Schedule - Mortgage Loans on Real Estate - Conventional Loans (Parenthetical) (Detail) (Conventional Loans [Member], USD $)	Dec. 31, 2013
Mortgage Loans on Real Estate [Line Items]
General reserves	$ 1,245,000
Cost basis of mortgage loans for federal income tax purposes	172,183,000
Texas [Member]
Mortgage Loans on Real Estate [Line Items]
Loans face value	3,116,000
Loans valuation reserve	812,000
Other One [Member]
Mortgage Loans on Real Estate [Line Items]
Loans face value	1,032,000
Loans valuation reserve	$ 573,000

Amount of the contractual principal due at the origination of the mortgage loan (face amount).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule IV)

-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29)

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

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