Equity Investment (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012 Directors	Jun. 30, 2012 Directors
Equity Investment (Textual) [Abstract]
Voting interest	26.50%	26.50%
Right to appoint number of directors	2	2
Gain for increase in market price	$ (6,636)	$ (2,467)