Subsequent Events - Additional Information (Detail)		0 Months Ended					0 Months Ended
	Jun. 30, 2014 USD ($)	Jul. 17, 2014 Subsequent Event	Jul. 17, 2014 Subsequent Event Kraton Formosa Polymers Corporation Loan Agreement	Jul. 17, 2014 Subsequent Event Kraton Formosa Polymers Corporation Loan Agreement First Five Installments	Jul. 17, 2014 Subsequent Event Kraton Formosa Polymers Corporation Loan Agreement Final Installment	Jul. 17, 2014 Subsequent Event Kraton Formosa Polymers Corporation Loan Agreement Extension Period	Jul. 17, 2014 KFPC Subsequent Event USD ($)	Jul. 17, 2014 KFPC Subsequent Event TWD	Jul. 17, 2014 KFPC Subsequent Event Tranche A USD ($)	Jul. 17, 2014 KFPC Subsequent Event Tranche A TWD	Jul. 17, 2014 KFPC Subsequent Event Tranche B USD ($)	Jul. 17, 2014 KFPC Subsequent Event Tranche B TWD	Jul. 17, 2014 Kraton Polymers L L C Subsequent Event
Subsequent Event [Line Items]
Credit facility, borrowing capacity	$ 31,250,000						$ 182,900,000	5,500,000,000	$ 142,700,000	4,290,000,000	$ 40,200,000	1,210,000,000
Syndicated loan agreement expiration period							2 years	2 years	5 years	5 years	5 years	5 years
Line of credit facility repayment terms			The total outstanding principal amount is payable in six semi-annual installments with the first payment due upon the expiry of a thirty-month period commencing on the first drawdown date and each subsequent payment due every six months thereafter. The first five installments shall be in an amount equal to 10% of the outstanding principal amount and the final installment shall be in an amount equal to the remaining 50% of the outstanding principal amount. In the event the extension period is granted, the final 50% of the outstanding principal amount shall be repaid in five equal semi-annual installments
Payment of outstanding principal amount, percentage				10.00%	50.00%	50.00%
Line of credit facility, fixed interest rate		0.80%
Line of credit facility, description of variable rate		variable interest rate composed of a fixed 0.8% margin plus the secondary market fixing rate in Taiwan Dollar denominated 90 day or 180 day commercial paper, (depending on the interest period as selected by KFPC in the drawdown request or the interest period notice), subject to a floor of 1.7%.
Percentage added to basis		1.70%
Percentage of indebtedness payable													50.00%