Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_SecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Financing Activity - Timing of Principal Payments and Terms of Mortgage Loans (Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 10, 2021	Dec. 31, 2021	Dec. 31, 2020
Real Estate Properties [Line Items]
Mortgage loans payable, net		$ 851,283	$ 884,503
Mortgage Loan \| Valley View Mall
Real Estate Properties [Line Items]
Mortgage loans payable, net			$ 27,200
Commercial Real Estate \| Mortgage Loan \| Valley View Mall
Real Estate Properties [Line Items]
Mortgage loans payable, net		$ 27,200
Commercial Real Estate \| Mortgage Loan \| Woodland Mall
Real Estate Properties [Line Items]
Mortgage loans payable, net	$ 113,800
Debt instrument maturity period	2022-12