INCENTIVE STOCK PLANS - Schedule of Stock Based Compensation Cost (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation	$ 8,026	$ 6,904	$ 6,428
Tax benefit recognized related to stock-based compensation expense	421	362	338
Timber and Timberlands, net
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation cost, capitalized amount	170	110	101
Selling and general expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation cost	6,839	6,416	5,623
Cost of sales
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation cost	693	378	704
Other operating expense, net \| Merger with Pope Resources
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation cost	$ 324	$ 0	$ 0

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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