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Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Schedule of Accumulated Other Comprehensive Income (Loss)
       Changes in Accumulated Other Comprehensive Income (Loss) (net of tax) by component are presented below (in thousands):
 
 
 
Three Months Ended March 31, 2017
 
Three Months Ended March 31, 2016
 
 
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Post-retirement 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
$
(23,928
)
 
$
28,463

 
$
(11,651
)
 
$
(7,116
)
 
$
(29,869
)
 
$
27,765

 
$
(11,810
)
 
$
(13,914
)
 
Other comprehensive income before reclassifications
—

 
6,165

 
—

 
6,165

 
—

 
1,742

 
—

 
1,742

 
Amounts reclassified from accumulated other comprehensive income (loss)
(529
)
 
(1,756
)
 
52

 
(2,233
)
 
(387
)
 
(1,113
)
 
40

 
(1,460
)
Balance at end of period
$
(24,457
)
 
$
32,872

 
$
(11,599
)
 
$
(3,184
)
 
$
(30,256
)
 
$
28,394

 
$
(11,770
)
 
$
(13,632
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Twelve Months Ended March 31, 2017
 
Twelve Months Ended March 31, 2016
 
 
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Post-retirement 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
$
(30,256
)
 
$
28,394

 
$
(11,770
)
 
$
(13,632
)
 
$
(34,628
)
 
$
36,782

 
$
(12,032
)
 
$
(9,878
)
 
Other comprehensive income (loss) before reclassifications
7,363

 
11,327

 
—

 
18,690

 
3,777

 
(1,335
)
 
—

 
2,442

 
Amounts reclassified from accumulated other comprehensive income (loss)
(1,564
)
 
(6,849
)
 
171

 
(8,242
)
 
595

 
(7,053
)
 
262

 
(6,196
)
Balance at end of period
$
(24,457
)
 
$
32,872

 
$
(11,599
)
 
$
(3,184
)
 
$
(30,256
)
 
$
28,394

 
$
(11,770
)
 
$
(13,632
)
Reclassification out of Accumulated Other Comprehensive Income
Amounts reclassified from Accumulated Other Comprehensive Income (Loss) for the three and twelve months ended March 31, 2017 and 2016 are as follows (in thousands):
Details about Accumulated Other Comprehensive Income (Loss) Components
 
Three Months Ended March 31,
 
Twelve Months Ended March 31,
 
Affected Line Item in the Statement of Operations
 
2017
 
2016
 
2017
 
2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of pension and post-retirement benefit costs:
 
 
 
 
 
 
 
 
 
 
 
Prior service benefit
 
$
2,416

 
$
1,666

 
$
8,157

 
$
6,577

 
(a)
 
Net loss
 
(1,694
)
 
(1,223
)
 
(5,436
)
 
(7,595
)
 
(a)
 
 
 
 
722

 
443

 
2,721

 
(1,018
)
 
(a)
 
Income tax effect
 
(193
)
 
(56
)
 
(1,157
)
 
423

 
Income tax expense (benefit)
 
 
 
 
529

 
387

 
1,564

 
(595
)
 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
 
 
 
 
Net realized gain on sale of securities
 
2,191

 
1,388

 
8,443

 
8,757

 
Investment and interest income, net
 
 
 
 
2,191

 
1,388

 
8,443

 
8,757

 
Income before income taxes
 
Income tax effect
 
(435
)
 
(275
)
 
(1,594
)
 
(1,704
)
 
Income tax expense (benefit)
 
 
 
 
1,756

 
1,113

 
6,849

 
7,053

 
Net income
 
 
 
 
 
 
 
 
 
 
 
 
 
Loss on cash flow hedge:
 
 
 
 
 
 
 
 
 
 
 
Amortization of loss
 
(130
)
 
(122
)
 
(506
)
 
(475
)
 
Interest on long-term debt and revolving credit facility
 
 
 
 
(130
)
 
(122
)
 
(506
)
 
(475
)
 
Income (loss) before income taxes
 
Income tax effect
 
78

 
82

 
335

 
213

 
Income tax expense
 
 
 
 
(52
)
 
(40
)
 
(171
)
 
(262
)
 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications
 
$
2,233

 
$
1,460

 
$
8,242

 
$
6,196

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