Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Components of net periodic benefit cost

The following tables provide the components of aggregate annual net periodic benefit cost for each of the years ended December 31, 2015, 2014, and 2013 and changes in the benefit obligation and the funded status of the pension, supplemental executive retirement and other postretirement benefit plans as recognized in the consolidated balance sheet as of December 31, 2015 and 2014.

Components of Net Periodic Benefit Cost
	Pension and Supplemental Executive Retirement Plans									Other Postretirement Benefits
(In thousands)	12/31/2015			12/31/2014			12/31/2013			12/31/2015			12/31/2014			12/31/2013
1. Company Service Cost	$	10,256		$	8,565		$	11,338		$	833		$	659		$	812
2. Interest Cost	15,847			15,987			15,289			697			653			618
3. Expected Return on Assets	(21,109		)	(21,030		)	(20,144		)	(4,991		)	(4,648		)	(3,679		)
4. Other Adjustments	—			—			—			—			—			—
Subtotal	4,994			3,522			6,483			(3,461		)	(3,336		)	(2,249		)
5. Amortization of :
a. Net Transition Obligation/(Asset)	—			—			—			—			—			—
b. Net Prior Service Cost/(Credit)	(845		)	(930		)	503			(6,649		)	(6,649		)	(6,649		)
c. Net Losses/(Gains)	5,485			1,083			6,145			(175		)	(435		)	—
Total Amortization	4,640			153			6,648			(6,824		)	(7,084		)	(6,649		)
6. Net Periodic Benefit Cost	9,634			3,675			13,131			(10,285		)	(10,420		)	(8,898		)
7. Cost of settlements or curtailments	3,172			302			—			—			—			—
8. Total Expense for Year	$	12,806		$	3,977		$	13,131		$	(10,285	)	$	(10,420	)	$	(8,898	)

Development of funded status

Development of Funded Status
	Pension and Supplemental Executive Retirement Plans						Other Postretirement Benefits
(In thousands)	12/31/2015			12/31/2014			12/31/2015			12/31/2014
Actuarial Value of Benefit Obligations
1.Measurement Date	12/31/2015			12/31/2014			12/31/2015			12/31/2014
2. Accumulated Benefit Obligation	$	338,450		$	366,440		$	16,423		$	18,225
Funded Status/Asset (Liability) on the Consolidated Balance Sheet
1. Projected Benefit Obligation	$	(349,483	)	$	(379,324	)	$	(16,423	)	$	(18,225	)
2. Plan Assets at Fair Value	350,107			378,701			65,568			66,940
3. Funded Status - Overfunded/Asset	624			N/A			$	49,145		$	48,715
4. Funded Status - Underfunded/Liability	N/A			(623		)	N/A			N/A

Accumulated Other Comprehensive Income
	Pension and Supplemental Executive Retirement Plans						Other Postretirement Benefits
(In thousands)	12/31/2015			12/31/2014			12/31/2015			12/31/2014
1. Net Actuarial (Gain)/Loss	$	95,636		$	93,243		$	(5,311	)	$	(8,222	)
2. Net Prior Service Cost/(Credit)	(2,989		)	(3,853		)	(18,640		)	(25,289		)
3. Net Transition Obligation/(Asset)	—			—			—			—
4. Total at Year End	$	92,647		$	89,390		$	(23,951	)	$	(33,511	)

Change in projected benefit obligation

The changes in the projected benefit obligation are as follows:

Change in Projected Benefit/Accumulated Benefit Obligation
	Pension and Supplemental Executive Retirement Plans						Other Postretirement Benefits
(In thousands)	12/31/2015			12/31/2014			12/31/2015			12/31/2014
1. Benefit Obligation at Beginning of Year	$	379,324		$	317,606		$	18,225		$	15,764
2. Company Service Cost	10,256			8,565			833			659
3. Interest Cost	15,847			15,987			697			653
4. Plan Participants' Contributions	—			—			361			336
5. Net Actuarial (Gain)/Loss due to Assumption Changes	(24,118		)	59,901			(2,083		)	2,276
6. Net Actuarial (Gain)/Loss due to Plan Experience	7,155			(55		)	(397		)	(855		)
7. Benefit Payments from Fund (1)	(32,646		)	(21,539		)	(1,147		)	(645		)
8. Benefit Payments Directly by Company	(7,661		)	(1,404		)	—			—
9. Plan Amendments	19			(1		)	—			—
10. Other Adjustment	1,307			264			(66		)	37
11. Benefit Obligation at End of Year	$	349,483		$	379,324		$	16,423		$	18,225

(1) Includes lump sum payments of $22.4 million and $11.8 million in 2015 and 2014, respectively, from our pension plan to eligible participants, which were former employees with vested benefits.

Change in plan assets

The changes in the fair value of the net assets available for plan benefits are as follows:

Change in Plan Assets
	Pension and Supplemental Executive Retirement Plans						Other Postretirement Benefits
(In thousands)	12/31/2015			12/31/2014			12/31/2015			12/31/2014
1. Fair Value of Plan Assets at Beginning of Year	$	378,701		$	355,704		$	66,940		$	62,298
2. Company Contributions	17,311			9,504			—			—
3. Plan Participants' Contributions	—			—			361			336
4. Benefit Payments from Fund	(32,646		)	(21,539		)	(1,147		)	(645		)
5. Benefit Payments paid directly by Company	(7,661		)	(1,404		)	—			—
6. Actual Return on Assets	(5,094		)	36,436			(225		)	5,250
7. Other Adjustment	(504		)	—			(361		)	(299		)
8. Fair Value of Plan Assets at End of Year	$	350,107		$	378,701		$	65,568		$	66,940

Change in accumulated other comprehensive income (AOCI)

Change in Accumulated Other Comprehensive Income (AOCI)
	Pension and Supplemental Executive Retirement Plans						Other Postretirement Benefits
(In thousands)	12/31/2015			12/31/2014			12/31/2015			12/31/2014
1. AOCI in Prior Year	$	89,390		$	45,143		$	(33,511	)	$	(41,377	)
2. Increase/(Decrease) in AOCI
a. Recognized during year - Prior Service (Cost)/Credit	845			930			6,649			6,649
b. Recognized during year - Net Actuarial (Losses)/Gains	(5,485		)	(1,083		)	175			435
c. Occurring during year - Prior Service Cost	19			(1		)	—			—
d. Occurring during year - Net Actuarial Losses/(Gains)	11,050			44,703			2,736			782
f.  Occurring during year - Net Settlement Losses/(Gains)	(3,172		)	(302		)	—			—
e. Other adjustments	—			—			—			—
3. AOCI in Current Year	$	92,647		$	89,390		$	(23,951	)	$	(33,511	)

Amortizations expected to be recognized during next fiscal year

Amortizations Expected to be Recognized During Next Fiscal Year Ending
(In thousands)	Pension and Supplemental Executive Retirement Plans			Other Postretirement Benefits
	12/31/2016			12/31/2016
1. Amortization of Net Transition Obligation/(Asset)	$	—		$	—
2. Amortization of Prior Service Cost/(Credit)	(689		)	(6,649		)
3. Amortization of Net Losses/(Gains)	5,443			—

Actuarial assumptions

The projected benefit obligations, net periodic benefit costs and accumulated postretirement benefit obligation for the plans were determined using the following weighted average assumptions.

Actuarial Assumptions
	Pension and Supplemental Executive Retirement Plans				Other Postretirement Benefits
	12/31/2015		12/31/2014		12/31/2015		12/31/2014
Weighted-Average Assumptions Used to Determine
Benefit Obligations at year end
1. Discount Rate	4.65	%	4.25	%	4.30	%	4.00	%
2. Rate of Compensation Increase	3.00	%	3.00	%	N/A		N/A
Weighted-Average Assumptions Used to Determine
Net Periodic Benefit Cost for Year
1. Discount Rate	4.25	%	5.15	%	4.00	%	4.75	%
2. Expected Long-term Return on Plan Assets	5.75	%	6.00	%	7.50	%	7.50	%
3. Rate of Compensation Increase	3.00	%	3.00	%	N/A		N/A
Assumed Health Care Cost Trend Rates at year end
1. Health Care Cost Trend Rate Assumed for Next Year	N/A		N/A		7.00	%	7.00	%
2. Rate to Which the Cost Trend Rate is Assumed to Decline (Ultimate Trend Rate)	N/A		N/A		5.00	%	5.00	%
3. Year That the Rate Reaches the Ultimate Trend Rate	N/A		N/A		2020		2019

Year-end asset allocations of the plans

The year-end asset allocations of the plans are as follows:

Plan Assets
	Pension Plan				Other Postretirement Benefits
	12/31/2015		12/31/2014		12/31/2015		12/31/2014
Allocation of Assets at year end
1. Equity Securities	20	%	22	%	100	%	100	%
2. Debt Securities	80	%	78	%	—	%	—	%
3. Total	100	%	100	%	100	%	100	%

Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]

Schedule of investment allocation strategies

The equity investments utilize combinations of mutual funds, ETFs, and pooled equity account structures focused on the following strategies:

Strategy	Objective	Investment types
Return seeking growth	Funded ratio improvement over the long term	●	Global quality growth
		●	Global low volatility
Return seeking bridge	Downside protection in the event of a declining	●	Enduring asset
	equity market	●	Durable company

Minimum and maximum allocation ranges for fixed income securities and equity securities

The primary focus in developing asset allocation ranges for the portfolio is the assessment of the portfolio's investment objectives and the level of risk that is acceptable to obtain those objectives.  To achieve these goals the minimum and maximum allocation ranges for fixed income securities and equity securities are:

	Minimum		Maximum
Equities (long only)	70	%	100	%
Real estate	0	%	15	%
Commodities	0	%	10	%
Fixed income/Cash	0	%	10	%

Actual and estimated future contributions and actual and estimated future benefit payments

The following tables show the current and estimated future contributions and benefit payments.

Company Contributions
	Pension and Supplemental Executive Retirement Plans		Other Postretirement Benefits
(In thousands)	12/31/2015		12/31/2015
Company Contributions for the Year Ending:
1. Current	$	17,311	$	—
2. Current + 1	11,350		—

Benefit Payments (Total)
	Pension and Supplemental Executive Retirement Plans		Other Postretirement Benefits
(In thousands)	12/31/2015		12/31/2015
Actual Benefit Payments for the Year Ending:
1. Current	$	40,307	$	851
Expected Benefit Payments for the Year Ending:
2. Current + 1	22,992		779
3. Current + 2	21,773		819
4. Current + 3	23,353		997
5. Current + 4	26,065		1,079
6. Current + 5	26,761		1,288
7. Current + 6 - 10	140,707		8,247

Effect of a 1% change in the health care trend rate assumption

A 1 percentage point change in the health care trend rate assumption would have the following effects on other postretirement benefits:

(In thousands)	1-Percentage Point Increase		1-Percentage Point Decrease
Effect on total service and interest cost components	$	304	$	(253	)
Effect on postretirement benefit obligation	2,221		(1,959		)

Pension Plan

Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]

Fair value of plan assets

The following table sets forth by level, within the fair value hierarchy, the pension plan assets at fair value as of December 31, 2015 and 2014. There were no securities that utilized Level 3 inputs.

Pension Plan
Assets at Fair Value as of December 31, 2015
(In thousands)	Level 1		Level 2		Total
Domestic Mutual Funds	$	1,442	$	—	$	1,442
Corporate Bonds	—		188,332		188,332
U.S. Government Securities	3,133		497		3,630
Municipals	—		61,206		61,206
Foreign Bonds	—		25,251		25,251
ETF's	5,676		—		5,676
Pooled Equity Accounts	—		64,570		64,570
Total Assets at fair value	$	10,251	$	339,856	$	350,107

Pension Plan
Assets at Fair Value as of December 31, 2014
(In thousands)	Level 1		Level 2		Total
Domestic Mutual Funds	$	9,913	$	—	$	9,913
Corporate Bonds	—		200,732		200,732
U.S. Government Securities	5,327		1,234		6,561
Municipals	—		65,214		65,214
Foreign Bonds	—		23,028		23,028
ETF's	5,636		—		5,636
Pooled Equity Accounts	—		67,617		67,617
Total Assets at fair value	$	20,876	$	357,825	$	378,701

Other Postretirement Benefit Plan

Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]

Fair value of plan assets

The following table sets forth the other postretirement benefits plan assets at fair value as of December 31, 2015 and 2014. All are Level 1 assets.

Other Postretirement Benefits Plan
Assets at Fair Value as of December 31, 2015
(In thousands)	Level 1		Total
Domestic Mutual Funds	$	49,887	$	49,887
International Mutual Funds	15,681		15,681
Total Assets at fair value	$	65,568	$	65,568

Other Postretirement Benefits Plan
Assets at Fair Value as of December 31, 2014
(In thousands)	Level 1		Total
Domestic Mutual Funds	$	50,710	$	50,710
International Mutual Funds	16,230		16,230
Total Assets at fair value	$	66,940	$	66,940