Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Completion and Remedial Services	Dec. 31, 2012 Completion and Remedial Services	Mar. 31, 2013 Fluid Services	Mar. 31, 2013 Well Servicing	Dec. 31, 2012 Well Servicing
Goodwill [Line Items]
Balance as of December 31, 2012	$ 105,836	$ 79,047	$ 79,047	$ 20,467	$ 6,322	$ 6,322
Goodwill additions	9,895			9,895
Balance as of March 31, 2013	$ 115,731	$ 79,047	$ 79,047	$ 30,362	$ 6,322	$ 6,322