ACCUMULATED OTHER COMPREHENSIVE LOSS (Schedule of Components) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 1,537,642	$ 1,654,550
Other comprehensive (loss) income before reclassifications	(95,585)	(30,266)
Amounts reclassified from accumulated other comprehensive (loss) income	5,182	(1,175)
Net other comprehensive (loss) income	(90,403)	(31,441)
Ending balance	1,851,148	1,537,642
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(31,202)	239
Ending balance	(121,605)	(31,202)
Foreign currency translation (loss) gains
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(226)	(1,010)
Other comprehensive (loss) income before reclassifications	(6,862)	784
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Net other comprehensive (loss) income	(6,862)	784
Ending balance	(7,088)	(226)
Net investment hedges of New Zealand subsidiary
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	1,321	1,321
Other comprehensive (loss) income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Net other comprehensive (loss) income	0	0
Ending balance	1,321	1,321
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(8,910)	21,965
Other comprehensive (loss) income before reclassifications	(88,723)	(29,251)
Amounts reclassified from accumulated other comprehensive (loss) income	5,519	(1,624)
Net other comprehensive (loss) income	(83,204)	(30,875)
Ending balance	(92,114)	(8,910)
Cash flow hedges | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive (loss) income before reclassifications	91,200
Employee benefit plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(23,387)	(22,037)
Other comprehensive (loss) income before reclassifications	0	(1,799)
Amounts reclassified from accumulated other comprehensive (loss) income	652	449
Net other comprehensive (loss) income	652	(1,350)
Ending balance	(22,735)	(23,387)
Total Rayonier, L.P.
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(31,202)	239
Other comprehensive (loss) income before reclassifications	(95,585)	(30,266)
Amounts reclassified from accumulated other comprehensive (loss) income	6,171	(1,175)
Net other comprehensive (loss) income	(89,414)	(31,441)
Ending balance	(120,616)	(31,202)
Allocation to Operating Partnership
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	0	0
Other comprehensive (loss) income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive (loss) income	(989)	0
Net other comprehensive (loss) income	(989)	0
Ending balance	$ (989)	$ 0