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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current [Abstract]        
Federal   $ 48,287 $ 34,170 $ 14,312
State   5,648 3,854 1,885
Foreign   2,214 81 0
Total   56,149 38,105 16,197
Deferred [Abstract]        
Federal   42,003 21,972 15,632
State   5,523 3,048 1,887
Foreign   167 25 0
Total   47,693 25,045 17,519
Change in valuation allowance   335 (21) (271,393)
Provision for income taxes   104,177 63,129 (237,677)
Deferred tax assets [Abstract]        
Goodwill and intangible assets   74,992 125,457  
Accrued expenses   24,263 26,606  
Deferred revenue   4,413 3,503  
Inventories   4,483 2,544  
Pension obligations   4,043 9,064  
Stock-based compensation   6,609 6,408  
Operating loss and credit carryforwards   976 24,915  
Interest rate swaps   0 1,119  
Other   2,089 36  
Valuation allowance   (1,021) (806)  
Total deferred tax assets   120,847 198,846  
Deferred tax liabilities [Abstract]        
Depreciation   15,163 12,274  
Debt refinancing costs   7,494 0  
Prepaid expenses   1,183 1,131  
Total deferred tax liabilities   23,840 13,405  
Net deferred tax asset   97,007 185,441  
Net current and noncurrent components of deferred taxes [Abstract]        
Net current deferred tax assets   26,869 48,687  
Net long-term deferred tax assets   86,125 137,560  
Net long-term deferred tax liabilities   (14,966) 0  
Valuation allowance   (1,021) (806)  
Net deferred tax asset   97,007 185,441  
Period of cumulative net loss positions   3 years    
Tax benefit on reversal of valuation allowance 271,393      
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]        
U.S. statutory rate (in hundredths)   35.00% 35.00% 35.00%
State taxes (in hundredths)   3.70% 4.10% 4.00%
Valuation allowance (in hundredths)   0.20% 0.00% (312.30%)
Other (in hundredths)   (1.50%) 1.30% 0.00%
Effective income tax rates (in hundredths)   37.40% 40.40% (273.30%)
Uncertain tax positions reserves   0 0  
Undistributed earnings   8,666    
State [Member]
        
Operating Loss Carryforwards [Line Items]        
Expiration of operating loss carryforward   2023 and 2025    
State net operating loss carryforwards   $ 10