Commitments and Contingencies (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Commitments and Contingencies [Abstract]
Estimated expenses and related liabilities for losses incurred not reported to insurance carrier	$ 1,595,000	$ 1,545,000
Accrued medical claims	912,000	506,000
Minimum annual individual medical claims for stop loss coverage	100,000
Umbrella insurance coverage	2,000,000
Minimum aggregate medical claims for umbrella insurance coverage for 2013	$ 4,500,000