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Commitments and Contingencies (Details) (USD $)
Sep. 30, 2014
property
Dec. 31, 2013
Other Commitments [Line Items]    
Workers' Compensation and Medical Malpractice Receivable, Current $ 19,157,000 $ 21,200,000
Self Insurance Reserve 11,700,000 11,600,000
Letters of Credit Outstanding, Amount 2,900,000 2,700,000
Contingent consideration maximum 16,000,000  
Liability for Uncertain Tax Positions, Noncurrent 1,600,000 1,600,000
Other 22,444,000 27,926,000
Number of Leased Properties Owned by Related Parties 2  
Discontinued Operations [Member]
    
Other Commitments [Line Items]    
Workers' Compensation and Medical Malpractice Receivable, Current $ 10,700,000 $ 11,100,000