Schedule of Mortgage Loan on Real Estate (Detail) (Long-Term First Mortgage Loan, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Mortgage Loans on Real Estate [Line Items]
Periodic Payment Terms	Payable in monthly installments of interest plus principal payable in full at maturity
Prior Liens
Face Amount of Mortgages	368,650
Carrying Amount of Mortgages	368,650	[1]
Principal Amount of Loans Subject to Delinquent Principal or Interest
Desert Valley Hospital
Mortgage Loans on Real Estate [Line Items]
Interest rate	10.40%
Final Maturity Date	2022
Prior Liens		[2]
Face Amount of Mortgages	70,000
Carrying Amount of Mortgages	70,000	[1]
Principal Amount of Loans Subject to Delinquent Principal or Interest		[3]
Desert Valley Hospital
Mortgage Loans on Real Estate [Line Items]
Interest rate	11.20%
Final Maturity Date	2022
Prior Liens		[2]
Face Amount of Mortgages	20,000
Carrying Amount of Mortgages	20,000	[1]
Principal Amount of Loans Subject to Delinquent Principal or Interest		[3]
Chino Valley Medical Center
Mortgage Loans on Real Estate [Line Items]
Interest rate	10.40%
Final Maturity Date	2022
Prior Liens		[2]
Face Amount of Mortgages	50,000
Carrying Amount of Mortgages	50,000	[1]
Principal Amount of Loans Subject to Delinquent Principal or Interest		[3]
Paradise Valley Hospital
Mortgage Loans on Real Estate [Line Items]
Interest rate	10.10%
Final Maturity Date	2022
Prior Liens		[2]
Face Amount of Mortgages	25,000
Carrying Amount of Mortgages	25,000	[1]
Principal Amount of Loans Subject to Delinquent Principal or Interest		[3]
Ernest Mortgage Loan
Mortgage Loans on Real Estate [Line Items]
Interest rate	9.00%	[4]
Final Maturity Date	2032	[4]
Prior Liens		[2],[4]
Face Amount of Mortgages	100,000	[4]
Carrying Amount of Mortgages	100,000	[1],[4]
Principal Amount of Loans Subject to Delinquent Principal or Interest		[3],[4]
Centinela Hospital Medical Center
Mortgage Loans on Real Estate [Line Items]
Interest rate	10.30%
Final Maturity Date	2022
Prior Liens		[2]
Face Amount of Mortgages	100,000
Carrying Amount of Mortgages	100,000	[1]
Principal Amount of Loans Subject to Delinquent Principal or Interest		[3]
Denham Springs LTACH
Mortgage Loans on Real Estate [Line Items]
Interest rate	5.00%
Final Maturity Date	2013
Prior Liens		[2]
Face Amount of Mortgages	3,650
Carrying Amount of Mortgages	3,650	[1]
Principal Amount of Loans Subject to Delinquent Principal or Interest		[3]

[1] The aggregate cost for Federal income tax purposes is $368,650.

[2] There were no prior liens on loans as of December 31, 2012.

[3] The mortgage loan was not delinquent with respect to principal or interest.

[4] Mortgage loans on four properties.