Consolidating Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Supplemental Guarantor Information [Line Items]
Sales revenue	$ 334,543		$ 375,756		$ 674,650		$ 784,069
Cost of goods sold	274,682		302,276		554,878		635,070
Gross profit	59,861		73,480		119,772		148,999
Operating expenses:
Research and development	8,446		7,996		16,359		15,556
Selling, general and administrative	25,004		26,313		51,118		52,776
Depreciation and amortization	15,741		15,885		30,839		31,734
Total operating expenses	49,191		50,194		98,316		100,066
Earnings in consolidated subsidiaries	0		0		0		0
Earnings of unconsolidated joint venture	121		163		255		300
Interest expense (income), net	5,909		7,773		19,207		14,472
Income (loss) before income taxes	4,882		15,676		2,504		34,761
Income tax expense (benefit)	905		3,269		2,351		6,001
Consolidated net income	3,977		12,407		153		28,760
Net income attributable to noncontrolling interest	148		0		72		0
Net income (loss) attributable to Kraton	3,829		12,407		81		28,760
Kraton [Member]
Supplemental Guarantor Information [Line Items]
Sales revenue	0		0		0		0
Cost of goods sold	0		0		0		0
Gross profit	0		0		0		0
Operating expenses:
Research and development	0		0		0		0
Selling, general and administrative	0		0		0		0
Depreciation and amortization	0		0		0		0
Total operating expenses	0		0		0		0
Earnings in consolidated subsidiaries	3,977		12,407		153		28,760
Earnings of unconsolidated joint venture	0		0		0		0
Interest expense (income), net	0		0		0		0
Income (loss) before income taxes	3,977		12,407		153		28,760
Income tax expense (benefit)	0		0		0		0
Consolidated net income	3,977				153
Net income attributable to noncontrolling interest	0				0
Net income (loss) attributable to Kraton	3,977		12,407		153		28,760
Kraton Polymers LLC [Member]
Supplemental Guarantor Information [Line Items]
Sales revenue	0	[1]	0	[1]	0	[1]	0	[1]
Cost of goods sold	231	[1]	(29)	[1]	1,964	[1]	(1,085)	[1]
Gross profit	(231)	[1]	29	[1]	(1,964)	[1]	1,085	[1]
Operating expenses:
Research and development	0	[1]	0	[1]	0	[1]	0	[1]
Selling, general and administrative	146	[1]	0	[1]	148	[1]	0	[1]
Depreciation and amortization	4,080	[1]	4,080	[1]	8,159	[1]	8,159	[1]
Total operating expenses	4,226	[1]	4,080	[1]	8,307	[1]	8,159	[1]
Earnings in consolidated subsidiaries	16,758	[1]	25,865	[1]	34,544	[1]	54,733	[1]
Earnings of unconsolidated joint venture	0	[1]	0	[1]	0	[1]	0	[1]
Interest expense (income), net	9,044	[1]	9,673	[1]	24,934	[1]	19,332	[1]
Income (loss) before income taxes	3,257	[1]	12,141	[1]	(661)	[1]	28,327	[1]
Income tax expense (benefit)	(720)	[1]	(266)	[1]	(814)	[1]	(433)	[1]
Consolidated net income	3,977	[1]			153	[1]
Net income attributable to noncontrolling interest	0	[1]			0	[1]
Net income (loss) attributable to Kraton	3,977	[1]	12,407	[1]	153	[1]	28,760	[1]
Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Sales revenue	164,643		189,256		342,225		395,477
Cost of goods sold	124,242		155,606		272,361		325,619
Gross profit	40,401		33,650		69,864		69,858
Operating expenses:
Research and development	4,437		4,827		8,780		9,713
Selling, general and administrative	16,601		17,907		35,572		35,973
Depreciation and amortization	8,085		8,863		15,619		17,159
Total operating expenses	29,123		31,597		59,971		62,845
Earnings in consolidated subsidiaries	0		0		0		0
Earnings of unconsolidated joint venture	0		0		0		0
Interest expense (income), net	(3,544)		(3,457)		(7,120)		(7,513)
Income (loss) before income taxes	14,822		5,510		17,013		14,526
Income tax expense (benefit)	10		(902)		21		(1,117)
Consolidated net income	14,812				16,992
Net income attributable to noncontrolling interest	0				0
Net income (loss) attributable to Kraton	14,812		6,412		16,992		15,643
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Sales revenue	209,894		233,540		413,445		467,168
Cost of goods sold	190,203		193,739		361,573		389,112
Gross profit	19,691		39,801		51,872		78,056
Operating expenses:
Research and development	4,009		3,169		7,579		5,843
Selling, general and administrative	8,257		8,406		15,398		16,803
Depreciation and amortization	3,576		2,942		7,061		6,416
Total operating expenses	15,842		14,517		30,038		29,062
Earnings in consolidated subsidiaries	0		0		0		0
Earnings of unconsolidated joint venture	121		163		255		300
Interest expense (income), net	409		1,557		1,393		2,653
Income (loss) before income taxes	3,561		23,890		20,696		46,641
Income tax expense (benefit)	1,615		4,437		3,144		7,551
Consolidated net income	1,946				17,552
Net income attributable to noncontrolling interest	148				72
Net income (loss) attributable to Kraton	1,798		19,453		17,480		39,090
Eliminations [Member]
Supplemental Guarantor Information [Line Items]
Sales revenue	(39,994)		(47,040)		(81,020)		(78,576)
Cost of goods sold	(39,994)		(47,040)		(81,020)		(78,576)
Gross profit	0		0		0		0
Operating expenses:
Research and development	0		0		0		0
Selling, general and administrative	0		0		0		0
Depreciation and amortization	0		0		0		0
Total operating expenses	0		0		0		0
Earnings in consolidated subsidiaries	(20,735)		(38,272)		(34,697)		(83,493)
Earnings of unconsolidated joint venture	0		0		0		0
Interest expense (income), net	0		0		0		0
Income (loss) before income taxes	(20,735)		(38,272)		(34,697)		(83,493)
Income tax expense (benefit)	0		0		0		0
Consolidated net income	(20,735)				(34,697)
Net income attributable to noncontrolling interest	0				0
Net income (loss) attributable to Kraton	$ (20,735)		$ (38,272)		$ (34,697)		$ (83,493)

[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.