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Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2013
Accumulated Other Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
       In February 2013, the FASB issued new guidance, ASU 2013-02, Comprehensive Income (Topic 220) as discussed above. This guidance requires disclosures regarding changes in Accumulated Other Comprehensive Loss (net of tax) by component which are presented below (in thousands):
 
 
 
 
 
 
 
Three Months Ended March 31, 2013
 
 
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Loss
 
 
 
 
 
 
 
 
 
 
Balance at December 31, 2012
$
22,194

 
$
(75,737
)
 
$
(12,541
)
 
$
(66,084
)
 
Other comprehensive income before reclassifications
5,543

 
—

 
—

 
5,543

 
Amounts reclassified from accumulated other comprehensive loss
121

 
705

 
49

 
875

Balance at March 31, 2013
$
27,858

 
$
(75,032
)
 
$
(12,492
)
 
$
(59,666
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Twelve Months Ended March 31, 2013
 
 
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Unrecognized Pension and Postretirement Benefit Costs
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Loss
 
 
 
 
 
 
 
 
 
 
Balance at March 31, 2012
$
20,049

 
$
(77,246
)
 
$
(12,746
)
 
$
(69,943
)
 
Other comprehensive income (loss) before reclassifications
6,695

 
(1,264
)
 
—

 
5,431

 
Amounts reclassified from accumulated other comprehensive loss
1,114

 
3,478

 
254

 
4,846

Balance at March 31, 2013
$
27,858

 
$
(75,032
)
 
$
(12,492
)
 
$
(59,666
)
Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Amounts reclassified from accumulated other comprehensive loss for the three and twelve months ended March 31, 2013 are as follows ( in thousands):

Details about Accumulated Other Comprehensive Income (Loss) Components
 
Three Months Ended March 31, 2013
 
Twelve Months Ended March 31, 2013
 
Affected Line Item in the Statement of Operations
 
 
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
Net realized loss on sale of securities
 
$
(158
)
 
$
(934
)
 
Investment and interest income, net
 
Unrealized losses on available-for-sale securities included in pre-tax income
 
—

 
(479
)
 
Investment and interest income, net
 
 
 
 
(158
)
 
(1,413
)
 
Total before tax
 
 
 
 
37

 
299

 
Income tax expense
 
 
 
 
(121
)
 
(1,114
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Amortization of pension and postretirement benefit costs:
 
 
 
 
 
 
 
Prior service benefit
 
1,400

 
5,719

 
(a)
 
Net loss
 
(2,675
)
 
(11,521
)
 
(a)
 
 
 
 
(1,275
)
 
(5,802
)
 
Total before tax
 
 
 
 
570

 
2,324

 
Income tax expense
 
 
 
 
(705
)
 
(3,478
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Loss on cash flow hedge:
 
 
 
 
 
 
 
Amortization of loss
 
(101
)
 
(392
)
 
Interest on long-term debt and revolving credit facility
 
 
 
 
(101
)
 
(392
)
 
Total before tax
 
 
 
 
52

 
138

 
Income tax expense
 
 
 
 
(49
)
 
(254
)
 
Net of tax
 
 
 
 
 
 
 
 
 
 
Total reclassifications
 
$
(875
)
 
$
(4,846
)
 
Net of tax