Real Estate and Loans Receivable - Gilbert Facility - Additional Information (Detail) (Gilbert, AZ [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Gilbert, AZ [Member]
Significant Acquisitions and Disposals [Line Items]
Business acquisition cost of acquired entity	$ 17.1
Rent receivables	$ 0.9

Future rental payments receivable within one year of the balance sheet date under an operating lease.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant