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CWP and Workers Comp (Tables)
 12 Months Ended
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]
 
 
 
 
Other
 
 
Pension
 
Postretirement
 
 
Benefits
 
Benefits
Prior Service (credit) recognition
 
$
(1,384
)
 
$
(8,784
)
Actuarial loss recognition
 
$
23,564

 
$
25,474
Schedule of Assumptions Used [Table Text Block]

The weighted-average assumptions used to determine benefit obligations are as follows:
 
 
Pension Benefits
 
Other Postretirement Benefits
 
 
For the Year Ended
 
For the Year Ended
 
 
December 31,
 
December 31,
 
 
2013
 
2012
 
2013
 
2012
Discount rate
 
4.87
%
 
4.00
%
 
4.88
%
 
4.05
%
Rate of compensation increase
 
4.23
%
 
3.77
%
 
—

 
—


The discount rates are determined using a Company-specific yield curve model (above-mean) developed with the assistance of an external actuary. The Company-specific yield curve models (above-mean) use a subset of the expanded bond universe to determine the Company-specific discount rate.  Bonds used in the yield curve are rated AA by Moody's or Standard & Poor's as of the measurement date. The yield curve models parallel the plans' projected cash flows, and the underlying cash flows of the bonds included in the models exceed the cash flows needed to satisfy the Company plans'.

The weighted-average assumptions used to determine net periodic benefit costs are as follows:
 
 
Pension Benefits at
 
Other Postretirement Benefits at
 
 
December 31,
 
December 31,
 
 
2013
 
2012
 
2011
 
2013
 
2012
 
2011
Discount rate
 
4.00
%
 
4.50
%
 
5.30
%
 
4.05
%
 
4.51
%
 
5.33
%
Expected long-term return on plan assets
 
7.75
%
 
8.00
%
 
8.00
%
 
—

 
—

 
—

Rate of compensation increase
 
3.77
%
 
3.82
%
 
3.66
%
 
—

 
—

 
—
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

Assumed discount rates also have a significant effect on the amounts reported for both pension and other benefit costs. A one-quarter percentage point change in assumed discount rate would have the following effect on benefit costs:
 
 
0.25 Percentage
 
0.25 Percentage
 
 
Point Increase
 
Point Decrease
Pension benefit costs (decrease) increase
 
$
(1,797
)
 
$
1,798

Other postemployment benefits costs (decrease) increase
 
$
(3,690
)
 
$
3,830
Schedule of Expected Benefit Payments [Table Text Block]
The following benefit payments, reflecting expected future service, are expected to be paid:
Workers Comp and CWP [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Accumulated and Projected Benefit Obligations [Table Text Block]
 
 
CWP
 
Workers' Compensation
 
 
at December 31,
 
at December 31,
 
 
2013
 
2012
 
2013
 
2012
Change in benefit obligation:
 
 
 
 
 
 
 
 
Benefit obligation at beginning of period
 
$
184,079

 
$
183,580

 
$
179,589

 
$
174,069

State administrative fees and insurance bond premiums
 
—

 
—

 
5,324

 
6,727

Service, legal and administrative cost
 
8,168

 
7,711

 
15,943

 
17,126

Interest cost
 
7,031

 
7,964

 
6,401

 
7,113

Actuarial (gain) loss
 
(18,020
)
 
(3,919
)
 
11,806

 
6,754

Benefits paid
 
(10,423
)
 
(11,257
)
 
(28,659
)
 
(32,200
)
Settlements
 
(49,652
)
 
—

 
(105,308
)
 
—

Benefit obligation at end of period
 
$
121,183

 
$
184,079

 
$
85,096

 
$
179,589

 
 
 
 
 
 
 
 
 
Current liabilities
 
$
(9,212
)
 
$
(8,838
)
 
$
(13,628
)
 
$
(9,176
)
Noncurrent liabilities
 
(111,971
)
 
(114,136
)
 
(71,468
)
 
(60,396
)
Liabilities of discontinued operations
 
—

 
(61,105
)
 
—

 
(110,017
)
Net obligation recognized
 
$
(121,183
)
 
$
(184,079
)
 
$
(85,096
)
 
$
(179,589
)
 
 
 
 
 
 
 
 
 
Amounts recognized in accumulated other comprehensive income consist of:
 
 
 
 
 
 
 
 
Net actuarial gain
 
$
(80,363
)
 
$
(148,955
)
 
$
(13,569
)
 
$
(44,535
)
Net amount recognized (before tax effect)
 
$
(80,363
)
 
$
(148,955
)
 
$
(13,569
)
 
$
(44,535
)
Schedule of Net Benefit Costs [Table Text Block]

The components of the net periodic cost (credit) are as follows:
 
 
CWP
 
Workers’ Compensation
 
For the Years Ended
 
For the Years Ended
 
December 31,
 
December 31,
 
2013
 
2012
 
2011
 
2013
 
2012
 
2011
Service cost
$
8,168

 
$
7,711

 
$
7,620

 
$
15,943

 
$
17,126

 
$
20,015

Interest cost
7,031

 
7,964

 
9,330

 
6,401

 
7,113

 
8,238

Amortization of prior service cost
—

 
(395
)
 
(728
)
 
—

 
—

 
—

Recognized net actuarial gain
(16,384
)
 
(19,338
)
 
(21,182
)
 
(2,630
)
 
(3,944
)
 
(3,907
)
State administrative fees and insurance bond premiums
—

 
—

 
—

 
5,324

 
6,727

 
7,035

Settlement gain
(119,881
)
 
—

 
—

 
(121,838
)
 
—

 
—

Net periodic cost (credit)
$
(121,066
)
 
$
(4,058
)
 
$
(4,960
)
 
$
(96,800
)
 
$
27,022

 
$
31,381
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]
Amounts included in accumulated other comprehensive income, expected to be recognized in 2014 net periodic benefit costs:
 
 
 
 
Workers'
 
 
CWP
 
Compensation
 
 
Benefits
 
Benefits
Prior Service benefit recognition
 
$
—

 
$
—

Actuarial gain recognition
 
$
(6,196
)
 
$
(382
)
Schedule of Assumptions Used [Table Text Block]
Assumptions:
The weighted-average discount rates used to determine benefit obligations and net periodic (benefit) cost are as follows:
 
 
CWP
 
Workers' Compensation
 
 
For the Years Ended
 
For the Years Ended
 
 
December 31,
 
December 31,
 
 
2013

 
2012

 
2011

 
2013

 
2012

 
2011

Benefit obligations
 
4.75
%
 
4.03
%
 
4.46
%
 
4.57
%
 
3.95
%
 
4.40
%
Net periodic (benefit) cost
 
4.03
%
 
4.46
%
 
5.21
%
 
3.95
%
 
4.40
%
 
5.13
%
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]
Assumed discount rates have a significant effect on the amounts reported for both CWP benefits and Workers' Compensation costs. A one-quarter percentage point change in assumed discount rate would have the following effect on benefit costs:

 
 
0.25 Percentage
 
0.25 Percentage
 
 
Point Increase
 
Point Decrease
CWP benefit increase (decrease)
 
$
585

 
$
(530
)
Workers' Compensation costs (decrease) increase
 
$
(379
)
 
$
398
Schedule of Expected Benefit Payments [Table Text Block]
The following benefit payments, which reflect expected future claims as appropriate, are expected to be paid:
 
 
 
 
 
Workers' Compensation
 
 
CWP
 
Total
 
Actuarial
 
Other
 
 
Benefits
 
Benefits
 
Benefits
 
Benefits
2014

 
$
9,211

 
$
18,635

 
$
13,628

 
$
5,007

2015

 
$
9,204

 
$
18,479

 
$
13,347

 
$
5,132

2016

 
$
9,185

 
$
18,602

 
$
13,341

 
$
5,261

2017

 
$
9,163

 
$
18,815

 
$
13,423

 
$
5,392

2018

 
$
9,156

 
$
19,000

 
$
13,473

 
$
5,527

Year 2019-2023

 
$
45,090

 
$
99,249

 
$
69,471

 
$
29,778