Equity Investment (Operating Results) (Details) (USD $)	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Equity Investment [Abstract]
Net operating revenue	$ 12,168,000	$ 10,445,000
Net earnings	(287,000)	464,000
Maximum exposure	$ 3,100,000

The amount of net income (loss) reported by an equity method investment of the entity.

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