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Accrued Expenses - Summary of Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Payables And Accruals [Abstract]    
Salaries and related costs $ 7,332 $ 11,686
Group health insurance claims 2,537 2,023
Credit balances and overpayments due to patients and payors 1,596 2,371
Dividends payable to common shareholders 1,464  
Other 4,218 4,545
Total $ 17,147 $ 20,625