Pension and Other Postretirement Benefits (tables)

12 Months Ended

Dec. 31, 2013

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Postretirement Benefit Plans
	Pension Benefits						Other Benefits
In thousands	2013			2012			2013			2012
Reconciliation of change in benefit obligation:
Obligation at January 1	$	435,889		$	391,127		$	33,119		$	30,049
Service cost	8,698			8,047			656			592
Interest cost	16,400			17,295			1,157			1,267
Net actuarial (gain) loss	(51,043		)	37,615			(4,283		)	3,182
Benefits paid	(18,855		)	(18,195		)	(1,895		)	(1,971		)
Obligation at December 31	$	391,089		$	435,889		$	28,754		$	33,119
Reconciliation of change in plan assets:
Fair value of plan assets at January 1	$	249,603		$	215,970		$	—		$	—
Actual return on plan assets	22,872			26,683			—			—
Employer contributions	13,442			25,145			1,895			1,971
Benefits paid	(18,855		)	(18,195		)	(1,895		)	(1,971		)
Fair value of plan assets at December 31	$	267,062		$	249,603		$	—		$	—
Funded status at December 31	$	(124,027	)	$	(186,286	)	$	(28,754	)	$	(33,119	)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	Regulatory Assets																		Other Comprehensive Income
	Pension Benefits									Other Postretirement Benefits									Pension Benefits
In thousands	2013			2012			2011			2013			2012			2011			2013			2012			2011
Net actuarial (gain) loss	$	(51,892	)	$	26,504		$	66,404		$	(4,283	)	$	3,182		$	2,225		$	(3,302	)	$	3,511		$	2,948
Amortization of:
Transition obligation	—			—			—			—			(411		)	(411		)	—			—			—
Prior service cost	(230		)	(230		)	(230		)	(197		)	(197		)	(197		)	7			35			(122		)
Actuarial loss	(16,744		)	(14,482		)	(10,731		)	(733		)	(435		)	(289		)	(1,550		)	(1,150		)	(854		)
Total	$	(68,866	)	$	11,792		$	55,443		$	(5,213	)	$	2,139		$	1,328		$	(4,845	)	$	2,396		$	1,972

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Regulatory Assets								AOCL
	Pension Benefits				Other Postretirement Benefits				Pension Benefits
In thousands	2013		2012		2013		2012		2013			2012
Prior service cost	$	867	$	1,097	$	685	$	882	$	(5	)	$	(12	)
Net actuarial loss	119,638		188,278		4,665		9,681		10,475			15,327
Total	$	120,505	$	189,375	$	5,350	$	10,563	$	10,470		$	15,315

Schedule of Accumulated Other Comprehensive Income (Loss) Rollforward Table [Table Text Block]

	Year Ended December 31,
In thousands	2013			2012
Beginning balance	$	(9,291	)	$	(7,800	)
Amounts reclassified to AOCL	3,302			(3,495		)
Amounts reclassified from AOCL:
Amortization of prior service costs	(7		)	(35		)
Amortization of actuarial losses	1,550			1,134
Total reclassifications before tax	4,845			(2,396		)
Tax (benefit) expense	(1,912		)	905
Total reclassifications for the period	2,933			(1,491		)
Ending balance	$	(6,358	)	$	(9,291	)

Schedule of Allocation of Plan Assets [Table Text Block]

Asset Category	Target Allocation
U.S. large cap equity	13.0	%
U.S. small/mid cap equity	8.5
Non-U.S. equity	13.0
Emerging markets equity	3.5
Long government/credit	30.0
High yield bonds	5.0
Emerging market debt	5.0
Real estate funds	6.0
Absolute return strategy	11.0
Real return strategy	5.0

Net Periodic Benefit Cost Components

	Pension Benefits									Other Postretirement Benefits
In thousands	2013			2012			2011			2013			2012			2011
Service cost	$	8,698		$	8,047		$	7,122		$	656		$	592		$	614
Interest cost	16,400			17,295			18,134			1,157			1,267			1,404
Expected return on plan assets	(18,721		)	(19,082		)	(17,867		)	—			—			—
Amortization of transition obligations	—			—			—			—			411			411
Amortization of prior service costs	223			195			352			197			197			197
Amortization of net actuarial loss	18,294			15,631			11,584			734			435			289
Net periodic benefit cost	24,894			22,086			19,325			2,744			2,902			2,915
Amount allocated to construction	(6,712		)	(5,820		)	(4,905		)	(856		)	(882		)	(878		)
Amount deferred to regulatory balancing account(1)	(9,115		)	(7,876		)	(6,008		)	—			—			—
Net amount charged to expense	$	9,067		$	8,390		$	8,412		$	1,888		$	2,020		$	2,037

Sensitivity Analysis Of Retirement Benefit Costs and Benefit Obligations [Table Text Block]

	Pension Benefits						Other Postretirement Benefits
	2013		2012		2011		2013		2012		2011
Assumptions for net periodic benefit cost:
Weighted-average discount rate	3.84	%	4.51	%	5.49	%	3.56	%	4.33	%	5.16	%
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	%	8.00	%	8.25	%	n/a		n/a		n/a
Assumptions for year-end funded status:
Weighted-average discount rate	4.73	%	3.85	%	4.51	%	4.45	%	3.56	%	4.33	%
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	%	8.00	%	n/a		n/a		n/a

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

In thousands	1% Increase		1% Decrease
Effect on net periodic postretirement health care benefit cost	$	73	$	(64	)
Effect on the accumulated postretirement benefit obligation	739		(660		)

Defined Benefit Plan Estimated Future Employer Contributions Benefit Payments and Estimated Future Payments [Table Text Block]

In thousands	Pension Benefits		Other Benefits
Employer Contributions:
2012	$	25,559	$	1,971
2013	13,907		1,895
2014 (estimated)	15,607		1,892
Benefit Payments:
2011	18,269		1,870
2012	18,195		1,971
2013	18,855		1,895
Estimated Future Benefit Payments:
2014	19,450		1,892
2015	20,033		1,927
2016	20,671		2,001
2017	21,424		2,053
2018	22,337		2,112
2019-2023	129,177		10,823

Schedule of Changes in Fair Value of Plan Assets [Table Text Block]

In thousands	December 31, 2013
Investments	Level 1		Level 2		Level 3		Total
U.S. large cap equity	$	39,124	$	79	$	—	$	39,203
U.S. small/mid cap equity	30,465		55		—		30,520
Non-U.S. equity	16,782		17,202		—		33,984
Emerging markets equity	7,405		—		—		7,405
Fixed income	—		367		—		367
Long government/credit	33,152		32,763		—		65,915
High yield bonds	—		12,890		—		12,890
Emerging market debt	9,987		—		—		9,987
Real estate funds	16,559		—		—		16,559
Absolute return strategy	—		35,339		—		35,339
Real return strategy	13,031		—		—		13,031
Cash and cash equivalents	—		1,418		—		1,418
Total investments	$	166,505	$	100,113	$	—	$	266,618
	December 31, 2012
Investments	Level 1		Level 2		Level 3		Total
U.S. large cap equity	$	29,047	$	1,891	$	—	$	30,938
U.S. small/mid cap equity	21,624		1,312		—		22,936
Non-U.S. equity	13,931		15,812		—		29,743
Emerging markets equity	8,004		—		—		8,004
Fixed income	—		8,824		—		8,824
Long government/credit	30,098		29,249		—		59,347
High yield bonds	—		12,017		—		12,017
Emerging market debt	11,421		—		—		11,421
Real estate funds	15,992		—		—		15,992
Absolute return strategy	—		32,078		—		32,078
Real return strategy	12,932		—		—		12,932
Cash and cash equivalents	—		1,459		—		1,459
Total investments	$	143,049	$	102,642	$	—	$	245,691
					December 31,
Receivables					2013		2012
Accrued interest and dividend income					$	468	$	388
Due from broker for securities sold					1,154		4,459
Total receivables					$	1,622	$	4,847
Liabilities
Due to broker for securities purchased					$	1,178	$	935
Total investment in retirement trust					$	267,062	$	249,603