EARNINGS PER COMMON SHARE - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net Income	$ 17,437	$ 1,528	$ 20,920	$ 27,793	$ 4,647	$ 30,639	$ 39,338	$ 42,706	$ 67,678	$ 117,330	$ 161,579
Less: Net income attributable to noncontrolling interest									(8,573)	(15,114)	(12,737)
NET INCOME ATTRIBUTABLE TO RAYONIER INC.	$ 15,992	$ (433)	$ 18,752	$ 24,794	$ 1,987	$ 23,432	$ 36,258	$ 40,539	$ 59,105	$ 102,216	$ 148,842
Shares used for determining basic earnings per common share (in shares)									129,257,202	129,043,627	127,367,608
Dilutive effect of:
Stock options (in shares)									12,209	71,276	91,956
Performance shares, restricted shares and restricted stock units (in shares)									328,977	575,328	350,385
Shares used for determining diluted earnings per common share (in shares)									129,598,388	129,690,231	127,809,949
Basic earnings per common share attributable to Rayonier Inc (in dollars per share)	$ 0.12	$ 0	$ 0.14	$ 0.19	$ 0.02	$ 0.18	$ 0.28	$ 0.31	$ 0.46	$ 0.79	$ 1.17
Diluted earnings per common share attributable to Rayonier Inc (in dollars per share)	$ 0.12	$ 0	$ 0.14	$ 0.19	$ 0.02	$ 0.18	$ 0.28	$ 0.31	$ 0.46	$ 0.79	$ 1.16