SCHEDULE IV (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans	[1]	1
Non-recourse first mortgage loan Face Amount, Total mortgage					$ 2,594
Carrying Amount of Mortgages	[2],[3]	$ 2,594			2,594
Principal Amount of Loans Subject to Delinquent Principal or Interest	[4]				0
Changes in the mortgage loans [Roll Forward]
Balance at end of year	[2],[3]	$ 2,594
Income Tax Basis of Mortgage Loans on Real Estate					2,590
First Mortgage [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Final Maturity Date		Dec. 21, 2022	Dec. 21, 2022	Oct. 25, 2017
Effective interest rate (in hundredths)		5.15%	5.15%	5.25%
Carrying Amount of Mortgages		$ 4,581	$ 4,752	$ 4,875	2,594
Changes in the mortgage loans [Roll Forward]
Balance at beginning of year		4,581	4,752	4,875
Payments on mortgage loans receivable		(1,987)	(171)	(123)
Balance at end of year		$ 2,594	$ 4,581	$ 4,752
JCB Limited - California - B [Member] | First Mortgage [Member] | Buildings [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans		1
Stated interest rate (in hundredths)		5.15%
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Final Maturity Date		Dec. 21, 2022
Periodic Payment Terms		Principal and interest due monthly
Non-recourse first mortgage loan Face Amount, Total mortgage					2,594
Carrying Amount of Mortgages		$ 2,594			2,594
Principal Amount of Loans Subject to Delinquent Principal or Interest	[4]				$ 0
Changes in the mortgage loans [Roll Forward]
Balance at end of year		$ 2,594

[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 31,2018 2017 2016(In thousands)Balance at beginning of year$4,581 4,752 4,875Payments on mortgage loans receivable(1,987) (171) (123)Balance at end of year$2,594 4,581 4,752

[3] The aggregate cost for federal income tax purposes is approximately $2.59 million. The federal income tax return for the year ended December 31, 2018, has not been filed and, accordingly, the income tax basis of mortgage loans as of December 31, 2018, 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.