Goodwill and Other Intangible Assets (Intangible Assets By Line of Business) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	$ 69,051	$ 71,173
Completion and Remedial Services
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	51,280
Well Servicing
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	6,019
Fluid Services
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	8,722
Contract Drilling
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	$ 3,030