Inventories

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories consist principally of materials purchased for resale, including lumber, sheet goods, millwork, doors and windows, as well as certain manufactured products and are valued at the lower of cost or net realizable value, with cost being measured using a weighted average cost approach, which approximates the first-in, first-out approach. A provision for excess and obsolete inventory of $2.3 million and $1.5 million is recorded as of December 31, 2018 and 2017, respectively.