Pension and Other Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2015



	Postretirement Benefit Plans
	Pension Benefits						Other Benefits
In thousands	2015			2014			2015			2014
Reconciliation of change in benefit obligation:
Obligation at January 1	$	487,278		$	391,089		$	32,072		$	28,754
Service cost	8,267			7,213			527			483
Interest cost	18,360			18,198			1,179			1,252
Plan amendments⁽¹⁾	—			—			(3,435		)	—
Net actuarial (gain) loss	(32,354		)	90,710			2,724			3,454
Benefits paid	(35,923		)	(19,932		)	(2,018		)	(1,871		)
Obligation at December 31	$	445,628		$	487,278		$	31,049		$	32,072

Reconciliation of change in plan assets:
Fair value of plan assets at January 1	$	279,164		$	267,062		$	—		$	—
Actual return on plan assets	(9,599		)	19,957			—			—
Employer contributions	15,696			12,077			2,018			1,871
Benefits paid	(35,923		)	(19,932		)	(2,018		)	(1,871		)
Fair value of plan assets at December 31	$	249,338		$	279,164		$	—		$	—
Funded status at December 31	$	(196,290	)	$	(208,114	)	$	(31,049	)	$	(32,072	)



	Regulatory Assets																		Other Comprehensive Loss (Income)
	Pension Benefits									Other Postretirement Benefits									Pension Benefits
In thousands	2015			2014			2013			2015			2014			2013			2015			2014			2013
Net actuarial loss (gain)	$	419		$	83,027		$	(51,892	)	$	2,724		$	3,454		$	(4,283	)	$	(2,549	)	$	7,221		$	(3,302	)
Amortization of:
Prior service cost	(230		)	(230		)	(230		)	(197		)	(197		)	(197		)	—			7			7
Actuarial loss	(16,372		)	(9,823		)	(16,744		)	(554		)	(221		)	(733		)	(2,236		)	(1,091		)	(1,550		)
Total	$	(16,183	)	$	72,974		$	(68,866	)	$	1,973		$	3,036		$	(5,213	)	$	(4,785	)	$	6,137		$	(4,845	)



	Regulatory Assets									AOCL
	Pension Benefits				Other Postretirement Benefits					Pension Benefits
In thousands	2015		2014		2015			2014		2015		2014
Prior service cost (credit)	$	406	$	637	$	(3,143	)	$	488	$	1	$	2
Net actuarial loss	176,894		192,846		10,067			7,898		11,870		16,604
Total	$	177,300	$	193,483	$	6,924		$	8,386	$	11,871	$	16,606



	Year Ended December 31,
In thousands	2015			2014
Beginning balance	$	(10,076	)	$	(6,358	)
Amounts reclassified to AOCL	2,549			(7,221		)
Amounts reclassified from AOCL:
Amortization of prior service costs	—			(7		)
Amortization of actuarial losses	2,236			1,091
Total reclassifications before tax	4,785			(6,137		)
Tax (benefit) expense	(1,871		)	2,419
Total reclassifications for the period	2,914			(3,718		)
Ending balance	$	(7,162	)	$	(10,076	)



	Pension Benefits									Other Postretirement Benefits
In thousands	2015			2014			2013			2015			2014			2013
Service cost	$	8,267		$	7,213		$	8,698		$	527		$	483		$	656
Interest cost	18,360			18,198			16,400			1,179			1,252			1,157
Expected return on plan assets	(20,676		)	(19,496		)	(18,721		)	—			—			—
Amortization of prior service costs	231			223			223			197			197			197
Amortization of net actuarial loss	18,609			10,914			18,294			554			221			734
Net periodic benefit cost	24,791			17,052			24,894			2,457			2,153			2,744
Amount allocated to construction	(6,834		)	(4,625		)	(6,712		)	(808		)	(702		)	(856		)
Amount deferred to regulatory balancing account⁽¹⁾	(8,241		)	(4,578		)	(9,115		)	—			—			—
Net amount charged to expense	$	9,716		$	7,849		$	9,067		$	1,649		$	1,451		$	1,888



	Pension Benefits						Other Postretirement Benefits
	2015		2014		2013		2015		2014		2013
Assumptions for net periodic benefit cost:
Weighted-average discount rate	3.82	%	4.71	%	3.84	%	3.74	%	4.45	%	3.56	%
Rate of increase in compensation	3.25-5.0%		3.25-5.0%		3.25-5.0%		n/a		n/a		n/a
Expected long-term rate of return	7.50	%	7.50	%	7.50	%	n/a		n/a		n/a
Assumptions for year-end funded status:
Weighted-average discount rate	4.21	%	3.85	%	4.73	%	4.00	%	3.74	%	4.45	%
Rate of increase in compensation	3.25-4.5%		3.25-5.0%		3.25-5.0%		n/a		n/a		n/a
Expected long-term rate of return	7.50	%	7.50	%	7.50	%	n/a		n/a		n/a



In thousands	1% Increase		1% Decrease
Effect on net periodic postretirement health care benefit cost	$	100	$	(74	)
Effect on the accumulated postretirement benefit obligation	742		(665		)



In thousands	Pension Benefits		Other Benefits
Employer Contributions:
2014	$	12,077	$	1,871
2015	15,696		2,018
2016 (estimated)	16,695		2,035
Benefit Payments:
2013	18,855		1,895
2014	19,932		1,871
2015	35,923		2,018
Estimated Future Benefit Payments:
2016	21,589		2,035
2017	22,028		2,060
2018	22,974		2,073
2019	23,950		2,132
2020	26,242		2,178
2021-2025	134,736		11,068



In thousands	December 31, 2015
Investments	Level 1		Level 2		Level 3		Total
U.S. large cap equity	$	44,528	$	—	$	—	$	44,528
U.S. small/mid cap equity	23,495		—		—		23,495
Non-U.S. equity	20,725		22,823		—		43,548
Emerging markets equity	—		11,120		—		11,120
Long government/credit	—		48,456		—		48,456
High yield bonds	—		12,298		—		12,298
Emerging market debt	7,746		—		—		7,746
Real estate funds	17,261		—		—		17,261
Absolute return strategy	—		36,758		—		36,758
Cash and cash equivalents	—		4,116		—		4,116
Total investments	$	113,755	$	135,571	$	—	$	249,326

	December 31, 2014
Investments	Level 1		Level 2		Level 3		Total
U.S. large cap equity	$	39,405	$	122	$	—	$	39,527
U.S. small/mid cap equity	27,172		85		—		27,257
Non-U.S. equity	16,369		17,221		—		33,590
Emerging markets equity	—		7,145		—		7,145
Fixed income	—		598		—		598
Long government/credit	40,584		40,235		—		80,819
High yield bonds	—		13,087		—		13,087
Emerging market debt	9,133		—		—		9,133
Real estate funds	18,890		—		—		18,890
Absolute return strategy	—		37,065		—		37,065
Real return strategy	8,308		—		—		8,308
Cash and cash equivalents	—		1,720		—		1,720
Total investments	$	159,861	$	117,278	$	—	$	277,139

					December 31,
Receivables					2015		2014
Accrued interest and dividend income					$	486	$	510
Due from broker for securities sold					88		1,694
Total receivables					$	574	$	2,204
Liabilities
Due to broker for securities purchased					$	562	$	179
Total investment in retirement trust					$	249,338	$	279,164