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Pension and Postretirement Plans (Tables)
 9 Months Ended
Sep. 30, 2014
Defined Benefit Pension Plan [Member]
  
Schedule of Net Benefit Costs
Defined Benefit Plans. The total (benefit) cost arising from the Company’s defined benefit pension plans, including a portion included in discontinued operations, consists of the following components:
  
Three Months Ended September 30
 
Nine Months Ended September 30
(in thousands)
2014
 
2013
 
2014
 
2013
Service cost
$
6,976

 
$
12,713

 
$
21,489

 
$
38,788

Interest cost
12,894

 
14,242

 
38,870

 
42,776

Expected return on assets
(29,877
)
 
(26,817
)
 
(90,644
)
 
(78,606
)
Amortization of prior service cost
83

 
908

 
247

 
2,726

Recognized actuarial (gain) loss
(7,280
)
 
1,797

 
(21,599
)
 
5,741

Net Periodic (Benefit) Cost
(17,204
)
 
2,843

 
(51,637
)
 
11,425

Early retirement programs expense
3,884

 
—

 
8,374

 
22,700

Total (Benefit) Cost
$
(13,320
)
 
$
2,843

 
$
(43,263
)
 
$
34,125
Schedule of Allocation of Plan Assets
The assets of the Company’s pension plan were allocated as follows:
  
As of
  
September 30,
2014
 
December 31,
2013
  
 
U.S. equities
60
%
 
58
%
U.S. fixed income
11
%
 
12
%
International equities
29
%
 
30
%
  
100
%
 
100
%
Supplemental Executive Retirement Plan (SERP) [Member]
  
Schedule of Net Benefit Costs
The total cost arising from the Company’s Supplemental Executive Retirement Plan (SERP), including a portion included in discontinued operations, consists of the following components:
  
Three Months Ended September 30
 
Nine Months Ended September 30
(in thousands)
2014
 
2013
 
2014
 
2013
Service cost
$
373

 
$
429

 
$
1,119

 
$
1,288

Interest cost
1,086

 
1,023

 
3,257

 
3,069

Amortization of prior service cost
12

 
14

 
35

 
41

Recognized actuarial loss
374

 
711

 
1,124

 
2,133

Net Periodic Cost
1,845

 
2,177

 
5,535

 
6,531

Early retirement programs expense
2,422

 
—

 
2,422

 
—

Total Cost
$
4,267

 
$
2,177

 
$
7,957

 
$
6,531
Other Postretirement Benefit Plan, Defined Benefit [Member]
  
Schedule of Net Benefit Costs
Other Postretirement Plans. The total cost (benefit) arising from the Company’s other postretirement plans, including a portion included in discontinued operations, consists of the following components:
  
Three Months Ended September 30
 
Nine Months Ended September 30
(in thousands)
2014
 
2013
 
2014
 
2013
Service cost
$
375

 
$
728

 
$
1,125

 
$
2,183

Interest cost
362

 
508

 
1,086

 
1,525

Amortization of prior service credit
(196
)
 
(1,306
)
 
(587
)
 
(3,972
)
Recognized actuarial gain
(519
)
 
(504
)
 
(1,557
)
 
(1,549
)
Net Periodic Cost (Benefit)
22

 
(574
)
 
67

 
(1,813
)
Settlement gain
—

 
—

 
—

 
(3,471
)
Total Cost (Benefit)
$
22

 
$
(574
)
 
$
67

 
$
(5,284
)