CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to Kraton	$ 170,226	$ (225,602)	$ 51,305
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $0	(28,875)	36,431	(5,296)
Reclassification of foreign currency translation adjustments from disposition and exit of business activities, net of tax of $0	0	66,533	0
Unrealized gain (loss) on cash flow hedges, net of tax expense of $458 and benefit of $1,165, respectively	0	1,387	(6,311)
Reclassification of loss on cash flow hedge, net of tax benefit of $293	0	1,002	0
Unrealized gain (loss) on net investment hedge, net of tax expense of $5,785, benefit of $6,865 and expense of $1,379, respectively	19,792	(25,881)	7,471
Reclassification of gain on net investment hedge, net of tax expense of $0	0	(899)	0
(Increase) decrease in benefit plans liability, net of tax expense of $2,731 and benefit of $3,702 and $2,117, respectively	19,027	(10,643)	(9,960)
Other comprehensive income (loss), net of tax	9,944	67,930	(14,096)
Comprehensive income (loss) attributable to Kraton	180,170	(157,672)	37,209
Comprehensive income attributable to noncontrolling interest	6,139	6,654	5,524
Consolidated comprehensive income (loss)	$ 186,309	$ (151,018)	$ 42,733