ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Components (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 1,862,645	$ 1,537,642
Other comprehensive income (loss) before reclassifications	44,985	(50,510)
Amounts reclassified from accumulated other comprehensive loss	3,754	7,827
Net other comprehensive (loss) income	48,739	(42,683)
Ending balance	1,909,921	1,862,645
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(73,885)	(31,202)
Ending balance	(25,146)	(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	(11,652)	22,928
Amounts reclassified from accumulated other comprehensive loss	0	0
Net other comprehensive (loss) income	(11,652)	22,928
Ending balance	11,050	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	56,637	(71,644)
Amounts reclassified from accumulated other comprehensive loss	4,991	9,498
Net other comprehensive (loss) income	61,628	(62,146)
Ending balance	(9,428)	(71,056)
Cash flow hedges | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income (loss) before reclassifications	59,700
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	294	869
Net other comprehensive (loss) income	294	(925)
Ending balance	(24,018)	(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	44,985	(50,510)
Amounts reclassified from accumulated other comprehensive loss	5,285	10,367
Net other comprehensive (loss) income	50,270	(40,143)
Ending balance	(21,075)	(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	(1,531)	(2,540)
Net other comprehensive (loss) income	(1,531)	(2,540)
Ending balance	$ (4,071)	$ (2,540)