XML 45 R47.htm IDEA: XBRL DOCUMENT v2.4.0.6
Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
A
Dec. 31, 2010
Dec. 31, 2009
Summary Of Significant Accounting Policies [Line Items]      
Number of joint ventures accounted for under equity method 1    
Customer returns, allowances and earned discounts as a percentage of gross selling price 1.00%    
Reserve for customer accounts receivable, percentage 1.00%    
Allowance for doubtful accounts $ 1,900,000 $ 2,500,000  
Reserve for customer deductions 3,100,000 2,900,000  
Inventories valued using the LIFO method, amount 197,300,000 199,500,000  
Inventory values before LIFO inventory reserve 324,031,000 309,226,000  
Interest capitalization, construction in progress 7,100,000 4,800,000 900,000
Depreciation expense 161,500,000 154,000,000 148,200,000
Amortization period of customer lists and relationships, minimum, in years 6    
Amortization period of customer lists and relationships, maximum, in years 40    
Goodwill 58,214,000 38,854,000  
Unamortized deferred financing costs 2,600,000 1,300,000  
Area leased under timberland cutting rights (acres) 88,000    
Long-term lease costs capitalization 26,200,000 24,500,000  
Depletion expense 40,000 500,000 1,200,000
Net capitalized software costs 1,900,000 1,500,000  
Software amortization expense 600,000 600,000 500,000
Research and development costs 12,500,000 10,900,000 9,400,000
Interest income included in net interest expense 20,000 40,000 100,000
Amortization of the net gain on treasury lock settlements $ (1,846,000) $ (1,846,000) $ (1,846,000)
Percent of net sales threshold used to determine major customers 10.00%    
Minimum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Term of senior credit facilities and notes, in years 5    
Maximum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Term of senior credit facilities and notes, in years 10