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Level 4 Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Goodwill [Abstract] |  |  |
Goodwill | $ 12,170 | $ 12,170 | $ 12,170
Intangible assets [Abstract] |  |  |
Indefinite-Lived trade names and trademarks |  | 8,900 | 8,900
Building Materials Distribution [Member] |  |  |
Goodwill [Abstract] |  |  |
Goodwill |  | 5,593 | 5,593
Wood Products [Member] |  |  |
Goodwill [Abstract] |  |  |
Goodwill |  | 6,577 | 6,577
Corporate and Other [Member] |  |  |
Goodwill [Abstract] |  |  |
Goodwill |  | $ 0 | $ 0

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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