SCHEDULE IV (Details) - USD ($)		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]
Number of Loans	[1]	2
Non-recourse first mortgage loan Face Amount, Total mortgage		$ 4,752,000
Carrying Amount of Mortgages	[2],[3]	4,752,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	[4]	0
Changes in the mortgage loans [Roll Forward]
Income Tax Basis of Mortgage Loans on Real Estate		$ 4,750,000
First Mortgage [Member]
Mortgage Loans on Real Estate [Line Items]
Effective interest rate (in hundredths)		5.25%
Changes in the mortgage loans [Roll Forward]
Balance at beginning of year		$ 4,875,000	$ 4,991,000	$ 8,870,000
Advances on mortgage loans receivable		0	0	0
Payments on mortgage loans receivable		(123,000)	(116,000)	(3,902,000)
Amortization of discount on mortgage loan receivable		0	0	23,000
Balance at end of year		$ 4,752,000	$ 4,875,000	$ 4,991,000
JCB Limited - California - A [Member] | First Mortgage [Member] | Buildings [Member]
Mortgage Loans on Real Estate [Line Items]
Number of Loans		1
Stated interest rate (in hundredths)		5.25%
Periodic Payment Terms		Principal and interest due monthly
Non-recourse first mortgage loan Face Amount, Total mortgage		$ 1,927,000
Carrying Amount of Mortgages		1,927,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	[4]	$ 0
JCB Limited - California - B [Member] | First Mortgage [Member] | Buildings [Member]
Mortgage Loans on Real Estate [Line Items]
Number of Loans		1
Stated interest rate (in hundredths)		5.25%
Periodic Payment Terms		Principal and interest due monthly
Non-recourse first mortgage loan Face Amount, Total mortgage		$ 2,825,000
Carrying Amount of Mortgages		2,825,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	[4]	$ 0

[1] Reference is made to allowance for possible losses on mortgage loans receivable in the Notes to Consolidated Financial Statements.

[2] Changes in mortgage loans follow: Years Ended December 31,2016 2015 2014(In thousands)Balance at beginning of year$4,875 4,991 8,870Advances on mortgage loans receivable— — —Payments on mortgage loans receivable(123) (116) (3,902)Amortization of discount on mortgage loan receivable— — 23Balance at end of year$4,752 4,875 4,991

[3] The aggregate cost for federal income tax purposes is approximately $4.75 million. The federal income tax return for the year ended December 31, 2016, has not been filed and, accordingly, the income tax basis of mortgage loans as of December 31, 2016, is based on preliminary data.

[4] Interest in arrears for three months or less is disregarded in computing principal amount of loans subject to delinquent interest.