CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Consolidated net income	$ 13,612	$ 22,061
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	31,522	35,376
Lease amortization	4,767	0
Amortization of debt original issue discount	267	1,090
Amortization of debt issuance costs	1,110	1,945
Loss on disposal of property, plant, and equipment	0	27
(Gain) loss on extinguishment of debt	(210)	7,591
Earnings from unconsolidated joint venture, net of dividends received	410	408
Deferred income tax provision (benefit)	(595)	(91)
Share-based compensation	3,309	2,902
Decrease (increase) in:
Accounts receivable	(63,164)	(43,428)
Inventories of products, materials, and supplies	(5,877)	1,932
Other assets	861	10,813
Increase (decrease) in:
Accounts payable-trade	(1,134)	(1,684)
Other payables and accruals	(9,397)	(19,235)
Other long-term liabilities	(2,177)	(1,958)
Due to related party	(3,508)	2,403
Net cash provided by (used in) operating activities	(30,204)	20,152
CASH FLOWS FROM INVESTING ACTIVITIES
Kraton purchase of property, plant, and equipment	(22,327)	(23,373)
KFPC purchase of property, plant, and equipment	(783)	(201)
Purchase of software and other intangibles	(3,287)	(437)
Net cash used in investing activities	(26,397)	(24,011)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from debt	19,500	211,614
Repayments of debt	(4,310)	(212,000)
KFPC proceeds from debt	14,600	10,197
KFPC repayments of debt	(19,594)	(25,337)
Capital lease payments	(41)	(258)
Purchase of treasury stock	(2,684)	(5,748)
Proceeds from the exercise of stock options	1,545	1,368
Settlement of interest rate swap	0	2,587
Debt issuance costs	0	(3,110)
Net cash provided by (used in) financing activities	9,016	(20,687)
Effect of exchange rate differences on cash	(1,145)	347
Net decrease in cash and cash equivalents	(48,730)	(24,199)
Cash and cash equivalents, beginning of period	85,891	89,052
Cash and cash equivalents, end of period	37,161	64,853
Supplemental disclosures during the period:
Cash paid for income taxes, net of refunds received	4,137	719
Cash paid for interest, net of capitalized interest	6,009	21,332
Capitalized interest	1,205	712
Supplemental non-cash disclosures: increase (decrease) during the period
Property, plant, and equipment accruals	(7,197)	(6,369)
Operating leases	$ 70,878	$ 0