (3,059)
Number of securities | securities		158		146
Debt Securities
Financial Instruments and Investments [Line Items]
Marketable Securities Fair Value Less than 12 Months		$ 77,683	[2]	$ 48,541	[1]
Marketable Securities Unrealized Losses Less Than 12 Months		(2,435)	[2]	(642)	[1]
Marketable Securities Fair Value 12 Months or Longer		37,898	[2]	42,496	[1]
Marketable Securities Unrealized Losses 12 Months or Longer		(2,683)	[2]	(2,207)	[1]
Marketable Securities Fair Value Total		115,581	[2]	91,037	[1]
Marketable Securities Unrealized Losses Total		(5,118)	[2]	(2,849)	[1]
Federal Agency Mortgage Backed Securities
Financial Instruments and Investments [Line Items]
Marketable Securities Fair Value Less than 12 Months		11,527	[2]	4,700	[1]
Marketable Securities Unrealized Losses Less Than 12 Months		(169)	[2]	(46)	[1]
Marketable Securities Fair Value 12 Months or Longer		10,180	[2]	10,099	[1]
Marketable Securities Unrealized Losses 12 Months or Longer		(460)	[2]	(165)	[1]
Marketable Securities Fair Value Total		21,707	[2]	14,799	[1]
Marketable Securities Unrealized Losses Total		(629)	[2]	(211)	[1]
U.S. Government Bonds
Financial Instruments and Investments [Line Items]
Marketable Securities Fair Value Less than 12 Months		34,018	[2]	28,866	[1]
Marketable Securities Unrealized Losses Less Than 12 Months		(1,178)	[2]	(416)	[1]
Marketable Securities Fair Value 12 Months or Longer		17,625	[2]	18,186	[1]
Marketable Securities Unrealized Losses 12 Months or Longer		(1,298)	[2]	(969)	[1]
Marketable Securities Fair Value Total		51,643	[2]	47,052	[1]
Marketable Securities Unrealized Losses Total		(2,476)	[2]	(1,385)	[1]
Municipal Obligations
Financial Instruments and Investments [Line Items]
Marketable Securities Fair Value Less than 12 Months		5,442	[2]	4,290	[1]
Marketable Securities Unrealized Losses Less Than 12 Months		(138)	[2]	(73)	[1]
Marketable Securities Fair Value 12 Months or Longer		6,953	[2]	9,736	[1]
Marketable Securities Unrealized Losses 12 Months or Longer		(600)	[2]	(742)	[1]
Marketable Securities Fair Value Total		12,395	[2]	14,026	[1]
Marketable Securities Unrealized Losses Total		(738)	[2]	(815)	[1]
Corporate Obligations
Financial Instruments and Investments [Line Items]
Marketable Securities Fair Value Less than 12 Months		26,696	[2]	10,685	[1]
Marketable Securities Unrealized Losses Less Than 12 Months		(950)	[2]	(107)	[1]
Marketable Securities Fair Value 12 Months or Longer		3,140	[2]	4,475	[1]
Marketable Securities Unrealized Losses 12 Months or Longer		(325)	[2]	(331)	[1]
Marketable Securities Fair Value Total		29,836	[2]	15,160	[1]
Marketable Securities Unrealized Losses Total		$ (1,275)	[2]	(438)	[1]
Domestic Equity Securities | Equity Securities
Financial Instruments and Investments [Line Items]
Marketable Securities Fair Value Less than 12 Months	[1]			962
Marketable Securities Unrealized Losses Less Than 12 Months	[1]			(210)
Marketable Securities Fair Value 12 Months or Longer	[1]			0
Marketable Securities Unrealized Losses 12 Months or Longer	[1]			0
Marketable Securities Fair Value Total	[1]			962
Marketable Securities Unrealized Losses Total	[1]			$ (210)

[1] Includes 146 securities.

[2] Includes 158 securities.

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Financial Instruments And Investments (Unrealized Holding Losses Included In Pre-Tax Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financial Instruments And Investments [Abstract]
Unrealized losses included in pre-tax income	$ 0	$ 0	$ 0	$ 0	$ 0	$ (196)

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Financial Instruments And Investments (Marketable Securities Fair Value and Unrecognized Gross Unrealized Gains) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Gross Unrealized Gain	$ 607	$ 53,130
Marketable Securities Fair Value, Total	13,546	194,867
Debt Securities
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Unrealized Gain Position, Fair Value	13,546	39,134
Available-for-sale Securities, Gross Unrealized Gain	607	1,635
Federal Agency Mortgage Backed Securities
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Unrealized Gain Position, Fair Value	2,758	5,933
Available-for-sale Securities, Gross Unrealized Gain	96	203
U.S. Government Bonds
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Unrealized Gain Position, Fair Value	1,890	11,129
Available-for-sale Securities, Gross Unrealized Gain	88	256
Municipal Obligations
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Unrealized Gain Position, Fair Value	1,232	2,558
Available-for-sale Securities, Gross Unrealized Gain	84	109
Corporate Obligations
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Unrealized Gain Position, Fair Value	7,666	19,514
Available-for-sale Securities, Gross Unrealized Gain	339	1,067
Equity Securities | Domestic Equity Securities
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Unrealized Gain Position, Fair Value	0	120,065
Available-for-sale Securities, Gross Unrealized Gain	0	45,587
Equity Securities | International Equity Securities
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Unrealized Gain Position, Fair Value	0	28,804
Available-for-sale Securities, Gross Unrealized Gain	0	5,908
Cash | Held in trust Decommissioning Fund Investment
Financial Instruments and Investments [Line Items]
Available-for-sale Securities, Gross Unrealized Gain	0	0
Cash	$ 0	$ 6,864

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Financial Instruments And Investments (Contractual Year For Maturity Of Available-For-Sale Securities ) (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Federal Agency Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Total	$ 24,465
2018	0
2019 through 2022	15
2023 through 2027	245
2028 and Beyond	24,205
U.S. Government Bonds
Schedule of Available-for-sale Securities [Line Items]
Total	53,533
2018	1,886
2019 through 2022	28,137
2023 through 2027	10,872
2028 and Beyond	12,638
Municipal Obligations
Schedule of Available-for-sale Securities [Line Items]
Total	13,627
2018	121
2019 through 2022	5,492
2023 through 2027	5,789
2028 and Beyond	2,225
Corporate Obligations
Schedule of Available-for-sale Securities [Line Items]
Total	37,502
2018	0
2019 through 2022	17,303
2023 through 2027	8,471
2028 and Beyond	$ 11,728

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Financial Instruments And Investments (Sale Of Securities And The Related Effects On Pre-Tax Income ) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investment [Line Items]
Proceeds from sales or maturities of available-for-sale securities	$ 2,608	$ 36,476	$ 14,365	$ 62,531	$ 48,871	$ 113,087
Gross realized gains included in pre-tax income	0	5,322	9	7,909	3,873	12,880
Gross realized losses included in pre-tax income	(147)	(156)	(674)	(552)	(1,269)	(1,185)
Gross unrealized losses included in pre-tax income	0	0	0	0	0	(196)
Net gains (losses) included in pre-tax income	$ (147)	$ 5,166	$ (665)	$ 7,357	$ 2,604	$ 11,499

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Financial Instruments And Investments Unrealized gains and losses on equity securities (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Unrealized Gains and losses recognized [Line Items]
Net gains and (losses) recognized on equity securities	$ 3,249	$ 1,258
Less: Net (gains) and losses recognized on equity securities sold	2,266	4,056
Unrealized gains and (losses) recognized on equity securities still held at reporting date	$ 983	$ (2,798)

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Financial Instruments And Investments (Company's Decommissioning Trust Funds And Investments In Debt Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	$ 287,126
Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	211,532
Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	75,594
Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Cash
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	6,375
Cash | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	6,375
Cash | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Cash | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		$ 286,866
Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		214,876
Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		71,990
Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Federal Agency Mortgage Backed Securities | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		20,732
Federal Agency Mortgage Backed Securities | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Federal Agency Mortgage Backed Securities | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		20,732
Federal Agency Mortgage Backed Securities | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
U.S. Government Bonds | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		58,181
U.S. Government Bonds | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		58,181
U.S. Government Bonds | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
U.S. Government Bonds | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Municipal Obligations | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		16,584
Municipal Obligations | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Municipal Obligations | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		16,584
Municipal Obligations | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Corporate Obligations | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		34,674
Corporate Obligations | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Corporate Obligations | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		34,674
Corporate Obligations | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Debt Securities
Financial Instruments and Investments [Line Items]
Trading Securities	1,697	1,735
Debt Securities | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Trading Securities	0	0
Debt Securities | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Trading Securities	0	0
Debt Securities | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Trading Securities	1,697	1,735
Debt Securities | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		130,171
Debt Securities | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		58,181
Debt Securities | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		71,990
Debt Securities | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Equity Securities
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	151,624
Equity Securities | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	151,624
Equity Securities | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Equity Securities | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Equity Securities | Domestic Equity Securities
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	123,756
Equity Securities | Domestic Equity Securities | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	123,756
Equity Securities | Domestic Equity Securities | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Equity Securities | Domestic Equity Securities | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Equity Securities | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		149,831
Equity Securities | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		149,831
Equity Securities | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Equity Securities | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Equity Securities | International Equity Securities
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	27,868
Equity Securities | International Equity Securities | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	27,868
Equity Securities | International Equity Securities | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Equity Securities | International Equity Securities | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Cash | Held in trust Decommissioning Fund Investment
Financial Instruments and Investments [Line Items]
Cash	0	6,864
Cash | Held in trust Decommissioning Fund Investment | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Cash		6,864
Cash | Held in trust Decommissioning Fund Investment | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Cash		0
Cash | Held in trust Decommissioning Fund Investment | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Cash		0
Available-for-sale Securities
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	129,127
Available-for-sale Securities | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	53,533
Available-for-sale Securities | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	75,594
Available-for-sale Securities | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | Federal Agency Mortgage Backed Securities
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	24,465
Available-for-sale Securities | Federal Agency Mortgage Backed Securities | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | Federal Agency Mortgage Backed Securities | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	24,465
Available-for-sale Securities | Federal Agency Mortgage Backed Securities | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | U.S. Government Bonds
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	53,533
Available-for-sale Securities | U.S. Government Bonds | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	53,533
Available-for-sale Securities | U.S. Government Bonds | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | U.S. Government Bonds | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | Municipal Obligations
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	13,627
Available-for-sale Securities | Municipal Obligations | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | Municipal Obligations | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	13,627
Available-for-sale Securities | Municipal Obligations | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | Corporate Obligations
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	37,502
Available-for-sale Securities | Corporate Obligations | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	0
Available-for-sale Securities | Corporate Obligations | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	37,502
Available-for-sale Securities | Corporate Obligations | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Decommissioning Fund Investments, Fair Value	$ 0
Domestic Equity Securities | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		121,027
Domestic Equity Securities | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		121,027
Domestic Equity Securities | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
Domestic Equity Securities | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
International Equity Securities | Decommisioning Fund Investments
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		28,804
International Equity Securities | Decommisioning Fund Investments | Quoted Prices In Active Markets For Identical Assets (Level 1)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		28,804
International Equity Securities | Decommisioning Fund Investments | Significant Other Observable Inputs (Level 2)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		0
International Equity Securities | Decommisioning Fund Investments | Significant Unobservable Inputs (Level 3)
Financial Instruments and Investments [Line Items]
Available-for-sale Securities		$ 0

XML

Financial Instruments And Investments Transfers Between Levels (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Description	no	no	no	no	no	no
Fair Value, Assets, Level 2 to Level 1 Transfers, Description	no	no	no	no	no	no
Fair Value, Asset, Level 3 Purchases, (Sales), Issuances, (Settlements)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0

XML

Long-Term Debt and Financing Obligations (Details) - Senior Notes $ in Thousands	Jun. 28, 2018 USD ($)
4.22% Senior Notes, due 2028
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Jun. 28, 2018
Debt Instrument, Face Amount	$ 125,000
Debt Instrument, Interest Rate, Stated Percentage	4.22%
Debt Instrument, Maturity Date	Aug. 15, 2028
Debt Instrument, Redemption Price, Percentage	100.00%
4.07% RGRT Senior Notes, due 2025
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Jun. 28, 2018
Debt Instrument, Face Amount	$ 65,000
Debt Instrument, Interest Rate, Stated Percentage	4.07%
Debt Instrument, Maturity Date	Aug. 15, 2025
Debt Instrument, Redemption Price, Percentage	100.00%