Debt (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Debt	$ 147,895,000	$ 136,767,000
Agribusiness term loan
Debt Instrument [Line Items]
Stated interest rate (percent)	4.75%
Line of credit, amount outstanding	79,058,000	83,533,000
Agribusiness working capital debt
Debt Instrument [Line Items]
Stated interest rate (percent)	6.00%
Line of credit, amount outstanding	9,350,000	4,750,000
Other agribusiness debt
Debt Instrument [Line Items]
Stated interest rate (percent)	4.99%
Line of credit, amount outstanding	135,000	159,000
Swiss debt \| 3.7% Loan Due in 2014
Debt Instrument [Line Items]
Stated interest rate (percent)	3.70%
Line of credit, amount outstanding		14,012,000
Swiss debt \| 3.8% Loan Due in 2014
Debt Instrument [Line Items]
Stated interest rate (percent)	3.80%
Line of credit, amount outstanding		3,363,000
Mortgage debt \| 3.19% to 4.75% Loan Due in 2016
Debt Instrument [Line Items]
Mortgages	49,614,000	17,307,000
Mortgage debt \| 5% to 5.5% Loan Due from 2014 to 2016
Debt Instrument [Line Items]
Mortgages	8,134,000	11,491,000
Mortgage debt \| 6% to 6.5% Loan Due Through 2036
Debt Instrument [Line Items]
Mortgages		548,000
Mortgage debt \| 10% Loan Due Through 2017
Debt Instrument [Line Items]
Stated interest rate (percent)	10.00%
Mortgages	1,604,000	1,604,000
Real Estate Operations \| Line of Credit
Debt Instrument [Line Items]
Unused borrowing capacity	67,300,000
Agribusiness Operations \| Line of Credit
Debt Instrument [Line Items]
Debt service coverage ratio covenant (ratio), minimum going forward	1.25
Debt Instrument, Covenant, Percentage of Collateral Called Upon Breach	105.00%
Unused borrowing capacity	17,700,000
Line of credit, amount outstanding	$ 88,500,000
Minimum \| Mortgage debt \| 3.19% to 4.75% Loan Due in 2016
Debt Instrument [Line Items]
Stated interest rate (percent)	3.19%
Minimum \| Mortgage debt \| 5% to 5.5% Loan Due from 2014 to 2016
Debt Instrument [Line Items]
Stated interest rate (percent)	5.00%
Minimum \| Mortgage debt \| 6% to 6.5% Loan Due Through 2036
Debt Instrument [Line Items]
Stated interest rate (percent)	6.00%
Maximum \| Mortgage debt \| 3.19% to 4.75% Loan Due in 2016
Debt Instrument [Line Items]
Stated interest rate (percent)	4.75%
Maximum \| Mortgage debt \| 5% to 5.5% Loan Due from 2014 to 2016
Debt Instrument [Line Items]
Stated interest rate (percent)	5.50%
Maximum \| Mortgage debt \| 6% to 6.5% Loan Due Through 2036
Debt Instrument [Line Items]
Stated interest rate (percent)	6.50%

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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