Summary of Significant Accounting Policies (Changes in Carrying Amount of Goodwill) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended					6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Completion And Remedial Services [Member]	Dec. 31, 2013 Completion And Remedial Services [Member]	Jun. 30, 2014 Well Servicing [Member]	Dec. 31, 2013 Well Servicing [Member]	Jun. 30, 2014 Fluid Services [Member]
Goodwill [Line Items]
Balance as of December 31, 2013	$ 110,914	$ 77,697	$ 77,697	$ 6,622	$ 6,622	$ 26,595
Goodwill adjustments	1,369					1,369
Balance as of June 30, 2014	$ 112,283	$ 77,697	$ 77,697	$ 6,622	$ 6,622	$ 27,964