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Exit Activities (Detail) (USD $)
3 Months Ended 9 Months Ended 4 Months Ended 6 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Apr. 30, 2013
Alaska and Washington Care Centers [Member]
Jun. 30, 2013
Unconsolidated Joint Venture [Member]
Sep. 30, 2013
Georgia Care Centers [Member]
Sep. 30, 2013
Severance [Member]
Sep. 30, 2013
Intangible Assets Write-Off [Member]
Sep. 30, 2013
Lease Termination [Member]
Restructuring Cost and Reserve [Line Items]                    
Other Restructuring Costs               $ 700,000 $ 2,500,000 $ 800,000
Gains (Losses) on Sales of Assets 1,451,000 0 1,808,000 0 1,000,000 (700,000) 1,400,000      
Proceeds from Divestiture of Business     $ 3,725,000 $ 0 $ 1,600,000 $ 500,000 $ 1,600,000