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Segment Information (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2020

Sep. 30, 2019

Segment Reporting Information [Line Items]

Sales

$ 1,589,313

$ 1,269,524

$ 4,002,607

$ 3,541,691

Income from operations

158,572

44,898

235,889

111,684

Curtailment of I-joist Production at Roxboro, NC Facility

Segment Reporting Information [Line Items]

Accelerated depreciation

15,000

Operating Segments [Member]

Segment Reporting Information [Line Items]

Income from operations

173,936

54,262

267,285

136,117

Intersegment Eliminations [Member]

Segment Reporting Information [Line Items]

Sales

^[1]

(212,044)

(201,199)

(584,573)

(587,940)

Corporate, Non-Segment [Member]

Segment Reporting Information [Line Items]

Income from operations

(15,364)

(9,364)

(31,396)

(24,433)

Wood Products [Member]

Segment Reporting Information [Line Items]

Sales

151,600

123,900

380,700

391,000

Wood Products [Member] | Curtailment of I-joist Production at Roxboro, NC Facility

Segment Reporting Information [Line Items]

Accelerated depreciation

15,000

Other closure-related costs

1,700

Wood Products [Member] | Operating Segments [Member]

Segment Reporting Information [Line Items]

Sales

363,674

325,102

965,240

978,881

Income from operations

^[2]

66,035

15,597

86,872

46,135

Building Materials Distribution [Member]

Segment Reporting Information [Line Items]

Sales

1,437,700

1,145,600

3,621,900

3,150,700

Building Materials Distribution [Member] | Operating Segments [Member]

Segment Reporting Information [Line Items]

Sales

1,437,683

1,145,621

3,621,940

3,150,750

Income from operations

$ 107,901

$ 38,665

$ 180,413

$ 89,982

[1]	Primarily represents intersegment sales from our Wood Products segment to our Building Materials Distribution segment.
[2]	Wood Products segment operating income for the nine months ended September 30, 2020, includes $15.0 million of accelerated depreciation and $1.7 million of other closure-related costs due to the permanent curtailment of I-joist production at our Roxboro, North Carolina facility. For more information, see Note 5, Curtailment of Manufacturing Facility.

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