Long-Term Debt - Additional Information (Detail) (USD $)	6 Months Ended		6 Months Ended	12 Months Ended				6 Months Ended		6 Months Ended							6 Months Ended
	Jun. 30, 2013	Aug. 01, 2013 Subsequent Event [Member]	Jun. 30, 2013 6.75% unsecured notes due 2019 [Member]	Dec. 31, 2012 6.75% unsecured notes due 2019 [Member]	Jun. 30, 2012 6.75% unsecured notes due 2019 [Member]	Mar. 20, 2012 6.75% unsecured notes due 2019 [Member]	Feb. 11, 2011 6.75% unsecured notes due 2019 [Member]	Jun. 30, 2013 US commitment and borrowing base [Member]	Mar. 31, 2013 US Senior Secured Credit Facility [Member]	Jun. 30, 2013 Senior Secured Credit Agreement [Member]	Jun. 30, 2013 Senior Secured Credit Agreement [Member] Minimum [Member]	Jun. 30, 2013 Senior Secured Credit Agreement [Member] Minimum [Member] LIBOR Rate Plus [Member]	Jun. 30, 2013 Senior Secured Credit Agreement [Member] Maximum [Member]	Jun. 30, 2013 Senior Secured Credit Agreement [Member] Maximum [Member] LIBOR Rate Plus [Member]	Jun. 30, 2013 Dutch Senior Secured Revolving Credit Facility [Member]	Mar. 31, 2013 Dutch Senior Secured Revolving Credit Facility [Member]	Jun. 30, 2013 Revolving Credit Facility [Member] Minimum [Member]	Jun. 30, 2013 United States Revolving Credit Facility [Member] Senior Secured Credit Agreement [Member] Federal Funds Rate Plus [Member]	Jun. 30, 2013 United States Revolving Credit Facility [Member] Senior Secured Credit Agreement [Member] LIBOR Rate Plus [Member]	Jun. 30, 2013 Swingline Loans [Member] Senior Secured Credit Agreement [Member] Federal Funds Rate Plus [Member]	Jun. 30, 2013 Swingline Loans [Member] Senior Secured Credit Agreement [Member] LIBOR Rate Plus [Member]	Jun. 30, 2013 U.S. borrowing base [Member]	Aug. 01, 2013 U.S. borrowing base [Member] Subsequent Event [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 31,250,000							$ 18,750,000	$ 150,000,000							$ 100,000,000
Additional revolving credit facility commitments	100,000,000														40,000,000
Percentage of revolving credit facility commitments																	60.00%
Percentage added to basis											0.50%	1.50%	1.00%	2.00%				0.50%	1.00%	0.50%	1.00%
Commitment fee, annual rate										0.375%
Financial covenant term	The Senior Secured Credit Facilities contain a financial covenant that if either (a) excess availability is less than the greater of (i) 12.5% of the lesser of the commitments and the borrowing base and (ii) $31,250,000 or (b) U.S. availability is less than the greater of (i) 12.5% of the lesser of the U.S. commitments and U.S. borrowing base and (ii) $18,750,000, then following such event, Kraton and its restricted subsidiaries must maintain a fixed charge coverage ratio of at least 1.0 to 1.0 for four fiscal quarters (or for a shorter duration if certain financial conditions are met).
Percentage of commitment and borrowing base	12.50%							12.50%
Fixed charge coverage ratio	100.00%
Borrowing base																						206,200,000	201,900,000
Borrowing base drawn	0	0
Senior note face amount			$ 350,000,000			$ 100,000,000	$ 250,000,000
Debt instrument maturity date			Mar. 01, 2019
Debt instrument frequency of periodic payment				Semi-annually
Debt instrument interest rate	6.75%		6.75%	6.75%	6.75%