Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended				9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Completion and Remedial Services	Sep. 30, 2014 Well Servicing	Dec. 31, 2013 Well Servicing	Sep. 30, 2014 Fluid Services
Goodwill [Line Items]
Balance as of December 31, 2013	$ 110,914	$ 77,697	$ 6,622	$ 6,622	$ 26,595
Goodwill additions	1,800	315			1,485
Balance as of September 30, 2014	$ 112,714	$ 78,012	$ 6,622	$ 6,622	$ 28,080