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Savings, Pension and Other Postretirement Employee Benefit Plans Additional Information (Details) (USD $)
 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
IAM
Dec. 31, 2012
IAM
Dec. 31, 2011
IAM
Nov. 30, 2011
USW
Oct. 31, 2011
USW
Dec. 31, 2013
Maximum
Plan A [Member]
Dec. 31, 2013
Maximum
Plan B [Member]
Dec. 31, 2013
Minimum
Plan B [Member]
Dec. 31, 2013
Minimum
Plan C [Member]
Dec. 31, 2011
Pension Benefit Plans
Dec. 31, 2013
Pension Benefit Plans
Dec. 31, 2012
Pension Benefit Plans
Dec. 31, 2011
Pension Benefit Plans
Dec. 31, 2013
Other Postretirement Employee Benefit Plans
Dec. 31, 2012
Other Postretirement Employee Benefit Plans
Dec. 31, 2011
Other Postretirement Employee Benefit Plans
Dec. 31, 2013
Other Postretirement Employee Benefit Plans
Maximum
Dec. 31, 2013
Other Postretirement Employee Benefit Plans
Minimum
Dec. 31, 2013
Company-Sponsored Pension Plans
Dec. 31, 2013
Non Qualified Pension Plans
Dec. 31, 2013
Fair Value, Inputs, Level 1
Other Postretirement Employee Benefit Plans
Dec. 31, 2013
Employer 401 (k) Matching Contribution [Member]
Dec. 31, 2012
Employer 401 (k) Matching Contribution [Member]
Dec. 31, 2011
Employer 401 (k) Matching Contribution [Member]
Dec. 31, 2013
Cost of Sales [Member]
Dec. 31, 2013
Selling, General and Administrative Expenses [Member]
Dec. 31, 2013
Minimum Contributions, Total [Member]
Company-Sponsored Pension Plans
Dec. 31, 2013
Minimum Contributions, Required by Actuary [Member]
Company-Sponsored Pension Plans
Dec. 31, 2013
Minimum Contributions, Requirement of Previous Arrangement [Member]
Company-Sponsored Pension Plans
Defined Benefit Plan Disclosure [Line Items]                                                                
Funded Percentage Of Pension Protection Plan                 65.00% 80.00% 65.00% 80.00%                                        
Employer contributions                                                 $ 16,800,000 $ 14,900,000 $ 8,100,000          
Curtailments                           769,000 477,000 2,776,000 0 0 0                          
Loss related to plan changes in Net Periodic Benefit Cost 9,098,000 7,324,000 4,869,000                                                          
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax                         400,000                                      
Net loss expected to be recognized as component of net periodic benfit over the next fiscal year                           10,000,000                                    
Prior service cost, expected to be recognized as a component of net periodic benefit cost over the next fiscal year                             200,000   500,000                              
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax                                                       14,200,000 3,300,000      
Medicare Part D subsidies received                           0 0   308,000 569,000                            
Assumed health care cost trend rates used to determine the company's benefit obligations and expense                                 7.70%                              
Assumed health care cost trend rates, graded rate                                       4.60% 4.30%                      
Expected year when trend rate to be reached                                 70 years                              
Securities lending agreement, percentage of market value of loaned securities and accrued interest                                 102.00%                              
Value of corporate common stocks loaned under the lending agreement                                 300,000                              
Fair value of plan assets 286,598,000 254,556,000                     218,557,000 286,598,000 254,556,000 218,557,000 20,000 19,000 18,000         20,000                
Funded status at end of year                           6,790,000 78,701,000   107,307,000 134,599,000                            
Employer contribution                           15,386,000 20,882,000   0 0       15,100,000 300,000                  
Estimated cash contributions in next fiscal year                                                           $ 15,000,000 $ 8,000,000 $ 7,000,000
Contribution rates       4.0 3.25 3 2.6714 2.4285