Equity Income from Unconsolidated Subsidiaries (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Equity Income from Unconsolidated Subsidiaries (Textual) [Abstract]
Share of members' equity of unconsolidated subsidiary	33.33%		33.33%
Equity income from unconsolidated subsidiaries	$ 374,000	$ 431,000	$ 1,853,000	$ 596,000
Revenue from subcontract agreement	100,000	200,000	400,000	1,500,000
Receivables or unbilled revenues from unconsolidated subsidiary	0		0		0
LTM [Member]
Equity Income from Unconsolidated Subsidiaries (Textual) [Abstract]
Equity income from unconsolidated subsidiaries	$ 300,000	$ 500,000	$ 1,800,000	$ 700,000