Acquisitions (Detail) (USD $)	3 Months Ended	9 Months Ended					3 Months Ended	9 Months Ended	12 Months Ended		1 Months Ended				9 Months Ended				3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Aug. 23, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013 Ruckus Sports LLC and UK Elite Soccer, Inc. [Member]	Sep. 30, 2013 Ruckus Sports LLC and UK Elite Soccer, Inc. [Member]	Dec. 31, 2012 Ruckus Sports LLC and UK Elite Soccer, Inc. [Member]	Jan. 31, 2013 Ruckus Sports LLC and UK Elite Soccer, Inc. [Member]	Jan. 31, 2013 Ruckus Sports LLC [Member] director	Jul. 31, 2013 Ruckus Sports LLC [Member]	May 31, 2013 Ruckus Sports LLC [Member]	Jun. 19, 2013 UK Elite Soccer, Inc. [Member]	Sep. 30, 2013 Rogue Pressure Services, Inc. [Member]	Jun. 30, 2013 Rogue Pressure Services, Inc. [Member]	Dec. 31, 2012 Rogue Pressure Services, Inc. [Member]	Dec. 31, 2011 Rogue Pressure Services, Inc. [Member]	Sep. 30, 2013 Subsequent Event [Member] Ruckus Sports LLC [Member]	Sep. 30, 2013 Subsequent Event [Member] Ruckus Sports LLC [Member]
Ownership percentage (as a percent)				44.70%							20.00%
Cost of acquired entity, liabilities incurred									$ 100,000
Cost of acquired entity, cash paid									3,100,000
Percentage of voting interests acquired, additional membership interest (as a percent)											40.00%
Period during which Company has the option to acquire additional interest (in years)											2 years
Number of directors appointed (in directors)											2
Number of directors on board (in directors)											3
Control premium (as a percent)											50.00%
Percentage of voting interests acquired (as a percent)												15.00%	10.00%	80.00%
Net revenues			96,961,000																400,000	1,000,000
Operating losses			(23,185,000)																900,000	1,500,000
Net losses after non-controlling interests																			400,000	500,000
Assets		520,071,000			466,495,000														3,900,000	3,900,000
Goodwill		59,164,000			53,093,000	8,244,000				6,071,000									3,500,000	3,500,000
Liabilities		90,657,000			34,533,000														900,000	900,000
Revenue of acquiree since acquisition date, Actual							4,900,000	5,900,000
Earnings or loss of acquiree since acquisition date							300,000	(400,000)
Income benefit, measurement period adjustment	15,100,000	15,100,000	15,100,000
Contingent liability																		1,200,000
Contingent consideration performance period (in years)															3 years
Liabilities arising from contingencies, amount recognized																$ 500,000	$ 700,000