Goodwill and Other Intangible Assets (Intangibles, net line of business) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	$ 69,001	$ 71,173
Completion and Remedial Services
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	50,936
Well Servicing
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	5,268
Fluid Services
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	9,558
Contract Drilling
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, net	$ 3,239