Discontinued Operations - Summary Of Financial Information That Has Been Segregated From Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Discontinued Operations:
Net income from discontinued operations	$ 117	$ 911	$ 46,881	$ 4,176
Consumer and Industrial Chemistry Technologies | Discontinued Operations, Held-for-sale
Discontinued Operations:
Revenue	0	17,280	11,031	56,267
Operating expenses	0	(15,562)	(11,572)	(49,797)
Depreciation and amortization	0	(699)	0	(2,049)
Research and development	0	(161)	(69)	(483)
(Loss) income from operations	0	858	(610)	3,938
Other income	0	59	35	251
Gain on sale of business	148	0	67,842	0
Income before income taxes	148	917	67,267	4,189
Income tax expense	(31)	(6)	(20,386)	(13)
Net income from discontinued operations	117	$ 911	46,881	$ 4,176
Assets:
Accounts receivable, net	0		0		$ 10,547
Inventories, net	0		0		52,069
Other current assets	0		0		446
Property and equipment, net	0		0		15,899
Goodwill	0		0		19,480
Other intangible assets, net	0		0		20,029
Assets held for sale	0		0		118,470
Valuation allowance	0		0		0
Assets held for sale, net	0		0		118,470
Liabilities:
Accounts payable	0		0		8,883
Accrued liabilities	0		0		291
Liabilities held for sale	$ 0		$ 0		$ 9,174