Consolidating Statement of Operations (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]
Sales revenue	$ 323,767		$ 334,543		$ 635,423		$ 674,650
Cost of goods sold	251,687		274,682		506,270		554,878
Gross profit	72,080		59,861		129,153		119,772
Operating expenses:
Research and development	7,999		8,446		16,296		16,359
Selling, general and administrative	28,280		25,004		62,498		51,118
Depreciation and amortization	16,669		15,741		33,078		30,839
Total operating expenses	52,948		49,191		111,872		98,316
Earnings of unconsolidated joint venture	127		121		244		255
Interest expense (income), net	6,230		5,909		12,568		19,207
Income before income taxes	13,029		4,882		4,957		2,504
Income tax expense (benefit)	2,161		905		2,283		2,351
Consolidated net income	10,868		3,977		2,674		153
Net income (loss) attributable to noncontrolling interest	(275)		148		(560)		72
Net income attributable to Kraton	11,143		3,829		3,234		81
Eliminations
Supplemental Guarantor Information [Line Items]
Sales revenue	(50,056)		(39,994)		(86,430)		(81,020)
Cost of goods sold	(50,056)		(39,994)		(86,430)		(81,020)
Operating expenses:
Earnings in consolidated subsidiaries	(56,561)		(20,735)		(67,552)		(34,697)
Income before income taxes	(56,561)		(20,735)		(67,552)		(34,697)
Consolidated net income	(56,561)		(20,735)		(67,552)		(34,697)
Net income attributable to Kraton	(56,561)		(20,735)		(67,552)		(34,697)
Kraton
Operating expenses:
Earnings in consolidated subsidiaries	10,868		3,977		2,674		153
Income before income taxes	10,868		3,977		2,674		153
Consolidated net income	10,868		3,977		2,674		153
Net income attributable to Kraton	10,868		3,977		2,674		153
Kraton Polymers L L C
Supplemental Guarantor Information [Line Items]
Cost of goods sold	(300)	[1]	231	[1]	(15,414)	[1]	1,964	[1]
Gross profit	300	[1]	(231)	[1]	15,414	[1]	(1,964)	[1]
Operating expenses:
Research and development	4,050	[1]			8,549	[1]
Selling, general and administrative	19,771	[1]	146	[1]	46,467	[1]	148	[1]
Depreciation and amortization	5,587	[1]	4,080	[1]	11,124	[1]	8,159	[1]
Total operating expenses	29,408	[1]	4,226	[1]	66,140	[1]	8,307	[1]
Earnings in consolidated subsidiaries	45,693	[1]	16,758	[1]	64,878	[1]	34,544	[1]
Interest expense (income), net	6,223	[1]	9,044	[1]	12,478	[1]	24,934	[1]
Income before income taxes	10,362	[1]	3,257	[1]	1,674	[1]	(661)	[1]
Income tax expense (benefit)	(506)	[1]	(720)	[1]	(1,000)	[1]	(814)	[1]
Consolidated net income	10,868	[1]	3,977	[1]	2,674	[1]	153	[1]
Net income attributable to Kraton	10,868	[1]	3,977	[1]	2,674	[1]	153	[1]
Guarantor Subsidiaries
Supplemental Guarantor Information [Line Items]
Sales revenue	174,233		164,643		331,071		342,225
Cost of goods sold	137,364		124,242		264,565		272,361
Gross profit	36,869		40,401		66,506		69,864
Operating expenses:
Research and development	483		4,437		937		8,780
Selling, general and administrative	37		16,601		125		35,572
Depreciation and amortization	7,351		8,085		14,522		15,619
Total operating expenses	7,871		29,123		15,584		59,971
Interest expense (income), net	39		(3,544)		164		(7,120)
Income before income taxes	28,959		14,822		50,758		17,013
Income tax expense (benefit)	2		10		5		21
Consolidated net income	28,957		14,812		50,753		16,992
Net income attributable to Kraton	28,957		14,812		50,753		16,992
Non-Guarantor Subsidiaries
Supplemental Guarantor Information [Line Items]
Sales revenue	199,590		209,894		390,782		413,445
Cost of goods sold	164,679		190,203		343,549		361,573
Gross profit	34,911		19,691		47,233		51,872
Operating expenses:
Research and development	3,466		4,009		6,810		7,579
Selling, general and administrative	8,472		8,257		15,906		15,398
Depreciation and amortization	3,731		3,576		7,432		7,061
Total operating expenses	15,669		15,842		30,148		30,038
Earnings of unconsolidated joint venture	127		121		244		255
Interest expense (income), net	(32)		409		(74)		1,393
Income before income taxes	19,401		3,561		17,403		20,696
Income tax expense (benefit)	2,665		1,615		3,278		3,144
Consolidated net income	16,736		1,946		14,125		17,552
Net income (loss) attributable to noncontrolling interest	(275)		148		(560)		72
Net income attributable to Kraton	$ 17,011		$ 1,798		$ 14,685		$ 17,480

[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.