Acquisitions and Divestitures - Acquisitions Narrative (Details) - USD ($)		3 Months Ended								6 Months Ended	12 Months Ended
	Jul. 07, 2016	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 06, 2016
Business Acquisition [Line Items]
Net income/(loss)		$ 13,848,000	$ 10,675,000	$ 13,125,000	$ 11,669,000	$ 4,420,000	$ 12,785,000	$ 10,813,000	$ 9,169,000		$ 49,317,000	$ 37,187,000	$ 46,259,000
Amended Credit Facility | Revolving Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity	$ 175,000,000													$ 100,000,000
Gutsche
Business Acquisition [Line Items]
Percentage of voting interest acquired						100.00%				100.00%		100.00%
Payment to acquire business												$ 57,600,000
Estimated post-closing working capital adjustment												3,000,000
Post-closing adjustment			400,000
Consideration transferred including post-closing adjustment			$ 58,000,000
Purchase price borrowings						$ 31,600,000.0				$ 31,600,000.0		31,600,000.0
Net sales of acquiree since acquisition date											51,500,000
Operating income of acquiree since acquisition date											2,900,000
Purchase accounting inventory fair value step-up adjustment											600,000
Restructuring expenses											200,000
Investment in joint venture						$ 0				0		0
Texel
Business Acquisition [Line Items]
Percentage of voting interest acquired	100.00%
Payment to acquire business	$ 102,700,000
Purchase price borrowings	85,000,000.0
Net sales of acquiree since acquisition date										40,900,000	84,800,000
Operating income of acquiree since acquisition date										2,500,000	6,900,000
Purchase accounting inventory fair value step-up adjustment										$ 2,000,000	500,000
Investment in joint venture	$ 616,000
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
Acquisition-related Costs | Texel
Business Acquisition [Line Items]
Net income/(loss)												4,300,000
Acquisition-related Costs | Texel Brand and Gutsche
Business Acquisition [Line Items]
Net income/(loss)											$ (100,000)	$ (3,700,000)