Finance Receivables (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Grower receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross receivable	$ 42,138	$ 46,188	$ 54,648
Reserve	(36,837)	(37,519)	(37,923)
Net receivable	5,301	8,669	16,725
Current portion, net	5,301	8,669	16,725
Long-term portion, net	0	0	0
Seller financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross receivable	31,332	35,021	36,155
Reserve	0	0	0
Net receivable	31,332	35,021	36,155
Current portion, net	3,620	4,771	5,091
Long-term portion, net	$ 27,712	$ 30,250	$ 31,064