v2.4.0.6
GOODWILL AND OTHER INTANGIBLE ASSETS (Details 4) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Changes made to finite-lived intangible assets by reportable segment      
Amortization expense for the definite-lived intangible assets $ 3,300,000 $ 3,100,000 $ 1,000,000
Total definite-lived intangible asset estimated annual amortization expense for the next five fiscal years      
Year one 3,300,000    
Year two 3,300,000    
Year three 3,300,000    
Year four 3,300,000    
Year five 3,300,000    
Customer relationships
      
Changes made to finite-lived intangible assets by reportable segment      
Weighted average estimated useful life (in years) 15    
Technology
      
Changes made to finite-lived intangible assets by reportable segment      
Weighted average estimated useful life (in years) 5    
Building Products
      
Changes made to finite-lived intangible assets by reportable segment      
Gross carrying amounts 52,605,000 52,605,000  
Accumulated amortization (18,303,000) (14,955,000)  
Net carrying amounts 34,302,000 37,650,000  
Building Products | Customer relationships
      
Changes made to finite-lived intangible assets by reportable segment      
Gross carrying amounts 35,238,000 35,238,000  
Accumulated amortization (8,695,000) (6,860,000)  
Net carrying amounts 26,543,000 28,378,000  
Building Products | Technology
      
Changes made to finite-lived intangible assets by reportable segment      
Gross carrying amounts 17,367,000 17,367,000  
Accumulated amortization (9,608,000) (8,095,000)  
Net carrying amounts $ 7,759,000 $ 9,272,000