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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The following tables set forth the change in benefit obligation, change in plan assets, funded status, consolidated balance sheet presentation and net periodic benefit cost for the Company’s defined benefit pension plans and other benefits at and for the years ended December 31:
 
Pension Benefits
 
Other Benefits
 
2014
 
2013
 
2014
 
2013
Change in benefit obligation
 
 
 
 
 
 
 
Benefit obligation at beginning of year
$
468,945

 
$
673,711

 
$
13,085

 
$
15,727

Service cost
2,924

 
11,616

 
—

 
—

Interest cost
22,999

 
27,597

 
627

 
628

Actuarial loss (gain)
112,611

 
(72,187
)
 
1,909

 
(1,991
)
Plan participant contributions
—

 
—

 
69

 
65

Medicare retiree drug subsidy reimbursements
—

 
—

 
190

 
215

Benefits paid
(29,476
)
 
(26,185
)
 
(1,383
)
 
(1,559
)
Curtailments
—

 
(45,858
)
 
—

 
—

Settlements
—

 
(138,482
)
 
—

 
—

Special termination benefits
—

 
38,733

 
—

 
—

Benefit obligation at end of year
$
578,003

 
$
468,945

 
$
14,497

 
$
13,085

 
 
 
 
 
 
 
 
Change in plan assets
 
 
 
 
 
 
 
Fair value of plan assets at beginning of year
$
346,560

 
$
473,097

 
$
—

 
$
—

Actual return on plan assets
37,499

 
34,560

 
—

 
—

Employer contributions
9,622

 
3,570

 
1,314

 
1,494

Plan participant contributions
—

 
—

 
69

 
65

Benefits paid
(29,476
)
 
(26,185
)
 
(1,383
)
 
(1,559
)
Settlements
—

 
(138,482
)
 
—

 
—

Fair value of plan assets at end of year (1)
$
364,205

 
$
346,560

 
$
—

 
$
—

 
 
 
 
 
 
 
 
Funded status
$
(213,798
)
 
$
(122,385
)
 
$
(14,497
)
 
$
(13,085
)
 
 
 
 
 
 
 
 
Amounts recognized in balance sheets
 
 
 
 
 
 
 
Noncurrent assets
$
—

 
$
80

 
$
—

 
$
—

Current liabilities
3,478

 
4,456

 
1,361

 
1,482

Noncurrent liabilities (2)
210,320

 
118,010

 
13,136

 
11,604

Accumulated other comprehensive loss:
 
 
 
 
 
 
 
Unrecognized net actuarial loss (3)
(176,104
)
 
(77,987
)
 
(4,276
)
 
(2,570
)
Unrecognized prior service (cost) benefit (3)
(67
)
 
80

 
220

 
446

Net amount recognized
$
37,627

 
$
44,479

 
$
10,441

 
$
10,962

 
 
 
 
 
 
 
 
Change in accumulated other comprehensive loss
 
 
 
 
 
 
Balance at beginning of year
$
(77,906
)
 
$
(239,823
)
 
$
(2,123
)
 
$
(4,049
)
Prior service credit recognized during the year
(156
)
 
(313
)
 
(226
)
 
(488
)
Net actuarial losses recognized during the year
3,025

 
14,469

 
202

 
423

Net actuarial (losses) gains occurring during the year
(101,134
)
 
71,075

 
(1,909
)
 
1,991

Prior service cost recognized due to curtailment
—

 
2,075

 
—

 
—

Net actuarial losses recognized due to curtailment
—

 
54,455

 
—

 
—

Settlements
—

 
20,156

 
—

 
—

Balance at end of year
$
(176,171
)
 
$
(77,906
)
 
$
(4,056
)
 
$
(2,123
)

(1) The fair value of plan assets as of December 31, 2013 reflects distributions of $15,817 paid in 2014 related to the Company's voluntary early retirement program.
(2)
Included in the consolidated balance sheets in pensions and other benefits and other post-retirement benefits are international plans.
(3)
Represents amounts in accumulated other comprehensive loss that have not yet been recognized as components of net periodic benefit cost.
Schedule of Net Benefit Costs
 
Pension Benefits
 
Other Benefits
 
2014
 
2013
 
2012
 
2014
 
2013
 
2012
Components of net periodic benefit cost
 
 
 
 
 
 
 
 
 
 
Service cost
$
2,924

 
$
11,616

 
$
11,446

 
$
—

 
$
—

 
$
—

Interest cost
22,999

 
27,597

 
31,831

 
627

 
628

 
814

Expected return on plan assets
(25,798
)
 
(35,746
)
 
(40,821
)
 
—

 
—

 
—

Amortization of prior service cost (1)
(156
)
 
(313
)
 
258

 
(226
)
 
(488
)
 
(517
)
Recognized net actuarial loss
3,025

 
14,469

 
16,777

 
202

 
423

 
488

Curtailment loss
—

 
10,672

 
—

 
—

 
—

 
—

Settlement loss
—

 
20,156

 
21,907

 
—

 
—

 
—

Special termination benefits
—

 
38,733

 
—

 
—

 
—

 
—

Net periodic benefit cost
$
2,994

 
$
87,184

 
$
41,398

 
$
603

 
$
563

 
$
785

(1)
The annual amortization of prior service cost is determined as the increase in projected benefit obligation due to the plan change divided by the average remaining service period of participating employees expected to receive benefits under the plan.
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets
The following table represents information for pension plans with an accumulated benefit obligation in excess of plan assets at December 31:
 
2014
 
2013
Projected benefit obligation
$
578,003

 
$
455,009

Accumulated benefit obligation
$
577,639

 
$
454,681

Fair value of plan assets
$
364,205

 
$
332,543
Schedule of Assumptions Used
The following table represents the weighted-average assumptions used to determine benefit obligations at December 31:
 
Pension Benefits
 
Other Benefits
 
2014
 
2013
 
2014
 
2013
Discount rate
4.21
%
 
5.09
%
 
4.21
%
 
5.09
%
Rate of compensation increase
N/A

 
N/A

 
N/A

 
N/A


The following table represents the weighted-average assumptions used to determine periodic benefit cost at December 31:
 
Pension Benefits
 
Other Benefits
 
2014
 
2013
 
2014
 
2013
Discount rate
5.09
%
 
4.21
%
 
5.09
%
 
4.21
%
Expected long-term return on plan assets
7.95
%
 
8.05
%
 
N/A

 
N/A

Rate of compensation increase
N/A

 
3.25
%
 
N/A

 
N/A
Schedule of Health Care Cost Trend Rates
The following table represents assumed healthcare cost trend rates at December 31:
 
2014
 
2013
Healthcare cost trend rate assumed for next year
7.5
%
 
7.5
%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)
5.0
%
 
5.0
%
Year that rate reaches ultimate trend rate
2020

 
2019
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates
A one-percentage-point change in assumed healthcare cost trend rates would have the following effects:
 
One-Percentage-Point Increase
 
One-Percentage-Point Decrease
Effect on total of service and interest cost
$
34

 
$
(32
)
Effect on post-retirement benefit obligation
$
928

 
$
(836
)
Schedule of Allocation of Plan Assets
The following table summarizes the Company’s target mix for these asset classes in 2015, which are readjusted at least quarterly within a defined range, and the Company’s actual pension plan asset allocation as of December 31, 2014 and 2013:
 
 
Target Allocation
Percentage
 
Actual Allocation Percentage
 
 
2015
 
2014
 
2013
Equity securities
 
45%
 
45%
 
41%
Debt securities
 
40%
 
40%
 
33%
Real estate
 
5%
 
5%
 
8%
Other
 
10%
 
10%
 
18%
Total
 
100%
 
100%
 
100%
The following table summarizes the fair value of the Company’s plan assets as of December 31, 2014:
 
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
Cash and other
 
$
3,883

 
$
3,883

 
$
—

 
$
—

Mutual funds:
 
 
 
 
 
 
 
 
Balanced fund
 
15,291

 
15,291

 
—

 
—

Equity securities:
 
 
 
 
 
 
 
 
U.S. mid cap value
 
13,949

 
13,949

 
—

 
—

U.S. small cap core
 
18,477

 
18,477

 
—

 
—

International developed markets
 
33,875

 
33,875

 
—

 
—

Fixed income securities:
 
 
 
 
 
 
 
 
U.S. corporate bonds
 
51,671

 
—

 
51,671

 
—

International corporate bonds
 
217

 
—

 
217

 
—

U.S. government
 
1,948

 
—

 
1,948

 
—

Other fixed income
 
271

 
—

 
271

 
—

Emerging markets
 
16,730

 
—

 
16,730

 
—

Common collective trusts:
 
 
 
 
 
 
 
 
Real estate (a)
 
16,768

 
—

 
—

 
16,768

Other (b)
 
153,753

 
—

 
153,753

 
—

Alternative investments:
 
 
 
 
 
 
 
 
Multi-strategy hedge funds (c)
 
16,593

 
—

 
—

 
16,593

Private equity funds (d)
 
20,779

 
—

 
—

 
20,779

Fair value of plan assets at end of year
 
$
364,205

 
$
85,475

 
$
224,590

 
$
54,140


The following table summarizes the fair value of the Company’s plan assets as of December 31, 2013:
 
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
Cash and other
 
$
20,884

 
$
20,884

 
$
—

 
$
—

Mutual funds:
 
 
 
 
 
 
 
 
Balanced fund
 
13,477

 
13,477

 
—

 
—

Equity securities:
 
 
 
 
 
 
 
 
U.S. mid cap value
 
12,325

 
12,325

 
—

 
—

U.S. small cap core
 
15,368

 
15,368

 
—

 
—

International developed markets
 
30,327

 
30,327

 
—

 
—

Fixed income securities:
 
 
 
 
 
 
 
 
U.S. corporate bonds
 
37,414

 
—

 
37,414

 
—

International corporate bonds
 
850

 
—

 
850

 
—

U.S. government
 
3,358

 
—

 
3,358

 
—

Other fixed income
 
893

 
—

 
893

 
—

Emerging markets
 
14,335

 
—

 
14,335

 
—

Common collective trusts:
 
 
 
 
 
 
 
 
Real estate (a)
 
29,162

 
—

 
—

 
29,162

Other (b)
 
139,720

 
—

 
139,720

 
—

Alternative investments:
 
 
 
 
 
 
 
 
Multi-strategy hedge funds (c)
 
22,637

 
—

 
—

 
22,637

Private equity funds (d)
 
21,627

 
—

 
—

 
21,627

Fair value of plan assets at end of year, prior to reduction for anticipated distributions
 
$
362,377

 
$
92,381

 
$
196,570

 
$
73,426

Distributions paid in 2014
 
(15,817
)
 
 
 
 
 
 
Fair value of plan assets at end of year
 
$
346,560

 
 
 
 
 
 

(a)
Real estate common collective trust The objective of the real estate common collective trust (CCT) is to achieve long-term returns through investments in a broadly diversified portfolio of improved properties with stabilized occupancies. As of December 31, 2014, investments in this CCT included approximately 44 percent office, 21 percent residential, 24 percent retail and 11 percent industrial, cash and other. As of December 31, 2013 investments in this CCT included approximately 45 percent office, 23 percent residential, 18 percent retail and 14 percent industrial, cash and other. Investments in the real estate CCT can be redeemed once per quarter subject to available cash, with a 45-day notice.

(b)
Other common collective trusts At December 31, 2014, approximately 58 percent of the other CCTs are invested in fixed income securities including approximately 27 percent in mortgage-backed securities, 47 percent in corporate bonds and 26 percent in U.S. Treasury and other. Approximately 42 percent of the other CCTs at December 31, 2014 are invested in Russell 1000 Fund large cap index funds. At December 31, 2013, approximately 54 percent of the other CCTs are invested in fixed-income securities including approximately 29 percent in mortgage-backed securities, 42 percent in corporate bonds and 29 percent in U.S. Treasury and other. Approximately 46 percent of the other CCTs at December 31, 2013 are invested in Russell 1000 Fund large cap index funds. Investments in fixed-income securities can be redeemed daily.

(c)
Multi-strategy hedge funds The objective of the multi-strategy hedge funds is to diversify risks and reduce volatility. At December 31, 2014 and 2013, investments in this class include approximately 44 percent and 35 percent long/short equity, respectively, 44 percent and 45 percent arbitrage and event investments, respectively, and 10 percent and 20 percent in directional trading, fixed income and other, respectively. Investments in the multi-strategy hedge fund can be redeemed semi-annually with a 95-day notice.

(d)
Private equity funds The objective of the private equity funds is to achieve long-term returns through investments in a diversified portfolio of private equity limited partnerships that offer a variety of investment strategies, targeting low volatility and low correlation to traditional asset classes. As of December 31, 2014 and 2013, investments in these private equity funds include approximately 50 percent, in both years, in buyout private equity funds that usually invest in mature companies with established business plans, 25 percent in both years, in special situations private equity and debt funds that focus on niche investment strategies and 25 percent in both years, in venture private equity funds that invest in early development or expansion of business. Investments in the private equity fund can be redeemed only with written consent from the general partner, which may or may not be granted. At December 31, 2014 and 2013, the Company had unfunded commitments of underlying funds of $5,529 in both years.
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets
The following table summarizes the changes in fair value of level 3 assets for the years ended December 31:
 
 
2014
 
2013
Balance, January 1
 
$
73,426

 
$
76,883

Dispositions
 
(26,167
)
 
(12,850
)
Realized and unrealized gain, net
 
6,881

 
9,393

Balance, December 31
 
$
54,140

 
$
73,426
Schedule of Amounts Expected To Be Recognized in Other Comprehensive Income (Loss)
The following table represents the amortization amounts expected to be recognized during 2015:
 
Pension Benefits
 
Other Benefits
Amount of net prior service credit
$
7

 
$
(159
)
Amount of net loss
$
6,514

 
$
326
Schedule of Expected Benefit Payments
The following benefit payments, which reflect expected future service, are expected to be paid:
 
Pension Benefits
 
Other Benefits
 
Other Benefits
after Medicare
Part D Subsidy
2015
$
26,830

 
$
1,533

 
$
1,390

2016
$
27,071

 
$
1,505

 
$
1,366

2017
$
27,366

 
$
1,473

 
$
1,337

2018
$
27,967

 
$
1,425

 
$
1,294

2019
$
28,439

 
$
1,367

 
$
1,241

2020-2024
$
152,422

 
$
5,936

 
$
5,399
Schedule of Defined Contribution Plan, Employer Matching Contribution
The following table represents the Company's basic match percentage on participant qualified contributions up to a percentage of their compensation:
 
Employees hired prior
to July 1, 2003
 
Employees hired on
or after July 1, 2003
Effective January 1, 2012 - December 31, 2013
30% of first 6%
 
60% of first 6%
Effective January 1, 2014 - December 31, 2014
60% of first 6%
 
60% of first 6%