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Fair Value (Quantitative information about impaired loans) (Details) - Discounted appraisal value [Member] - Level 3 [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discounted appraisal value at fair value	$ 29,280	$ 15,956
Loans Receivable, Collateralized By Livestock [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	30.00%	30.00%
Real Estate [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	20.00%	20.00%
Real Estate [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	30.00%	30.00%
Equipment [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	20.00%	20.00%
Equipment [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	40.00%	35.00%
Loans Receivable, Collateralized By Accounts Receivable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount		50.00%
Loans Receivable, Collateralized By Accounts Receivable [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	25.00%
Loans Receivable, Collateralized By Accounts Receivable [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	50.00%
Cash crop inventory [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	30.00%	30.00%
Cash crop inventory [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	40.00%	40.00%
Loans Receivable, Collateralized By Other Inventory [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	50.00%	50.00%
Loans Receivable, Collateralized By Other Inventory [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	75.00%	75.00%
Liquor License [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	75.00%	75.00%
Furniture and Fixtures [Member] | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	35.00%	35.00%
Furniture and Fixtures [Member] | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
ImpairedFinancingReceivableFairValueDisclosureAppraisedValueDiscount	45.00%	45.00%

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