Real Estate and Lending Activities - Leasing Operations - Additional Information (Detail)	9 Months Ended
Sep. 30, 2015 Leases
Ernest Health, Inc [Member]
Business Acquisition [Line Items]
Number of direct financing leases	15
Prime Facilities [Member]
Business Acquisition [Line Items]
Number of direct financing leases	5
Capella Healthcare Inc [Member]
Business Acquisition [Line Items]
Number of direct financing leases	3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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