EARNINGS PER COMMON SHARE (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 20,920	$ 27,793	$ 39,338	$ 42,706	$ 48,713	$ 82,043
Less: Net income attributable to noncontrolling interest	(2,168)		(3,080)		(5,167)	(5,246)
Net income attributable to Rayonier Inc.	$ 18,752		$ 36,258		$ 43,546	$ 76,797
Shares used for determining basic earnings per common share (in shares)	129,380,282		129,067,325		129,277,490	128,935,003
Dilutive effect of:
Stock options (in shares)	13,463		103,154		16,580	90,815
Performance and restricted shares (in shares)	250,170		540,808		403,915	606,760
Shares used for determining diluted earnings per common share (in shares)	129,643,915		129,711,287		129,697,985	129,632,578
Basic earnings per common share attributable to Rayonier Inc. (in dollars per share)	$ 0.14		$ 0.28		$ 0.34	$ 0.60
Diluted earnings per common share attributable to Rayonier Inc. (in dollars per share)	$ 0.14		$ 0.28		$ 0.34	$ 0.59