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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2014
Benefit Plans [Abstract]  
Components of net periodic benefit cost
The following tables provide the components of aggregate annual net periodic benefit cost, 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 sheets:

  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
Components of Net Periodic Benefit Cost for fiscal year ending
                           
  
12/31/2014
  
12/31/2013
  
12/31/2012
  
12/31/2014
  
12/31/2013
  
12/31/2012
 
  
(In thousands)
 
1. Company Service Cost
 
$
8,565
  
$
11,338
  
$
9,662
  
$
659
  
$
812
  
$
1,226
 
2. Interest Cost
  
15,987
   
15,289
   
16,481
   
653
   
618
   
1,144
 
3. Expected Return on Assets
  
(21,030
)
  
(20,144
)
  
(18,211
)
  
(4,648
)
  
(3,679
)
  
(3,162
)
4. Other Adjustments
  
-
   
-
   
-
   
-
   
-
   
-
 
Subtotal
  
3,522
   
6,483
   
7,932
   
(3,336
)
  
(2,249
)
  
(792
)
5. Amortization of :
                        
a. Net Transition Obligation/(Asset)
  
-
   
-
   
-
   
-
   
-
   
-
 
b. Net Prior Service Cost/(Credit)
  
(930
)
  
503
   
665
   
(6,649
)
  
(6,649
)
  
(6,217
)
c. Net Losses/(Gains)
  
1,083
   
6,145
   
5,829
   
(435
)
  
-
   
797
 
Total Amortization
  
153
   
6,648
   
6,494
   
(7,084
)
  
(6,649
)
  
(5,420
)
6. Net Periodic Benefit Cost
  
3,675
   
13,131
   
14,426
   
(10,420
)
  
(8,898
)
  
(6,212
)
7. Cost of settlements or curtailments
  
302
   
-
   
-
   
-
   
-
   
-
 
8. Total Expense for Year
 
$
3,977
  
$
13,131
  
$
14,426
  
$
(10,420
)
 
$
(8,898
)
 
$
(6,212
)
Development of funded status
Development of Funded Status
         
  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
  
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
  
(In thousands)
 
         
Actuarial Value of Benefit Obligations
        
1.Measurement Date
 
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
2. Accumulated Benefit Obligation
 
$
366,440
  
$
304,825
  
$
18,225
  
$
15,764
 
                 
Funded Status/Asset (Liability) on the Consolidated Balance Sheet
                
1. Projected Benefit Obligation
 
$
(379,324
)
 
$
(317,606
)
 
$
(18,225
)
 
$
(15,764
)
2. Plan Assets at Fair Value
  
378,701
   
355,704
   
66,940
   
62,298
 
3. Funded Status - Overfunded/Asset
  
N/A
 
 
$
38,098
  
$
48,715
  
$
46,534
 
4. Funded Status - Underfunded/Liability
  
(623
)
  
N/A
 
  
N/A
 
  
N/A
 

  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
Accumulated Other Comprehensive Income
            
  
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
  
(In thousands)
 
1. Net Actuarial (Gain)/Loss
 
$
93,243
  
$
49,925
  
$
(8,222
)
 
$
(9,439
)
2. Net Prior Service Cost/(Credit)
  
(3,853
)
  
(4,782
)
  
(25,289
)
  
(31,938
)
3. Net Transition Obligation/(Asset)
  
-
   
-
   
-
   
-
 
4. Total at Year End
 
$
89,390
  
$
45,143
  
$
(33,511
)
 
$
(41,377
)
Change in projected benefit obligation
The changes in the projected benefit obligation are as follows:

  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
Change in Projected Benefit/Accumulated Benefit Obligation
          
  
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
  
(In thousands)
 
1. Benefit Obligation at Beginning of Year
 
$
317,606
  
$
362,657
  
$
15,764
  
$
16,284
 
2. Company Service Cost
  
8,565
   
11,338
   
659
   
812
 
3. Interest Cost
  
15,987
   
15,289
   
653
   
618
 
4. Plan Participants' Contributions
  
-
   
-
   
336
   
299
 
5. Net Actuarial (Gain)/Loss due to Assumption Changes
  
59,901
   
(44,205
)
  
2,276
   
(1,414
)
6. Net Actuarial (Gain)/Loss due to Plan Experience
  
(55
)
  
1,353
   
(855
)
  
101
 
7. Benefit Payments from Fund (1)
  
(21,539
)
  
(22,497
)
  
(645
)
  
(871
)
8. Benefit Payments Directly by Company
  
(1,404
)
  
(275
)
  
-
   
(65
)
9. Plan Amendments
  
(1
)
  
(6,054
)
  
-
   
-
 
10. Other Adjustment
  
264
   
-
   
37
   
-
 
11. Benefit Obligation at End of Year
 
$
379,324
  
$
317,606
  
$
18,225
  
$
15,764
 

(1) In 2014, includes lump sum payments of $11.8 million from our pension plan to eligible participants, which were former employees with vested benefits. In 2013, includes lump sum payments of $13.8 million from our pension plan to eligible participants, which were former employees with vested benefits of $200 thousand or less.
Change in plan assets
The changes in the fair value of the net assets available for plan benefits are as follows:

  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
Change in Plan Assets
                
  
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
  
(In thousands)  
 
1. Fair Value of Plan Assets at Beginning of Year
 
$
355,704
  
$
340,335
  
$
62,298
  
$
49,391
 
2. Company Contributions
  
9,504
   
10,275
   
-
   
-
 
3. Plan Participants' Contributions
  
-
   
-
   
336
   
299
 
4. Benefit Payments from Fund
  
(21,539
)
  
(22,497
)
  
(645
)
  
(871
)
5. Benefit Payments paid directly by Company
  
(1,404
)
  
(275
)
  
-
   
(65
)
6. Actual Return on Assets
  
36,436
   
27,866
   
5,250
   
13,778
 
7. Other Adjustment
  
-
   
-
   
(299
)
  
(234
)
8. Fair Value of Plan Assets at End of Year
 
$
378,701
  
$
355,704
  
$
66,940
  
$
62,298
 
Change in accumulated other comprehensive income (AOCI)
  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
Change in Accumulated Other Comprehensive Income (AOCI)
             
  
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
  
(In thousands)
 
1. AOCI in Prior Year
 
$
45,143
  
$
108,436
  
$
(41,377
)
 
$
(36,602
)
2. Increase/(Decrease) in AOCI
                
a. Recognized during year - Prior Service (Cost)/Credit
  
930
   
(503
)
  
6,649
   
6,649
 
b. Recognized during year - Net Actuarial (Losses)/Gains
  
(1,083
)
  
(6,145
)
  
435
   
-
 
c. Occurring during year - Prior Service Cost
  
(1
)
  
(6,054
)
  
-
   
-
 
d. Occurring during year - Net Actuarial Losses/(Gains)
  
44,703
   
(50,574
)
  
782
   
(11,411
)
f.  Occuring during year - Net Settlement Losses/(Gains)
  
(302
)
  
-
   
-
   
-
 
e. Other adjustments
  
-
   
(17
)
  
-
   
(13
)
3. AOCI in Current Year
 
$
89,390
  
$
45,143
  
$
(33,511
)
 
$
(41,377
)
Amortizations expected to be recognized during next fiscal year
Amortizations Expected to be Recognized During Next Fiscal Year Ending
          
  
12/31/2015
      
12/31/2015
     
  
(In thousands)
 
1. Amortization of Net Transition Obligation/(Asset)
 
$
-
      
$
-
     
2. Amortization of Prior Service Cost/(Credit)
  
(846
)
      
(6,649
)
    
3. Amortization of Net Losses/(Gains)
  
4,837
       
(142
)
    
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.
 
  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
Actuarial Assumptions
                     
  
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
Weighted-Average Assumptions Used to Determine
        
Benefit Obligations at year end
        
1. Discount Rate
  
4.25
%
  
5.15
%
  
4.00
%
  
4.75
%
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
  
5.15
%
  
4.25
%
  
4.75
%
  
3.85
%
2. Expected Long-term Return on Plan Assets
  
6.00
%
  
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
 
  
2019
   
2018
 
Weighted-average asset allocations
The year-end asset allocations of the plans are as follows:

  
 
Pension Plan
  
Other Postretirement
Benefits
 
Plan Assets
                             
  
12/31/2014
  
12/31/2013
  
12/31/2014
  
12/31/2013
 
Allocation of Assets at year end
        
1. Equity Securities
  
22
%
  
43
%
  
100
%
  
100
%
2. Debt Securities
  
78
%
  
57
%
  
0
%
  
0
%
3. Total
  
100
%
  
100
%
  
100
%
  
100
%
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.

 
 
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
Company Contributions
        
  
12/31/2014
  
12/31/2014
 
  
(In thousands)
 
Company Contributions for the Year Ending:
   
1. Current
 
$
9,504
  
$
-
 
2. Current + 1
  
17,000
   
-
 
 
  
Pension and Supplemental
Executive Retirement Plans
  
Other Postretirement
Benefits
 
Benefit Payments (Total)
         
  
12/31/2014
  
12/31/2014
 
  
(In thousands)
 
Actual Benefit Payments for the Year Ending:
    
1. Current
 
$
22,942
  
$
272
 
Expected Benefit Payments for the Year Ending:
        
2. Current + 1
  
22,966
   
781
 
3. Current + 2
  
23,159
   
837
 
4. Current + 3
  
24,356
   
912
 
5. Current + 4
  
25,683
   
1,136
 
6. Current + 5
  
27,217
   
1,238
 
7. Current + 6 - 10
  
135,585
   
8,138
 
Effect of a 1% change in the health care trend rate assumption
A 1% point change in the health care trend rate assumption would have the following effects on other postretirement benefits:

 
1-Percentage
Point Increase
  
1-Percentage
Point Decrease
 
 
(In thousands)
 
     
Effect on total service and interest cost components
 
$
259
  
$
(201
)
Effect on postretirement benefit obligation
  
2,963
   
(2,466
)
Pension Plan [Member]  
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, 2014 and 2013.

Assets at Fair Value as of December 31, 2014
 
         
Pension Plan
 
Level 1
  
Level 2
  
Level 3
  
Total
 
  
(In thousands)
 
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
 

Assets at Fair Value as of December 31, 2013
 
         
Pension Plan
 
Level 1
  
Level 2
  
Level 3
  
Total
 
  
(In thousands)
 
Domestic Mutual Funds
 
$
51,240
  
$
-
  
$
-
  
$
51,240
 
International Mutual Funds
  
39,814
   
-
   
-
   
39,814
 
Common Stocks
  
60,332
   
-
   
-
   
60,332
 
Corporate Bonds
  
-
   
134,012
   
-
   
134,012
 
U.S. Government Securities
  
9,574
   
9,245
   
-
   
18,819
 
Municipals
  
-
   
33,402
   
-
   
33,402
 
Foreign Bonds
  
-
   
15,961
   
-
   
15,961
 
Foreign Stocks
  
2,124
   
-
   
-
   
2,124
 
Total Assets at fair value
 
$
163,084
  
$
192,620
  
$
-
  
$
355,704
 
Other Postretirement Benefits [Member]  
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 postretirement plan assets at fair value as of December 31, 2014 and 2013.

Assets at Fair Value as of December 31, 2014
 
         
Postretirement Plan
 
Level 1
  
Level 2
  
Level 3
  
Total
 
  
(In thousands)
 
Domestic Mutual Funds
 
$
50,710
  
$
-
  
$
-
  
$
50,710
 
International Mutual Funds
  
16,230
   
-
   
-
   
16,230
 
Total Assets at fair value
 
$
66,940
  
$
-
  
$
-
  
$
66,940
 

Assets at Fair Value as of December 31, 2013
 
         
Postretirement Plan
 
Level 1
  
Level 2
  
Level 3
  
Total
 
  
(In thousands)
 
Domestic Mutual Funds
 
$
45,585
  
$
-
  
$
-
  
$
45,585
 
International Mutual Funds
  
16,713
   
-
   
-
   
16,713
 
Total Assets at fair value
 
$
62,298
  
$
-
  
$
-
  
$
62,298