CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Total Kraton Stockholders' Equity	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning balance at Dec. 31, 2015	$ 392,992	$ 358,740	$ 306	$ 349,871	$ 147,131	$ (138,568)	$ 34,252
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	109,256	111,048			111,048		(1,792)
Other comprehensive income	23,550	21,957				21,957	1,593
Retired treasury stock from employee tax withholdings	(967)	(967)	(1)	(966)
Exercise of stock options	2,625	2,625	1	2,624
Non-cash compensation related to equity awards	7,272	7,272	3	7,269
Ending balance at Sep. 30, 2016	534,728	500,675	309	358,798	258,179	(116,611)	34,053
Beginning balance at Dec. 31, 2016	490,237	457,901	310	361,682	254,439	(158,530)	32,336
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	22,763	27,941			27,941		(5,178)
Other comprehensive income	63,345	61,425				61,425	1,920
Retired treasury stock from employee tax withholdings	(2,297)	(2,297)	0	(2,297)
Exercise of stock options	2,954	2,954	1	2,953
Non-cash compensation related to equity awards	7,366	7,366	2	7,364
Ending balance at Sep. 30, 2017	$ 584,368	$ 555,290	$ 313	$ 369,702	$ 282,380	$ (97,105)	$ 29,078