Acquisitions (Detail) (USD $)	0 Months Ended			3 Months Ended			1 Months Ended
	Dec. 16, 2013 Black Hawk Energy Services, Inc.	Mar. 31, 2014 Black Hawk Energy Services, Inc.	Dec. 16, 2013 Customer relationships Black Hawk Energy Services, Inc.	Mar. 31, 2014 Trade names Black Hawk Energy Services, Inc.	Dec. 16, 2013 Trade names Black Hawk Energy Services, Inc.	Dec. 16, 2013 Non-compete agreement Black Hawk Energy Services, Inc.	Feb. 28, 2014 UK Elite Soccer, Inc. Provider of Soccer Clinics
Intangible assets		$ 12,160,000	$ 11,300,000		$ 800,000	$ 100,000	$ 500,000
Amortization period (in years)				5 years
Consideration transferred	$ 60,800,000						$ 500,000