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Derivative Instruments and Hedging Activities (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) derivative	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) derivative	Sep. 30, 2020 USD ($)	Apr. 14, 2021 USD ($)	Dec. 31, 2020 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Number of interest rate swap agreements | derivative	4		4
Interest rate cap/swap agreements	$ 2,775	$ 2,812	$ 8,208	$ (1,838)
Swaps
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Number of interest rate swap agreements | derivative	4		4
Swaps | Santa Monica Place
Derivatives, Fair Value
Outstanding balance to fixed rate	$ 300,000		$ 300,000		$ 300,000
Level 2 measurement | Cap
Derivatives, Fair Value
Notional Amount	300,000		300,000
Fair Value	$ 0		$ 0			$ 0
Level 2 measurement | Cap | LIBOR
Derivatives, Fair Value
LIBOR Rate	4.00%		4.00%
Level 2 measurement | Swaps
Derivatives, Fair Value
Notional Amount	$ 400,000		$ 400,000
Fair Value	$ 0		$ 0			$ (8,208)
Level 2 measurement | Swaps | LIBOR
Derivatives, Fair Value
LIBOR Rate	2.85%		2.85%

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

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Nominal or face amount used to calculate payment on derivative.

+ References

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-SubTopic 10
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The number of derivative instruments of a particular group held by the entity.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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