Summary of Significant Accounting Policies (Intangibles, net line of business) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	$ 66,745	$ 71,173
Completion and Remedial Services
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	49,627
Well Servicing
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	5,889
Fluid Services
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	8,303
Contract Drilling
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	$ 2,926