Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Changes in benefit obligation and plan assets

Changes in benefit obligation and plan assets for the years ended December 31, 2013 and 2012, and amounts recognized in the Consolidated Balance Sheets at December 31, 2013 and 2012, were as follows:



	Pension Benefits						Other Postretirement Benefits
	2013			2012			2013			2012
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	459,111		$	435,618		$	103,358		$	110,689
Service cost	155			1,078			1,675			1,747
Interest cost	16,249			17,598			3,215			4,166
Plan participants' contributions	—			—			1,472			2,688
Amendments	—			—			—			(11,418		)
Actuarial (gain) loss	(44,551		)	30,939			(20,985		)	3,469
Benefits paid	(28,192		)	(26,122		)	(7,009		)	(7,983		)
Benefit obligation at end of year	402,772			459,111			81,726			103,358
Change in net plan assets:
Fair value of plan assets at beginning of year	309,184			278,000			74,361			68,085
Actual gain on plan assets	35,539			34,493			13,819			6,497
Employer contribution	18,313			22,813			1,900			5,074
Plan participants' contributions	—			—			1,472			2,688
Benefits paid	(28,192		)	(26,122		)	(7,009		)	(7,983		)
Fair value of net plan assets at end of year	334,844			309,184			84,543			74,361
Funded status - (under) over	$	(67,928	)	$	(149,927	)	$	2,817		$	(28,997	)
Amounts recognized in the Consolidated Balance Sheets at December 31:
Other assets (noncurrent)	$	—		$	—		$	9,679		$	—
Other accrued liabilities (current)	—			—			(381		)	(655		)
Other liabilities (noncurrent)	(67,928		)	(149,927		)	(6,481		)	(28,342		)
Net amount recognized	$	(67,928	)	$	(149,927	)	$	2,817		$	(28,997	)
Amounts recognized in accumulated other comprehensive (income) loss consist of:
Actuarial loss	$	135,061		$	202,406		$	11,314		$	43,589
Prior service cost (credit)	365			437			(17,137		)	(18,594		)
Total	$	135,426		$	202,843		$	(5,823	)	$	24,995

The projected benefit obligation, accumulated benefit obligation and fair value of plan assets for the pension plans with accumulated benefit obligations in excess of plan assets

The pension plans all have accumulated benefit obligations in excess of plan assets. The projected benefit obligation, accumulated benefit obligation and fair value of plan assets for these plans at December 31 were as follows:



	2013		2012
	(In thousands)
Projected benefit obligation	$	402,772	$	459,111
Accumulated benefit obligation	$	402,772	$	459,111
Fair value of plan assets	$	334,844	$	309,184

Components of net periodic benefit cost

Components of net periodic benefit cost for the Company's pension and other postretirement benefit plans for the years ended December 31 were as follows:



	Pension Benefits									Other Postretirement Benefits
	2013			2012			2011			2013			2012			2011
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	155		$	1,078		$	2,252		$	1,675		$	1,747		$	1,443
Interest cost	16,249			17,598			19,500			3,215			4,166			4,700
Expected return on assets	(19,917		)	(23,536		)	(22,809		)	(4,343		)	(4,890		)	(5,051		)
Amortization of prior service cost (credit)	71			(46		)	45			(1,457		)	(1,438		)	(2,677		)
Recognized net actuarial loss	7,173			7,070			4,656			1,814			2,134			753
Curtailment loss (gain)	—			(1,023		)	1,218			—			—			—
Amortization of net transition obligation	—			—			—			—			2,128			2,125
Net periodic benefit cost, including amount capitalized	3,731			1,141			4,862			904			3,847			1,293
Less amount capitalized	727			937			1,196			164			910			(50		)
Net periodic benefit cost	3,004			204			3,666			740			2,937			1,343
Other changes in plan assets and benefit obligations recognized in accumulated other comprehensive (income) loss:
Net (gain) loss	(60,173		)	19,982			76,310			(30,461		)	1,863			23,863
Prior service credit	—			—			—			—			(11,418		)	—
Amortization of actuarial loss	(7,173		)	(7,070		)	(4,656		)	(1,814		)	(2,134		)	(753		)
Amortization of prior service (cost) credit	(71		)	1,069			(1,263		)	1,457			1,438			2,677
Amortization of net transition obligation	—			—			—			—			(2,128		)	(2,125		)
Total recognized in accumulated other comprehensive (income) loss	(67,417		)	13,981			70,391			(30,818		)	(12,379		)	23,662
Total recognized in net periodic benefit cost and accumulated other comprehensive (income) loss	$	(64,413	)	$	14,185		$	74,057		$	(30,078	)	$	(9,442	)	$	25,005

Weighted average assumptions used to determine benefit obligations and net periodic benefit costs

Weighted average assumptions used to determine benefit obligations at December 31 were as follows:



	Pension Benefits				Other Postretirement Benefits
	2013		2012		2013		2012
Discount rate	4.53	%	3.65	%	4.48	%	3.67	%
Expected return on plan assets	7.00	%	7.00	%	6.00	%	6.00	%
Rate of compensation increase	N/A		N/A		3.00	%	4.00	%

Weighted average assumptions used to determine net periodic benefit cost for the years ended December 31 were as follows:



	Pension Benefits				Other Postretirement Benefits
	2013		2012		2013		2012
Discount rate	3.65	%	4.16	%	3.67	%	4.13	%
Expected return on plan assets	7.00	%	7.75	%	6.00	%	6.75	%
Rate of compensation increase	N/A*		N/A*		4.00	%	4.00	%

* Effective September 30, 2012, all benefit and service accruals for a union plan were frozen. Compensation increases had previously been frozen for all other plans.

Health care rate assumptions for the Company's other postretirement benefit plans

Health care rate assumptions for the Company's other postretirement benefit plans as of December 31 were as follows:



				2013					2012
Health care trend rate assumed for next year	6.0	%	-	7.0	%	6.0	%	-	8.0	%
Health care cost trend rate - ultimate	5.0	%	-	6.0	%	5.0	%	-	6.0	%
Year in which ultimate trend rate achieved				2017					2017

Assumed health care cost trend rates

Assumed health care cost trend rates may have a significant effect on the amounts reported for the health care plans. A one percentage point change in the assumed health care cost trend rates would have had the following effects at December 31, 2013:



	1 Percentage Point Increase		1 Percentage Point Decrease
	(In thousands)
Effect on total of service and interest cost components	$	159	$	(135	)
Effect on postretirement benefit obligation	$	3,352	$	(2,920	)

The fair value of the Company's pension net plan assets by class

The fair value of the Company's pension plans' assets (excluding cash) by class were as follows:



	Fair Value Measurements at December 31, 2013, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2013
	(In thousands)
Assets:
Cash equivalents	$	—	$	9,406	$	—	$	9,406
Equity securities:
U.S. companies	62,599		—		—		62,599
International companies	39,437		—		—		39,437
Collective and mutual funds*	116,265		42,483		—		158,748
Corporate bonds	—		42,721		—		42,721
Municipal bonds	—		7,561		—		7,561
U.S. Treasury securities	7,487		4,335		—		11,822
Total assets measured at fair value	$	225,788	$	106,506	$	—	$	332,294

* Collective and mutual funds invest approximately 11 percent in common stock of mid-cap U.S. companies, 34 percent in common stock of large-cap U.S. companies, 11 percent in U.S. Treasuries, 27 percent in corporate bonds and 17 percent in other investments.

The fair value of the Company's pension plans' assets by class were as follows:



	Fair Value Measurements at December 31, 2012, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2012
	(In thousands)
Assets:
Cash equivalents	$	2,145	$	10,460	$	—	$	12,605
Equity securities:
U.S. companies	86,981		—		—		86,981
International companies	39,818		—		—		39,818
Collective and mutual funds*	82,787		20,065		—		102,852
Corporate bonds	—		45,112		—		45,112
Municipal bonds	—		9,302		—		9,302
U.S. Treasury securities	7,980		4,534		—		12,514
Total assets measured at fair value	$	219,711	$	89,473	$	—	$	309,184

* Collective and mutual funds invest approximately 12 percent in common stock of mid-cap U.S. companies, 26 percent in common stock of large-cap U.S. companies, 13 percent in U.S. Treasuries, 41 percent in corporate bonds and 8 percent in other investments.

Summary of changes in the fair value of the pension plan's Level 3 assets

The following table sets forth a summary of changes in the fair value of the pension plans' Level 3 assets for the year ended December 31, 2012:



	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
	Corporate Bonds
	(In thousands)
Balance at beginning of year	$	289
Total realized/unrealized losses	(47		)
Purchases, issuances and settlements (net)	(242		)
Balance at end of year	$	—

Fair value of other postretirement benefit plan assets by asset class

The fair value of the Company's other postretirement benefit plans' assets (excluding cash) by asset class were as follows:



	Fair Value Measurements at December 31, 2013, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2013
	(In thousands)
Assets:
Cash equivalents	$	—	$	2,142	$	—	$	2,142
Equity securities:
U.S. companies	2,802		—		—		2,802
International companies	221		—		—		221
Insurance contract*	—		79,374		—		79,374
Total assets measured at fair value	$	3,023	$	81,516	$	—	$	84,539

* The insurance contract invests approximately 55 percent in common stock of large-cap U.S. companies, 12 percent in U.S. Treasuries, 8 percent in mortgage-backed securities, 8 percent in common stock of mid-cap U.S. companies, 9 percent in corporate bonds and 8 percent in other investments.

The fair value of the Company's other postretirement benefit plans' assets by asset class were as follows:



	Fair Value Measurements at December 31, 2012, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2012
	(In thousands)
Assets:
Cash equivalents	$	1,053	$	1,991	$	—	$	3,044
Equity securities:
U.S. companies	2,207		—		—		2,207
International companies	260		—		—		260
Insurance contract*	—		68,850		—		68,850
Total assets measured at fair value	$	3,520	$	70,841	$	—	$	74,361

* The insurance contract invests approximately 51 percent in common stock of large-cap U.S. companies, 15 percent in U.S. Treasuries, 10 percent in mortgage-backed securities, 11 percent in corporate bonds and 13 percent in other investments.

Benefit payments expected to be paid

The following benefit payments, which reflect future service, as appropriate, and expected Medicare Part D subsidies are as follows:



Years	Pension Benefits		Other Postretirement Benefits		Expected Medicare Part D Subsidy
	(In thousands)
2014	$	23,391	$	5,596	$	237
2015	23,645		5,584		230
2016	23,911		5,583		221
2017	24,439		5,543		211
2018	24,814		5,483		200
2019 - 2023	130,026		26,038		823

Multiemployer plans



	EIN/Pension Plan Number	Pension Protection Act Zone Status		FIP/RP Status Pending/Implemented	Contributions						Surcharge Imposed	Expiration Date of Collective Bargaining Agreement
Pension Fund		2013	2012		2013		2012		2011
					(In thousands)
Edison Pension Plan	93-6061681-001	Green as of 12/31/2013	Green as of 12/31/2012	No	$	6,358	$	5,171	$	2,700	No	12/31/2014
IBEW Local 38 Pension Plan	34-6574238-001	Yellow as of 4/30/2013	Yellow as of 4/30/2012	Implemented	1,041		2,771		1,469		No	4/27/2014
IBEW Local No. 82 Pension Plan	31-6127268-001	Red as of 6/30/2013	Red as of 6/30/2012	Implemented	1,284		1,093		1,331		No	11/30/2014
IBEW Local 648 Pension Plan	31-6134845-001	Red as of 2/28/2013	Red as of 2/29/2012	Implemented	1,489		564		722		No	8/31/2015
Laborers Pension Trust Fund for Northern California	94-6277608-001	Yellow as of 5/31/2013	Yellow as of 5/31/2012	Implemented	921		567		628		No	6/30/2016
National Electrical Benefit Fund	53-0181657-001	Green	Green	No	5,883		5,603		4,841		No	5/31/2012*– 8/31/2017
OE Pension Trust Fund	94-6090764-001	Yellow	Yellow as of 12/31/2012	Implemented	1,510		1,156		1,367		No	6/30/2013*– 3/31/2016
Operating Engineers Local 800 & WY Contractors Association, Inc. Pension Plan for Wyoming	83-6011320-001	Red as of 12/31/2013	Red as of 12/31/2012	Implemented	76		91		96		No	10/31/2005*
Operating Engineers Pension Trust	95-6032478-001	Red as of 6/30/2013	Red as of 6/30/2012	Implemented	493		761		458		No	7/1/2013*– 7/20/2014
Pension and Retirement Plan of Plumbers and Pipefitters Union Local No. 525	88-6003864-001	Green as of 6/30/2012	Green as of 6/30/2011	No	1,657		1,202		759		No	5/31/2010*
Sheet Metal Workers' Pension Plan of Southern CA, AZ and NV	95-6052257-001	Red as of 12/31/2013	Red as of 12/31/2012	Implemented	512		467		336		No	6/30/2014
Other funds					18,036		15,333		14,451
Total contributions					$	39,260	$	34,779	$	29,158

* Plan includes collective bargaining agreements which have expired. The agreements contain provisions that automatically renew the existing contracts in lieu of a new negotiated collective bargaining agreement.

The Company was listed in the plans' Forms 5500 as providing more than 5 percent of the total contributions for the following plans and plan years:



Pension Fund	Year Contributions to Plan Exceeded More Than 5 Percent of Total Contributions (as of December 31 of the Plan's Year-End)
Edison Pension Plan	2012 and 2011
IBEW Local 38 Pension Plan	2012 and 2011
IBEW Local No. 82 Pension Plan	2012 and 2011
Local Union No. 124 IBEW Pension Trust Fund	2012 and 2011
Local Union 212 IBEW Pension Trust Fund	2012 and 2011
IBEW Local Union No. 357 Pension Plan A	2012 and 2011
IBEW Local 648 Pension Plan	2012 and 2011
Idaho Plumbers and Pipefitters Pension Plan	2012 and 2011
Minnesota Teamsters Construction Division Pension Fund	2012 and 2011
Operating Engineers Local 800 & WY Contractors Association, Inc. Pension Plan for Wyoming	2012 and 2011
Pension and Retirement Plan of Plumbers and Pipefitters Union Local No. 525	2012 and 2011