Acquisitions - Narrative (Details) - USD ($)			3 Months Ended
	Aug. 31, 2018	Jul. 12, 2018	Mar. 31, 2019	Mar. 31, 2018	Aug. 30, 2018	Jul. 06, 2016
Business Acquisition [Line Items]
Interest expense			$ 3,628,000	$ 540,000
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
Purchase price borrowings	$ 261,400,000.0
Net sales of acquiree since acquisition date			32,900,000
Operating income (loss) of acquiree since acquisition date			(800,000)
Amortization of intangible assets			3,100,000	3,100,000
Interest expense			2,600,000	2,500,000
Additional pro-forma net income (loss)				$ (1,500,000)
Precision Filtration Division of Precision Custom Coatings
Business Acquisition [Line Items]
Payments to acquire business		$ 1,600,000
Post closing working capital adjustment		$ 2,000,000
Selling, Product Development and Administrative Expenses | Interface
Business Acquisition [Line Items]
Amortization of intangible assets			$ 4,000,000