Consolidating Statement of Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Supplemental Guarantor Information [Line Items]
Net income attributable to Kraton	$ 11,143		$ 3,829		$ 3,234		$ 81
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $0	1,137		(3,975)		2,936		(13,246)
Realized gain from interest rate swap, net of tax							837
Unrealized loss from net investment hedge, net of tax of $0							(225)
Other comprehensive income (loss), net of tax	1,137		(3,975)		2,936		(12,634)
Unrealized loss from net investment hedge, net of tax							(225)
Comprehensive income (loss) attributable to Kraton	12,280		(146)		6,170		(12,553)
Comprehensive income (loss) attributable to noncontrolling interest	479		(291)		(387)		(67)
Consolidated comprehensive income (loss)	12,759		(437)		5,783		(12,620)
Eliminations
Supplemental Guarantor Information [Line Items]
Net income attributable to Kraton	(56,561)		(20,735)		(67,552)		(34,697)
Other comprehensive income (loss):
Comprehensive income (loss) attributable to Kraton	(56,561)		(20,735)		(67,552)		(34,697)
Consolidated comprehensive income (loss)	(56,561)		(20,735)		(67,552)		(34,697)
Kraton
Supplemental Guarantor Information [Line Items]
Net income attributable to Kraton	10,868		3,977		2,674		153
Other comprehensive income (loss):
Comprehensive income (loss) attributable to Kraton	10,868		3,977		2,674		153
Consolidated comprehensive income (loss)	10,868		3,977		2,674		153
Kraton Polymers L L C
Supplemental Guarantor Information [Line Items]
Net income attributable to Kraton	10,868	[1]	3,977	[1]	2,674	[1]	153	[1]
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $0	6	[1]	104	[1]	(268)	[1]	(2)	[1]
Realized gain from interest rate swap, net of tax							837	[1]
Unrealized loss from net investment hedge, net of tax of $0							(225)	[1]
Other comprehensive income (loss), net of tax	6	[1]	104	[1]	(268)	[1]	610	[1]
Unrealized loss from net investment hedge, net of tax							(225)	[1]
Comprehensive income (loss) attributable to Kraton	10,874	[1]	4,081	[1]	2,406	[1]	763	[1]
Consolidated comprehensive income (loss)	10,874	[1]	4,081	[1]	2,406	[1]	763	[1]
Guarantor Subsidiaries
Supplemental Guarantor Information [Line Items]
Net income attributable to Kraton	28,957		14,812		50,753		16,992
Other comprehensive income (loss):
Comprehensive income (loss) attributable to Kraton	28,957		14,812		50,753		16,992
Consolidated comprehensive income (loss)	28,957		14,812		50,753		16,992
Non-Guarantor Subsidiaries
Supplemental Guarantor Information [Line Items]
Net income attributable to Kraton	17,011		1,798		14,685		17,480
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $0	1,131		(4,079)		3,204		(13,244)
Other comprehensive income (loss), net of tax	1,131		(4,079)		3,204		(13,244)
Comprehensive income (loss) attributable to Kraton	18,142		(2,281)		17,889		4,236
Comprehensive income (loss) attributable to noncontrolling interest	479		(291)		(387)		(67)
Consolidated comprehensive income (loss)	$ 18,621		$ (2,572)		$ 17,502		$ 4,169

[1] Kraton Polymers LLC and Kraton Polymers Capital Corporation, a financing subsidiary, collectively, the Issuers, are co-issuers of the 6.75% senior notes due March 1, 2019. Kraton Polymers Capital Corporation has minimal assets and income. We do not believe that separate financial information concerning the Issuers would provide additional information that would be material to investors in making an investment decision.