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Level 4 Segment sales to external customers by product line (Details) (USD $) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Concentration risk, sales volume |  |  |  |  |  |  |  |  |  | $ 350,900,000 | $ 304,900,000 |
Revenue from External Customers | 798,300,000 | [1] | 878,000,000 | 852,300,000 | 744,900,000 | 694,600,000 | 764,600,000 | 732,900,000 | 587,000,000 | 3,273,496,000 | 2,779,062,000 | 2,248,088,000
Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Wood Products Sales to Building Materials Distribution |  |  |  |  |  |  |  |  |  | 41.00% |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 1,134,100,000 | 943,300,000 | 712,500,000
Revenue and Related Party Revenue, Net |  |  |  |  |  |  |  |  |  | 674,000,000 | 589,300,000 | 470,200,000
Building Materials Distribution [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 2,599,600,000 | 2,190,200,000 | 1,779,400,000
Building Materials Distribution and Wood Products Combined [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 3,273,500,000 | 2,779,100,000 | 2,248,100,000
Plywood and veneer [Member] | Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 367,800,000 | 324,600,000 | 214,500,000
Engineered wood products [Member] | Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Wood Products Sales to Building Materials Distribution |  |  |  |  |  |  |  |  |  | 75.00% |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 104,400,000 | 87,900,000 | 92,100,000
Lumber [Member] | Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 97,300,000 | 77,400,000 | 69,600,000
Byproducts [Member] | Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 42,500,000 | 44,600,000 | 44,500,000
Particleboard [Member] | Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 40,200,000 | 33,100,000 | 26,100,000
Other [Member] | Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 21,700,000 | 21,800,000 | 23,300,000
Commodity [Member] | Building Materials Distribution [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 1,333,200,000 | 1,092,700,000 | 835,100,000
General line [Member] | Building Materials Distribution [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 857,900,000 | 794,900,000 | 722,000,000
Engineered wood products [Member] | Building Materials Distribution [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 408,400,000 | 302,200,000 | 220,800,000
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 3,273,496,000 | 2,779,062,000 | 2,248,088,000
Operating Segments [Member] | Wood Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 674,000,000 | 589,300,000 | 470,200,000
Operating Segments [Member] | Building Materials Distribution [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  | 2,599,500,000 | 2,189,800,000 | 1,777,900,000
Foreign unaffiliated customers [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales to foreign unaffiliated customers |  |  |  |  |  |  |  |  |  | $ 87,200,000 | $ 82,000,000 | $ 69,400,000
Sales [Member] | Credit Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Concentration of risk |  |  |  |  |  |  |  |  |  | 11.00% | 11.00% |
[1] | (b)The three months ended December 31, 2013, include the results of the recently acquired plywood plants, Chester Wood Products LLC and Moncure Plywood LLC.

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