Goodwill and Other Intangible Assets - Intangible Assets, net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Cost	$ 61,621	$ 60,695
Accumulated Amortization	(23,604)	(16,257)
Net	38,017	44,438
Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	59,410	59,410
Accumulated Amortization	(23,024)	(16,015)
Net	36,386	43,395
Sports segment:
Finite-Lived Intangible Assets [Line Items]
Cost	2,211	1,285
Accumulated Amortization	(580)	(242)
Net	1,631	1,043
Customer relationships | Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	54,430	54,430
Accumulated Amortization	(19,999)	(13,700)
Net	34,431	40,730
Customer relationships | Sports segment:
Finite-Lived Intangible Assets [Line Items]
Cost	2,089	1,163
Accumulated Amortization	(550)	(230)
Net	1,539	933
Trade names | Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	4,860	4,860
Accumulated Amortization	(3,006)	(2,315)
Net	1,854	2,545
Trade names | Sports segment:
Finite-Lived Intangible Assets [Line Items]
Cost	122	122
Accumulated Amortization	(30)	(12)
Net	92	110
Non-compete agreement | Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	120	120
Accumulated Amortization	(19)	0
Net	$ 101	$ 120