CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
SALES	$ 245,906	$ 200,964	$ 449,101	$ 395,455
Costs and Expenses
Cost of sales	184,418	144,610	322,906	281,438
Selling and general expenses	11,502	10,246	20,504	19,836
Other operating income, net (Note 15)	(1,659)	(785)	(3,029)	(1,973)
Costs and Expenses, Total	194,261	154,071	340,381	299,301
OPERATING INCOME	51,645	46,893	108,720	96,154
Interest expense	(8,102)	(8,631)	(16,155)	(17,046)
Interest and other miscellaneous income, net	2,905	4	3,525	522
INCOME BEFORE INCOME TAXES	46,448	38,266	96,090	79,630
Income tax expense (Note 8)	(7,110)	(7,493)	(14,047)	(13,774)
NET INCOME	39,338	30,773	82,043	65,856	$ 161,579
Less: Net income attributable to noncontrolling interest	3,080	4,612	5,246	5,853
NET INCOME ATTRIBUTABLE TO RAYONIER INC.	36,258	26,161	76,797	60,003
OTHER COMPREHENSIVE (LOSS) INCOME
Foreign currency translation adjustment, net of income tax expense of $0, $0, $0 and $0	(29,760)	21,484	(20,072)	23,916	9,114
Cash flow hedges, net of income tax benefit (expense) of $2,008, $1,180, $1,640 and $1,148	529	(1,988)	17,143	565	5,693
Amortization of pension and postretirement plans, net of income tax expense of $0, $0, $0 and $0	178	116	338	233	$ (208)
Total other comprehensive (loss) income	(29,053)	19,612	(2,591)	24,714
COMPREHENSIVE INCOME	10,285	50,385	79,452	90,570
Less: Comprehensive (loss) income attributable to noncontrolling interest	(5,011)	9,595	(528)	11,247
COMPREHENSIVE INCOME ATTRIBUTABLE TO RAYONIER INC.	$ 15,296	$ 40,790	$ 79,980	$ 79,323
EARNINGS PER COMMON SHARE (Note 11)
Basic earnings per share attributable to Rayonier Inc. (in dollars per share)	$ 0.28	$ 0.20	$ 0.60	$ 0.48
Diluted earnings per share attributable to Rayonier Inc. (in dollars per share)	0.28	0.20	0.59	0.47
Dividends declared per share (in dollars per share)	$ 0.27	$ 0.25	$ 0.52	$ 0.5	$ 1.00