Goodwill and Identified Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 285,247	$ 249,726
Accumulated Amortization	(83,174)	(75,608)
Net Carrying Amount	$ 202,073	174,118
License Agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	9 years 6 months
Gross Carrying Amount	$ 4,451	3,893
Accumulated Amortization	(3,361)	(3,275)
Net Carrying Amount	$ 1,090	618
Leases
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	11 years 1 month 2 days
Gross Carrying Amount	$ 2,065	2,065
Accumulated Amortization	(838)	(764)
Net Carrying Amount	$ 1,227	1,301
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	14 years 25 days
Gross Carrying Amount	$ 24,124	22,519
Accumulated Amortization	(7,055)	(6,262)
Net Carrying Amount	$ 17,069	16,257
Non-competes
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	2 years 25 days
Gross Carrying Amount	$ 1,316	1,210
Accumulated Amortization	(999)	(945)
Net Carrying Amount	$ 317	265
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	11 years 10 months 17 days
Gross Carrying Amount	$ 185,363	164,779
Accumulated Amortization	(47,798)	(41,967)
Net Carrying Amount	$ 137,565	122,812
Patents and acquired technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	9 years 10 months 25 days
Gross Carrying Amount	$ 67,928	55,260
Accumulated Amortization	(23,123)	(22,395)
Net Carrying Amount	44,805	$ 32,865
Underground Solutions | Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	1,500
Underground Solutions | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	19,700
Underground Solutions | Patents and acquired technology
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	12,500
Fyfe Europe | Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	100
Fyfe Europe | Non-competes
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	100
Fyfe Europe | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	300
LMJ | License Agreements
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	600
LMJ | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	$ 200