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Goodwill and Intangible Assets
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
    Goodwill represents the excess of the purchase price and related costs over the fair value of the net tangible and intangible assets of businesses acquired.

    The carrying amount of our goodwill by segment is as follows:
Building
Materials
Distribution

Wood
Products
Total
(thousands)
Balance at December 31, 2020 and 2019$11,792 $48,590 $60,382 

    At December 31, 2020 and 2019, intangible assets represented the values assigned to trade names and trademarks and customer relationships. The trade names and trademarks have indefinite lives and are not amortized. The weighted-average useful life for customer relationships from the date of purchase is approximately 10 years. Amortization expense is expected to be approximately $1.2 million per year for the next five years.
    Intangible assets consisted of the following:
December 31, 2020
Gross Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount
(thousands)
Trade names and trademarks$8,900 $— $8,900 
Customer relationships12,450 (4,776)7,674 
$21,350 $(4,776)$16,574 

December 31, 2019
Gross Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount
(thousands)
Trade names and trademarks$8,900 $— $8,900 
Customer relationships12,450 (3,553)8,897 
$21,350 $(3,553)$17,797