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ACCRUED EXPENSES (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Payables and Accruals [Abstract]    
Salaries and related costs $ 12,202 $ 9,414
Group health insurance claims 2,496 2,276
Credit balances due to patients and payers 1,446 1,472
Other 4,540 3,434
Total $ 20,684 $ 16,596