ORM TIMBER FUND II, INC. (FUND II), ORM TIMBER FUND III (REIT) INC. (FUND III), AND ORM TIMBER FUND IV (REIT) LLC. (FUND IV) (COLLECTIVELY, “THE FUNDS”) (Partnership's Consolidated Balance Sheet included Assets and Liabilities of Funds) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash	$ 6,197	$ 3,330
Total current assets	17,011	20,366
Properties and equipment, net of accumulated depreciation	469,903	478,628
Other long-term assets	6,635	9,255
Total assets	493,549	508,249	$ 380,673
Current liabilities	36,714	9,981
Total liabilities, partners’ capital, and noncontrolling interests	493,549	508,249
Funds Timber
Condensed Financial Statements, Captions [Line Items]
Cash	6,197	3,330
Other current assets	5,192	4,931
Total current assets	11,389	8,261
Properties and equipment, net of accumulated depreciation	355,162	360,163
Other long-term assets	0	1,962
Total assets	366,551	370,386
Current liabilities	28,737	3,237
Long-term debt	32,345	57,313
Other long-term liabilities	0	300
Funds’ equity	305,469	309,536
Total liabilities, partners’ capital, and noncontrolling interests	$ 366,551	$ 370,386