Commitments and Contingencies (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Commitments and Contingencies [Abstract]
Estimated expenses and related liabilities for losses incurred not reported to insurance carrier	$ 1,645,000	$ 1,285,000
Accrued medical claims	506,000
Minimum annual individual medical claims for stop loss coverage	100,000
Umbrella insurance coverage	1,000,000
Minimum aggregate medical claims for umbrella insurance coverage	$ 4,500,000