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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]  
Inventories [Table Text Block] Inventories included the following (work in process is not material):
 
 March 31,
2022
December 31,
2021
 (thousands)
Finished goods and work in process $712,938 $573,908 
Logs 51,437 47,401 
Other raw materials and supplies 40,293 39,362 
 $804,668 $660,671 
Property and Equipment [Table Text Block] Property and equipment consisted of the following asset classes:
 
 March 31,
2022
December 31,
2021
 (thousands)
Land$51,564 $51,564 
Buildings179,044 178,323 
Improvements67,539 66,492 
Mobile equipment, information technology, and office furniture194,395 191,134 
Machinery and equipment 739,626 735,979 
Construction in progress 37,533 35,912 
 1,269,701 1,259,404 
Less: accumulated depreciation(778,306)(764,164)
 $491,395 $495,240