Goodwill and Other Intangible Assets - Goodwill reconciliation (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Balance at beginning of period	$ 53,093	$ 8,244
Acquisitions	6,075	46,837
Impairments	0	(1,988)
Balance at end of period	59,168	53,093
Steel Sports [Member]
Goodwill [Roll Forward]
Balance at beginning of period	52,939	6,256
Acquisitions	0	46,683
Impairments	0	0
Balance at end of period	52,939	52,939
Steel Energy [Member]
Goodwill [Roll Forward]
Balance at beginning of period	154	1,988
Acquisitions	6,075	154
Impairments	0	(1,988)
Balance at end of period	$ 6,229	$ 154