Goodwill and Other Intangible Assets - Goodwill reconciliation (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Balance, beginning of period	$ 67,530	$ 53,093
Acquisitions	0	16,170
Adjustments to fair value	0	1,844
Impairments	0	(3,577)
Balance, end of period	67,530	67,530
Energy segment:
Goodwill [Roll Forward]
Balance, beginning of period	65,359	52,939
Acquisitions	0	10,576
Adjustments to fair value	0	1,844
Impairments	0	0
Balance, end of period	65,359	65,359
Sports segment:
Goodwill [Roll Forward]
Balance, beginning of period	2,171	154
Acquisitions	0	5,594
Adjustments to fair value	0	0
Impairments	0	(3,577)
Balance, end of period	$ 2,171	$ 2,171