Acquisitions - Narrative (Details) - USD ($)			1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Jul. 07, 2016	Dec. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jul. 06, 2016
Business Acquisition [Line Items]
Amortization expense						$ 3,000,000
Fair value step-up adjustments to inventory related to acquisitions						1,100,000
Net income				$ 10,675,000	$ 12,785,000	35,469,000	$ 32,767,000
Acquisition related expenses						100,000
Revolving Credit Facility | Amended Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity		$ 175,000,000
Revolving Credit Facility | Amended Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity		$ 175,000,000		175,000,000.0		175,000,000.0		$ 100,000,000
Gutsche
Business Acquisition [Line Items]
Percentage of voting interest acquired	100.00%		100.00%
Purchase price	$ 57,600,000
Post closing working capital adjustment, estimated			$ 3,000,000
Post closing working capital adjustment				400,000
Purchase price including post closing adjustment				58,000,000
Purchase price borrowings	31,600,000		31,600,000
Investment in joint venture	$ 0		$ 0
Gutsche | Subsidiaries
Business Acquisition [Line Items]
Net sales of acquiree since acquisition date				13,900,000		37,200,000
Operating income of acquiree since acquisition date				1,200,000		2,100,000
Purchase accounting inventory fair value step-up adjustment				100,000		600,000
Pre-tax restructuring expenses						100,000
Texel
Business Acquisition [Line Items]
Percentage of voting interest acquired		100.00%
Purchase price borrowings		$ 85,000,000.0
Net sales of acquiree since acquisition date				26,500,000	23,200,000	62,300,000	23,200,000
Operating income of acquiree since acquisition date				3,200,000	1,700,000	5,100,000	1,700,000
Purchase accounting inventory fair value step-up adjustment				1,600,000		$ 500,000	1,600,000
Payments to acquire business		102,700,000
Investment in joint venture		$ 616,000
Reclassification from cost of sales							900,000
Reclassification to net sales							500,000
Texel | Afitex Texel Geosynthetiques, Inc.
Business Acquisition [Line Items]
Interest in joint venture as part of acquisition		50.00%
Investment in joint venture		$ 600,000
Texel Brand and Gutsche
Business Acquisition [Line Items]
Amortization expense				1,000,000
Fair value step-up adjustments to inventory related to acquisitions				$ 100,000	1,600,000		1,600,000
Amortization expense					800,000		3,100,000
Depreciation expense					200,000		1,100,000
Interest expense							500,000
Texel Brand and Gutsche | Acquisition-related Costs
Business Acquisition [Line Items]
Net income					$ 800,000		$ 3,200,000