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Loans Receivable (Details) (USD $)
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1 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
loan
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2011
NHP
property
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Dec. 21, 2012
Secured and unsecured loans
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Dec. 31, 2012
Secured loans
loan
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Dec. 31, 2011
Secured loans
loan
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Dec. 31, 2012
Unsecured loans
loan
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Dec. 31, 2011
First mortgage loan maturing in 2016 [Member]
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| Accounts, Notes, Loans and Financing Receivable | ||||||||||
| Secured loans receivable, net | $ 697,100,000 | $ 697,100,000 | $ 276,200,000 | |||||||
| Number of secured loans made | 2 | |||||||||
| Loans receivable, aggregate principal amount | 425,000,000 | |||||||||
| Loans receivable, weighted average interest rate | 8.50% | |||||||||
| Proceeds from loans receivable | 43,219,000 | 220,179,000 | 19,291,000 | 37,600,000 | 218,500,000 | |||||
| Number of secured loans repaid | 3 | 8 | 4 | |||||||
| Mortgage loans receivable | 271,700,000 | |||||||||
| Number of Properties Held as Security | 53 | |||||||||
| Other unsecured loans | 60,500,000 | |||||||||
| Principal amount of mortgage debt | 12,900,000 | |||||||||
| Interest rate on loans issued (as a percent) | 9.00% | |||||||||
| Gain (loss) on repayment of loans receivable | $ 4,400,000 | |||||||||