Summary of Significant Accounting Policies (Intangibles, net line of business) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]
Total Amortizable Intangible Assets	$ 71,173	$ 77,555
Completion and Remedial Services
Summary Of Significant Accounting Policies [Line Items]
Total Amortizable Intangible Assets	52,483
Well Servicing
Summary Of Significant Accounting Policies [Line Items]
Total Amortizable Intangible Assets	5,371
Fluid Services
Summary Of Significant Accounting Policies [Line Items]
Total Amortizable Intangible Assets	9,976
Contract Drilling
Summary Of Significant Accounting Policies [Line Items]
Total Amortizable Intangible Assets	$ 3,343