Premises and equipment (Details) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property and equipment [Abstract]
Total premises and equipment	$ 19,075,416	$ 34,161,569
Less: Accumulated depreciation and amortization	(6,666,429)	(8,346,227)
Premises and equipment, net	12,408,987	25,815,342
Depreciation and amortization	1,311,000	1,366,000	1,418,000
Land [Member]
Property and equipment [Abstract]
Total premises and equipment	3,802,952	6,190,561
Buildings and Improvements [Member]
Property and equipment [Abstract]
Total premises and equipment	6,499,746	20,385,517
Furniture, Fixtures and Equipment [Member]
Property and equipment [Abstract]
Total premises and equipment	$ 8,772,718	$ 7,585,491

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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