ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Components (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 1,474,057
Other comprehensive income (loss) before reclassifications	23,756	$ (50,510)
Amounts reclassified from accumulated other comprehensive loss	13,569	7,827
Net other comprehensive (loss) income	37,325	(42,683)
Ending balance	1,710,393	1,474,057
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(73,885)	(31,202)
Ending balance	(36,560)	(73,885)
Foreign currency translation (loss) gains
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	22,702	(226)
Other comprehensive income (loss) before reclassifications	(16,369)	22,928
Amounts reclassified from accumulated other comprehensive loss	0	0
Net other comprehensive (loss) income	(16,369)	22,928
Ending balance	6,333	22,702
Net investment hedges of New Zealand subsidiary
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	1,321	1,321
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	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	(71,056)	(8,910)
Other comprehensive income (loss) before reclassifications	40,125	(71,644)
Amounts reclassified from accumulated other comprehensive loss	13,874	9,498
Net other comprehensive (loss) income	53,999	(62,146)
Ending balance	(17,057)	(71,056)
Cash flow hedges | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications	46,400
Employee benefit plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(24,312)	(23,387)
Other comprehensive income (loss) before reclassifications	0	(1,794)
Amounts reclassified from accumulated other comprehensive loss	881	869
Net other comprehensive (loss) income	881	(925)
Ending balance	(23,431)	(24,312)
Total Rayonier, L.P.
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(71,345)	(31,202)
Other comprehensive income (loss) before reclassifications	23,756	(50,510)
Amounts reclassified from accumulated other comprehensive loss	14,755	10,367
Net other comprehensive (loss) income	38,511	(40,143)
Ending balance	(32,834)	(71,345)
Allocation to Operating Partnership
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(2,540)	0
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	(1,186)	(2,540)
Net other comprehensive (loss) income	(1,186)	(2,540)
Ending balance	$ (3,726)	$ (2,540)