Goodwill and Intangible - Changes in Goodwill by Business Segment (Details) $ in Thousands	Mar. 31, 2016 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 69,178
Goodwill, Ending Balance	69,178
Infrastructure Services
Goodwill [Line Items]
Goodwill, Beginning Balance	1,882
Goodwill, Ending Balance	1,882
Field Services
Goodwill [Line Items]
Goodwill, Beginning Balance	58,648
Goodwill, Ending Balance	58,648
Professional Services
Goodwill [Line Items]
Goodwill, Beginning Balance	8,648
Goodwill, Ending Balance	$ 8,648