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Debt - Outstanding Indebtedness (Details)				6 Months Ended
	Aug. 09, 2022	Jul. 19, 2022 USD ($)	Aug. 31, 2021 USD ($)	Jun. 30, 2022 USD ($) extension	Dec. 31, 2021 USD ($)
Debt
Duration used in interest rate calculation (in days)				360 days
One Westside and 10850 Pico | VIE, primary beneficiary
Debt
VIE, ownership Interest				75.00%
Periodic payment, debt service payment term				10 years
Interest Rate Swaps | Designated as hedging Instrument
Debt
Notional Amount				$ 100,000,000	$ 500,000,000
Hollywood Media Portfolio
Debt
VIE, ownership Interest				51.00%
1918 Eighth
Debt
VIE, ownership Interest				55.00%
Hill7
Debt
VIE, ownership Interest				55.00%
Hollywood Media Portfolio | Interest Rate Swaps | Designated as hedging Instrument
Debt
Notional Amount				$ 350,000,000
Hollywood Media Portfolio D | Interest Rate Swaps | Designated as hedging Instrument
Debt
Notional Amount				$ 125,000,000
Hollywood Media Portfolio D | LIBOR | Interest Rate Swaps | Designated as hedging Instrument
Debt
Derivative, basis spread on variable rate (in percent)				1.43%
Unsecured debt
Debt
TOTAL				$ 2,410,000,000	2,050,000,000
Unsecured debt | Series A notes
Debt
TOTAL				$ 110,000,000	110,000,000
Interest rate (in percent)				4.34%
Interest rate (in percent)				4.34%
Unsecured debt | Series B notes
Debt
TOTAL				$ 259,000,000	259,000,000
Interest rate (in percent)				4.69%
Interest rate (in percent)				4.69%
Unsecured debt | Series C notes
Debt
TOTAL				$ 56,000,000	56,000,000
Interest rate (in percent)				4.79%
Interest rate (in percent)				4.79%
Unsecured debt | Series D notes
Debt
TOTAL				$ 150,000,000	150,000,000
Interest rate (in percent)				3.98%
Interest rate (in percent)				3.98%
Unsecured debt | Series E notes
Debt
TOTAL				$ 50,000,000	50,000,000
Interest rate (in percent)				3.66%
Interest rate (in percent)				3.66%
Unsecured debt | 3.95% Registered senior notes
Debt
TOTAL				$ 400,000,000	400,000,000
Interest rate (in percent)				3.95%
Interest rate (in percent)				3.95%
Unsecured debt | 4.65% Registered senior notes
Debt
TOTAL				$ 500,000,000	500,000,000
Interest rate (in percent)				4.65%
Interest rate (in percent)				4.65%
Unsecured debt | 3.25% Registered senior notes
Debt
TOTAL				$ 400,000,000	400,000,000
Interest rate (in percent)				3.25%
Interest rate (in percent)				3.25%
Unsecured debt | Revolving credit facility
Debt
TOTAL				$ 485,000,000	125,000,000
Maximum borrowing capacity				$ 1,000,000,000
Extension term (in years)				6 months
Unsecured debt | Revolving credit facility | Subsequent event
Debt
Repayments of debt		$ 20,000,000
Unsecured debt | Revolving credit facility | GBP
Debt
Maximum borrowing capacity				$ 250,000,000
Unsecured debt | Revolving credit facility | CAD
Debt
Maximum borrowing capacity				$ 250,000,000
Unsecured debt | Revolving credit facility | Minimum
Debt
Commitment fee (in percent)				0.15%
Unsecured debt | Revolving credit facility | Maximum
Debt
Commitment fee (in percent)				0.30%
Unsecured debt | Revolving credit facility | LIBOR
Debt
Basis spread on variable rate (in percent)				1.20%
Unsecured debt | Revolving credit facility | LIBOR | Minimum
Debt
Basis spread on variable rate (in percent)				1.05%
Unsecured debt | Revolving credit facility | LIBOR | Maximum
Debt
Basis spread on variable rate (in percent)				1.50%
Secured debt
Debt
TOTAL				$ 1,744,200,000	1,714,874,000
Secured debt | Hollywood Media Portfolio
Debt
TOTAL				890,186,000	890,186,000
Debt instrument, face amount				$ 1,100,000,000	1,100,000,000
Debt instrument, number of extension options | extension				3
Extension term (in years)				1 year
Payments to acquire bonds			$ 209,800,000
Secured debt | Hollywood Media Portfolio | Maximum
Debt
Interest rate (in percent)				4.67%
Interest rate (in percent)				4.67%
Secured debt | Hollywood Media Portfolio | LIBOR
Debt
Basis spread on variable rate (in percent)				1.17%
Secured debt | Hollywood Media Portfolio | LIBOR | Forecast | Subsequent event
Debt
Basis spread on variable rate (in percent)	0.99%
Secured debt | Acquired Hollywood Media Portfolio debt
Debt
Acquired Hollywood Media Portfolio debt				$ (209,814,000)	(209,814,000)
Secured debt | Acquired Hollywood Media Portfolio debt | LIBOR
Debt
Basis spread on variable rate (in percent)				1.55%
Secured debt | One Westside and 10850 Pico
Debt
TOTAL				$ 270,714,000	241,388,000
Maximum borrowing capacity				$ 414,600,000
Secured debt | One Westside and 10850 Pico | LIBOR
Debt
Basis spread on variable rate (in percent)				1.70%
Secured debt | Element LA
Debt
TOTAL				$ 168,000,000	168,000,000
Interest rate (in percent)				4.59%
Interest rate (in percent)				4.59%
Secured debt | 1918 Eighth
Debt
TOTAL				$ 314,300,000	314,300,000
Secured debt | 1918 Eighth | LIBOR
Debt
Basis spread on variable rate (in percent)				1.30%
Secured debt | Hill7
Debt
TOTAL				$ 101,000,000	101,000,000
Interest rate (in percent)				3.38%
Interest rate (in percent)				3.38%
Unsecured and Secured Debt
Debt
TOTAL				$ 4,154,200,000	3,764,874,000
Deferred financing costs and discounts, net				(25,166,000)	(30,971,000)
Debt				4,129,034,000	3,733,903,000
In-substance defeased debt
Debt
TOTAL				126,397,000
Debt				$ 126,397,000	128,212,000
Interest rate (in percent)				4.47%
Interest rate (in percent)				4.47%
Joint venture partner debt
Debt
TOTAL				$ 66,136,000
Debt				$ 66,136,000	$ 66,136,000
Interest rate (in percent)				4.50%
Debt instrument, number of extension options | extension				2
Extension term (in years)				2 years
Interest rate (in percent)				4.50%

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