Goodwill and Intangibles Assets (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Goodwill and intangibles assets (Textual) [Abstract]
Amortization of intangible assets	$ 2,525,000	$ 338,000	$ 4,385,000	$ 1,013,000
Impairment charges	400,000	0	400,000	0
Accumulated Amortization	7,578,000		7,578,000		2,769,000
Customer relationships [Member]
Goodwill and intangibles assets (Textual) [Abstract]
Accumulated Amortization	5,092,000,000		5,092,000,000		2,344,000
ICG Group, Inc [Member]
Goodwill and intangibles assets (Textual) [Abstract]
Amortization of intangible assets	$ 2,500,000	$ 300,000	$ 4,400,000	$ 1,000,000