Long-Term Debt - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended		0 Months Ended	1 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended				6 Months Ended			6 Months Ended			6 Months Ended
	Jan. 31, 2014	Jun. 30, 2014	Jun. 30, 2013	Jul. 17, 2014 Subsequent Event	Jul. 31, 2014 Subsequent Event	Jun. 30, 2014 US Commitment and Borrowing Base	Jun. 30, 2014 6.75% Unsecured Notes Due 2019	Jun. 30, 2013 6.75% Unsecured Notes Due 2019	Jun. 30, 2014 6.75% Unsecured Notes Due 2019	Jun. 30, 2013 6.75% Unsecured Notes Due 2019	Dec. 31, 2013 6.75% Unsecured Notes Due 2019	Mar. 20, 2012 6.75% Unsecured Notes Due 2019	Feb. 11, 2011 6.75% Unsecured Notes Due 2019	Mar. 31, 2013 US Senior Secured Credit Facility	Jun. 30, 2014 Senior Secured Credit Agreement	Jun. 30, 2014 Dutch Senior Secured Revolving Credit Facility	Mar. 31, 2013 Dutch Senior Secured Revolving Credit Facility	Jun. 30, 2014 Dutch Senior Secured Revolving Credit Facility Senior Secured Credit Agreement Minimum	Jun. 30, 2014 Dutch Senior Secured Revolving Credit Facility Senior Secured Credit Agreement Maximum	Jun. 30, 2014 Additional Revolving Credit Facility	Jun. 30, 2014 Revolving Credit Facility Minimum	Jun. 30, 2014 Revolving Credit Facility Senior Secured Credit Agreement Minimum	Jun. 30, 2014 Revolving Credit Facility Senior Secured Credit Agreement Maximum	Jun. 30, 2014 United States Revolving Credit Facility Senior Secured Credit Agreement LIBOR Rate Plus	Jun. 30, 2014 United States Revolving Credit Facility Senior Secured Credit Agreement Federal Funds Rate Plus	Jun. 30, 2014 United States Revolving Credit Facility Senior Secured Credit Agreement Minimum	Jun. 30, 2014 United States Revolving Credit Facility Senior Secured Credit Agreement Maximum	Jun. 30, 2014 Swingline Loans Senior Secured Credit Agreement LIBOR Rate Plus	Jun. 30, 2014 Swingline Loans Senior Secured Credit Agreement Federal Funds Rate Plus
Debt Instrument [Line Items]
Credit facility, borrowing capacity		$ 31,250,000				$ 18,750,000								$ 150,000,000		$ 40,000,000	$ 100,000,000			$ 100,000,000
Percentage of revolving credit facility commitments																					60.00%
Percentage added to basis				1.70%														1.50%	2.00%			1.50%	2.00%	1.00%	0.50%	0.50%	1.00%	1.00%	0.50%
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		231,800,000			231,900,000
Borrowing base drawn		0			0
Senior note face amount							350,000,000		350,000,000			100,000,000	250,000,000
Debt instrument maturity date							Mar. 01, 2019	Mar. 01, 2019	Mar. 01, 2019	Mar. 01, 2019	Mar. 01, 2019
Debt instrument frequency of periodic payment									semi-annually
Debt instrument interest rate							6.75%	6.75%	6.75%	6.75%	6.75%
Capital lease, term	10 years
Capital lease, principal amount	$ 7,000,000	$ 7,033,000	$ 2,900,000