Business Acquisitions (Details Textual) (USD $)		12 Months Ended		12 Months Ended				12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010 B4 Grain, Inc [Member] bushels	Dec. 31, 2011 B4 Grain, Inc [Member]	Dec. 31, 2010 O Malley Grain Inc [Member]	Dec. 31, 2011 O Malley Grain Inc [Member]	May 01, 2010 O Malley Grain Inc [Member]	Oct. 31, 2011 Immokalee Farmers Supply Inc [Member]	Dec. 31, 2010 Non-compete agreement [Member] B4 Grain, Inc [Member]	Dec. 31, 2010 Grower's list [Member] O Malley Grain Inc [Member]	Dec. 31, 2010 Customer lists [Member] B4 Grain, Inc [Member]	Dec. 31, 2010 Customer lists [Member] Non-compete agreement [Member] O Malley Grain Inc [Member]
Business Acquisitions (Textual) [Abstract]
Total Purchase Price		$ 35,100,000				$ 7,800,000	$ 3,000,000
Other long-term liabilities	126,000		0		126,000		600,000
Number of storage facilities				2
Number of grain elevators		3
Cash paid for acquisition		31,500,000
Combined storage capacity of the equipment		1,900,000
Storage capacity for acquired assets by lease		1,100,000
Goodwill recognized in respect of acquisitions	4,081,000	2,900,000	2,850,000	1,200,000	1,231,000
Amount of remained accounts payable		800,000
Earn-out provision remained		2,800,000
Intangible Assets	1,725,000		350,000		1,375,000			100,000	300,000	300,000	1,100,000
Period for amortization of intangible assets								5 years	3 years	3 years	5 years
Additional earn out provision		3,500,000
Period of achieve certain level of income		5 years
Estimated fair value of contingent liability		2,800,000
Unpaid initial purchase price		$ 800,000