General - Additional Information (Details) $ in Thousands, € in Millions, NZD in Millions									1 Months Ended		3 Months Ended	9 Months Ended			12 Months Ended
	Jul. 01, 2016 NZD company	Jul. 01, 2016 USD ($) company	Jun. 02, 2016 EUR (€)	Jun. 02, 2016 USD ($)	May 13, 2016 USD ($)	Feb. 18, 2016 USD ($)	Feb. 01, 2016 USD ($)	Mar. 01, 2015 USD ($)	Jul. 31, 2015 USD ($)	Feb. 28, 2015 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2016 NZD country	Sep. 30, 2016 USD ($) country	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jul. 01, 2016 USD ($)
General [Line Items]
Contingent consideration payment													$ 500	$ 684
Restructuring Plan 2016
General [Line Items]
Impact on earnings													17,000
CSL and BCS [Member]
General [Line Items]
Number of companies acquired | company	2	2
Total consideration recorded	NZD 8.9	$ 6,400
Amount held in escrow | NZD	0.5
Milestone payments												NZD 2.0	$ 1,400
Cash payments to acquire business	7.5	5,400
Working capital adjustment	0.2	$ 100
Estimated earnout consideration	NZD 1.2															$ 900
LMJ
General [Line Items]
Total consideration recorded			€ 2.9	$ 3,235
Fyfe Europe
General [Line Items]
Total consideration recorded					$ 3,000
Number of countries in which entity operates | country												72	72
Cash payments to acquire business					2,800
Contingent consideration paid					$ 200
Schultz Mechanical Contractors, Inc.
General [Line Items]
Total consideration recorded								$ 7,662
Cash payments to acquire business								6,700
Purchase price								7,100
Working capital adjustment								400
Adjustment to account for deferred consideration								$ 1,000
Contingent consideration paid											$ 500
Underground Solutions
General [Line Items]
Total consideration recorded						$ 88,370
Cash payments to acquire business						85,000
Discounted value of net operating loss tax assets						5,000
Consideration transferred, funds held in escrow						6,300
Foreign earnings repatriated						30,400
Foreign earnings repatriated, tax impact						3,500
Working capital adjustment						$ (1,600)
CRTS
General [Line Items]
Contingent consideration payment									$ 1,000
Proceeds from settlement of escrow claims									$ 700
CRTS | Operating Expense
General [Line Items]
Proceeds from settlement of escrow claims														200
CRTS | Other Operating Income (Expense)
General [Line Items]
Proceeds from settlement of escrow claims														$ 800
Video Injection - Instituform SAS
General [Line Items]
Exclusive tube supply agreement										5 years
Loss on disposition of business										$ 2,900
Bayou Perma-Pipe Canada, Ltd
General [Line Items]
Ownership interest							51.00%
Consideration received							$ 9,600
Proceeds from divestiture							7,600
Disposal, note receivable							$ 2,000
Expected loss from disposal, before tax															$ 600