Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Polymer
Disaggregation of Revenue [Line Items]
Revenue	$ 1,098,785	$ 857,558	$ 1,052,968
Polymer | Performance Products
Disaggregation of Revenue [Line Items]
Revenue	627,618	459,906	531,437
Polymer | Specialty Polymers
Disaggregation of Revenue [Line Items]
Revenue	409,736	316,206	334,726
Polymer | Cariflex
Disaggregation of Revenue [Line Items]
Revenue	0	36,930	186,266
Polymer | Isoprene Rubber
Disaggregation of Revenue [Line Items]
Revenue	59,899	42,986	0
Polymer | Other
Disaggregation of Revenue [Line Items]
Revenue	1,532	1,530	539
Chemical
Disaggregation of Revenue [Line Items]
Revenue	871,344	705,592	751,468
Chemical | Adhesives
Disaggregation of Revenue [Line Items]
Revenue	306,662	257,855	262,941
Chemical | Performance Chemicals
Disaggregation of Revenue [Line Items]
Revenue	503,135	406,152	438,146
Chemical | Tires
Disaggregation of Revenue [Line Items]
Revenue	$ 61,547	$ 41,585	$ 50,381