Acquisitions - Purchase Price Allocation (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Black Hawk Energy Services, Inc.	Dec. 16, 2013 Black Hawk Energy Services, Inc. Previously Reported	Mar. 31, 2014 Black Hawk Energy Services, Inc. Measurement Period Adjustments
Accounts receivable				$ 9,623	$ 9,663	$ (40)
Prepaid expenses and other current assets				628	208	420
Property and equipment				30,674	30,581	93
Intangible assets				12,160	0	12,160
Accounts payable				(1,584)	(1,333)	(251)
Accrued expenses				(1,923)	(1,756)	(167)
Total identifiable net assets acquired				49,578	37,363	12,215
Goodwill	68,139	68,139	53,093	11,185	23,400	(12,215)
Net assets acquired				$ 60,763	$ 60,763	$ 0