Goodwill and Other Intangible Assets - Intangible Assets, net (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Cost	$ 61,618	$ 60,695
Accumulated Amortization	(21,331)	(16,257)
Net	40,287	44,438
Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	59,410	59,410
Accumulated Amortization	(20,884)	(16,015)
Net	38,526	43,395
Sports segment:
Finite-Lived Intangible Assets [Line Items]
Cost	2,208	1,285
Accumulated Amortization	(447)	(242)
Net	1,761	1,043
Customer relationships | Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	54,430	54,430
Accumulated Amortization	(18,051)	(13,700)
Net	36,379	40,730
Customer relationships | Sports segment:
Finite-Lived Intangible Assets [Line Items]
Cost	2,086	1,163
Accumulated Amortization	(423)	(230)
Net	1,663	933
Trade names | Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	4,860	4,860
Accumulated Amortization	(2,820)	(2,315)
Net	2,040	2,545
Trade names | Sports segment:
Finite-Lived Intangible Assets [Line Items]
Cost	122	122
Accumulated Amortization	(24)	(12)
Net	98	110
Non-compete agreement | Energy segment:
Finite-Lived Intangible Assets [Line Items]
Cost	120	120
Accumulated Amortization	(13)	0
Net	$ 107	$ 120