CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 1,970,129,000	$ 1,563,150,000	$ 1,804,436,000
Cost of goods sold	1,381,373,000	1,165,279,000	1,390,007,000
Gross profit	588,756,000	397,871,000	414,429,000
Operating expenses:
Research and development	40,406,000	40,743,000	41,073,000
Selling, general, and administrative	164,167,000	161,944,000	149,800,000
Depreciation and amortization	126,475,000	126,022,000	136,171,000
Impairment of goodwill	0	400,000,000	0
Gain on insurance proceeds	0	0	(32,850,000)
Loss on disposal of fixed assets	879,000	750,000	773,000
Operating income (loss)	256,829,000	(331,588,000)	119,462,000
Other income (expense)	(209,000)	995,000	3,339,000
Gain (loss) on disposition and exit of business activities	(149,000)	175,189,000	0
Loss on extinguishment of debt	0	(40,843,000)	(3,521,000)
Earnings of unconsolidated joint venture	461,000	457,000	506,000
Interest expense, net	(41,840,000)	(57,930,000)	(75,782,000)
Income (loss) before income taxes	215,092,000	(253,720,000)	44,004,000
Income tax benefit (expense)	(39,502,000)	32,034,000	11,813,000
Consolidated net income (loss)	175,590,000	(221,686,000)	55,817,000
Net income attributable to noncontrolling interest	(5,364,000)	(3,916,000)	(4,512,000)
Net income (loss) attributable to Kraton	$ 170,226,000	$ (225,602,000)	$ 51,305,000
Earnings (loss) per common share:
Basic (in dollars per share)	$ 5.30	$ (7.08)	$ 1.61
Diluted (in dollars per share)	$ 5.21	$ (7.08)	$ 1.60
Weighted average common shares outstanding:
Basic (in shares)	32,098	31,746	31,581
Diluted (in shares)	32,642	31,746	31,881