Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $)	0 Months Ended
May 08, 2014	May 01, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]
Outstanding senior notes acquired	$ 9,291,000
Outstanding Senior Notes Acquired for Aggregate Price	9,738,000
Proceeds from sale of interest in real estate property		$ 31,100,000

Cash received for the sale of real estate that is not part of an investing activity during the current period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration