Acquisitions - Acquisitions Narrative (Details) - USD ($)			1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Jul. 07, 2016	Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jul. 06, 2016
Business Acquisition [Line Items]
Amortization expense				$ 900,000		$ 2,000,000
Fair value step-up adjustments to inventory related to acquisitions				500,000		1,000,000
Net income				13,125,000	$ 10,813,000	24,794,000	$ 19,982,000
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				12,100,000		23,300,000
Operating income of acquiree since acquisition date				600,000		900,000
Purchase accounting inventory fair value step-up adjustment				200,000		600,000
Pre-tax restructuring expenses				200,000		200,000
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				20,800,000		35,900,000
Operating income of acquiree since acquisition date				1,500,000		2,000,000
Purchase accounting inventory fair value step-up adjustment				$ 300,000		$ 500,000
Payments to acquire business		102,700,000
Investment in joint venture		$ 616,000
Reclassification from cost of sales					500,000		800,000
Reclassification to net sales					500,000		800,000
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					1,200,000		2,300,000
Depreciation expense					500,000		1,000,000
Interest expense					500,000		900,000
Texel Brand and Gutsche | Acquisition-related Costs
Business Acquisition [Line Items]
Net income					$ 1,500,000		$ 2,100,000