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Accumulated Other Comprehensive Income (Tables)
 9 Months Ended
Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
       Changes in Accumulated Other Comprehensive Income (Loss) (net of tax) by component are presented below (in thousands):
 
 
 
Three Months Ended September 30, 2014
 
Three Months Ended September 30, 2013
 
 
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
$
(9,539
)
 
$
39,483

 
$
(12,214
)
 
$
17,730

 
$
(74,198
)
 
$
26,030

 
$
(12,429
)
 
$
(60,597
)
 
Other comprehensive income before reclassifications
—

 
733

 
—

 
733

 
—

 
3,463

 
—

 
3,463

 
Amounts reclassified from accumulated other comprehensive income (loss)
(279
)
 
(691
)
 
68

 
(902
)
 
1,065

 
(158
)
 
65

 
972

Balance at end of period
$
(9,818
)
 
$
39,525

 
$
(12,146
)
 
$
17,561

 
$
(73,133
)
 
$
29,335

 
$
(12,364
)
 
$
(56,162
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2014
 
Nine Months Ended September 30, 2013
 
 
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
$
(21,330
)
 
$
36,240

 
$
(12,298
)
 
$
2,612

 
$
(75,737
)
 
$
22,194

 
$
(12,541
)
 
$
(66,084
)
 
Other comprehensive income before reclassifications
12,147

 
6,377

 
—

 
18,524

 
—

 
7,383

 
—

 
7,383

 
Amounts reclassified from accumulated other comprehensive income (loss)
(635
)
 
(3,092
)
 
152

 
(3,575
)
 
2,604

 
(242
)
 
177

 
2,539

Balance at end of period
$
(9,818
)
 
$
39,525

 
$
(12,146
)
 
$
17,561

 
$
(73,133
)
 
$
29,335

 
$
(12,364
)
 
$
(56,162
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Twelve Months Ended September 30, 2014
 
Twelve Months Ended September 30, 2013
 
 
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
$
(73,133
)
 
$
29,335

 
$
(12,364
)
 
$
(56,162
)
 
$
(75,403
)
 
$
23,994

 
$
(12,626
)
 
$
(64,035
)
 
Other comprehensive income (loss) before reclassifications
63,518

 
13,476

 
—

 
76,994

 
(1,331
)
 
5,492

 
—

 
4,161

 
Amounts reclassified from accumulated other comprehensive income (loss)
(203
)
 
(3,286
)
 
218

 
(3,271
)
 
3,601

 
(151
)
 
262

 
3,712

Balance at end of period
$
(9,818
)
 
$
39,525

 
$
(12,146
)
 
$
17,561

 
$
(73,133
)
 
$
29,335

 
$
(12,364
)
 
$
(56,162
)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Amounts reclassified from accumulated other comprehensive income (loss) for the three, nine and twelve months ended September 30, 2014 and 2013 are as follows ( in thousands):

Details about Accumulated Other Comprehensive Income (Loss) Components
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
Twelve Months Ended September 30,
 
Affected Line Item in the Statement of Operations
 
2014
 
2013
 
2014
 
2013
 
2014
 
2013
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of pension and postretirement benefit costs:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Prior service benefit
 
$
2,065

 
1,369

 
$
5,594

 
4,169

 
$
6,985

 
$
5,610

 
(a)
 
Net loss
 
(1,615
)
 
(2,903
)
 
(4,567
)
 
(8,323
)
 
(6,716
)
 
(11,316
)
 
(a)
 
 
 
 
450

 
(1,534
)
 
1,027

 
(4,154
)
 
269

 
(5,706
)
 
(a)
 
Income tax effect
 
(171
)
 
469

 
(392
)
 
1,550

 
(66
)
 
2,105

 
 
 
 
 
 
279

 
(1,065
)
 
635

 
(2,604
)
 
203

 
(3,601
)
 
(a)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net realized gain on sale of securities
 
824

 
199

 
3,791

 
287

 
4,057

 
474

 
Investment and interest income, net
 
Unrealized losses on available-for-sale securities included in pre-tax income
 
—

 
—

 
—

 
—

 
—

 
(313
)
 
Investment and interest income, net
 
 
 
 
824

 
199

 
3,791

 
287

 
4,057

 
161

 
Income before income taxes
 
Income tax effect
 
(133
)
 
(41
)
 
(699
)
 
(45
)
 
(771
)
 
(10
)
 
Income tax expense
 
 
 
 
691

 
158

 
3,092

 
242

 
3,286

 
151

 
Net income
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Loss on cash flow hedge:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of loss
 
(110
)
 
(104
)
 
(326
)
 
(306
)
 
(431
)
 
(405
)
 
Interest on long-term debt and revolving credit facility
 
 
 
 
(110
)
 
(104
)
 
(326
)
 
(306
)
 
(431
)
 
(405
)
 
Income before income taxes
 
Income tax effect
 
42

 
39

 
174

 
129

 
213

 
143

 
Income tax expense
 
 
 
 
(68
)
 
(65
)
 
(152
)
 
(177
)
 
(218
)
 
(262
)
 
Net income
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications
 
$
902

 
$
(972
)
 
$
3,575

 
$
(2,539
)
 
$
3,271

 
$
(3,712
)
 
 
 
 
(a) These items are included in the computation of net periodic benefit cost. See Note I, Employee Benefits, for additional information.