Dividend Reinvestment and Stock Purchase Plan (Details) (USD $)	3 Months Ended	25 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013
Dividend Reinvestment and Stock Purchase Plan
Authorized common shares to be issued	6,000,000
Number of common shares issued	18,237	21,012	133,440
Amount raised from shares issued	$ 811,000	$ 774,000	$ 5,000,000

Amount of cash inflow from capital contributions to an entity associated with a dividend reinvestment plan and stock purchase plan.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration