Description of Business - Contributions to Revenues and Profits Since Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Restructuring charges			$ 9,168	$ 968	$ 687
Goodwill impairment	$ 43,500		0	43,484	51,512
Infrastructure Solutions
Business Acquisition [Line Items]
Inventory step up expense			3,600
Goodwill impairment					$ 16,100
Underground Solutions
Business Acquisition [Line Items]
Revenues			29,425
Net income (loss)			(2,694)
Underground Solutions | Infrastructure Solutions
Business Acquisition [Line Items]
Inventory step up expense			3,600
Fyfe Europe
Business Acquisition [Line Items]
Revenues			23
Net income (loss)			(764)
LMJ
Business Acquisition [Line Items]
Revenues			4,865
Net income (loss)			(1,153)
Concrete Solutions
Business Acquisition [Line Items]
Revenues			2,700
Net income (loss)			106
Schultz
Business Acquisition [Line Items]
Revenues			24,702	13,771
Net income (loss)			(1,068)	(1,470)
Restructuring charges			200
Goodwill impairment				$ 1,700
Corporate, Non-Segment | Underground Solutions
Business Acquisition [Line Items]
Net income (loss)			(3,200)
Corporate, Non-Segment | Schultz
Business Acquisition [Line Items]
Net income (loss)		$ (1,000)	$ (2,900)