Acquisitions and Divestiture - Narrative (Details)				3 Months Ended		6 Months Ended
	May 09, 2019 USD ($) annual_payment	Aug. 31, 2018 USD ($)	Jul. 12, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Aug. 30, 2018 USD ($)	Jul. 06, 2016 USD ($)
Business Acquisition [Line Items]
Business acquisitions, net of cash acquired						$ (869,000)	$ 0
Interest expense				$ 3,731,000	$ 572,000	7,359,000	1,112,000
Gain on sale of business, net of income taxes						1,459,000	0
Revolving Credit Facility | Amended Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity		$ 450,000,000						$ 175,000,000	$ 450,000,000
Interface
Business Acquisition [Line Items]
Voting interest acquired (as a percent)		100.00%
Business acquisitions, net of cash acquired		$ 268,400,000
Cash acquired from acquisition		5,200,000
Working capital adjustment				1,400,000
Final purchase price				267,000,000.0
Purchase price borrowings		$ 261,400,000
Net sales of acquiree since acquisition date				32,700,000	0	65,600,000	0
Operating income (loss) of acquiree since acquisition date				(100,000)	0	(700,000)	0
Amortization of intangible assets				3,100,000	3,000,000.0	6,100,000	6,100,000
Interest expense				2,600,000	2,100,000	5,200,000	4,200,000
Additional pro-forma net income (loss)					$ (600,000)		$ (2,100,000)
Precision Filtration Division of Precision Custom Coatings
Business Acquisition [Line Items]
Payments to acquire business			$ 1,600,000
Post-closing adjustment			$ 2,000,000.0
Selling, Product Development and Administrative Expenses | Interface
Business Acquisition [Line Items]
Amortization of intangible assets				$ 4,000,000.0		$ 8,000,000.0
Geosol | Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Cash purchase price of divestiture	$ 3,000,000.0
Consideration withheld	$ 400,000
Business Combination, Consideration Withheld, Number of Annual Payments | annual_payment	3
Annual payment of consideration withheld	$ 100,000
Pre-tax gain on sale of business	1,500,000
Gain on sale of business, net of income taxes	$ 1,300,000