XML 47 R47.htm IDEA: XBRL DOCUMENT v2.4.0.6
Summary of Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
acre
Dec. 31, 2011
Dec. 31, 2010
Significant Accounting Policies [Line Items]      
Number of joint ventures under equity method 2    
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 $ 1,900,000  
Reserve for customer deductions 3,400,000 3,100,000  
Inventories valued using the LIFO method, amount 194,000,000 197,300,000  
Inventory values before LIFO inventory reserve 332,268,000 324,031,000  
Interest capitalization, construction in progress 800,000 7,100,000 4,800,000
Depreciation expense 166,000,000 161,500,000 154,000,000
Goodwill 67,160,000 58,214,000 38,854,000
Unamortized deferred financing costs 5,000,000 2,600,000  
Area leased under timberland cutting rights (acres) 88,000    
Long-term lease costs capitalization 27,400,000 26,200,000  
Depletion expense 700,000 40,000 500,000
Net capitalized software costs 1,100,000 1,900,000  
Software amortization expense 900,000 600,000 600,000
Research and development costs $ 11,300,000 $ 12,500,000 $ 10,900,000
Percent of net sales threshold used to determine major customers 10.00%    
Minimum
      
Significant Accounting Policies [Line Items]      
Amortization period of customer lists and relationships 6 years    
Term of senior credit facilities and notes, in years 5    
Maximum
      
Significant Accounting Policies [Line Items]      
Amortization period of customer lists and relationships 40 years    
Term of senior credit facilities and notes, in years 10