EARNINGS PER COMMON SHARE (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 42,706	$ 35,083	$ 161,579
Less: Net income attributable to noncontrolling interest	2,167	1,240
NET INCOME ATTRIBUTABLE TO RAYONIER INC.	$ 40,539	$ 33,843
Shares used for determining basic earnings per common share (in shares)	128,801,210	123,587,901
Dilutive effect of:
Stock options (in shares)	78,475	106,690
Performance and restricted shares (in shares)	672,712	228,275
Shares used for determining diluted earnings per common share (in shares)	129,552,397	123,922,866
Basic earnings per common share attributable to Rayonier Inc. (in dollars per share)	$ 0.31	$ 0.27
Diluted earnings per common share attributable to Rayonier Inc. (in dollars per share)	$ 0.31	$ 0.27