Derivatives - Effect in the Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative financial instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income		$ 197	$ (9,091)	$ (30,930)	$ (45,090)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings	[1]	(2,371)	(665)	(5,792)	(13,408)
Derivatives Designated in Hedging Relationships | Interest rate swaps | Earnings from equity method investments
Derivative financial instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income		598	(6,082)	(15,559)	(21,309)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings		(333)	(126)	(866)	28
Derivatives Designated in Hedging Relationships | Interest rate swaps | Interest expense
Derivative financial instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income		(401)	(3,009)	(15,371)	(23,781)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings		$ (2,038)	$ (539)	$ (4,926)	$ (957)

[1] Amounts reclassified to "Interest expense" in the Company's consolidated statements of operations for the three months ended September 30, 2020 and 2019 are $2,038 and $539, respectively, and amounts reclassified to "Interest expense" in the Company's consolidated statements of operations for the nine months ended September 30, 2020 and 2019 are $4,926 and $957, respectively. Amount reclassified to "Income from sales of real estate" in the Company's consolidated statements of operations is $806 for the nine months ended September 30, 2019. Amounts reclassified to "Earnings (losses) from equity method investments" in the Company's consolidated statements of operations for the three months ended September 30, 2020 and 2019 are $333 and $126, respectively, and amounts reclassified to "Earnings (losses) from equity method investments" in the Company's consolidated statements of operations for the nine months ended September 30, 2020 and 2019 are $866 and $(28), respectively. Amount reclassified to "Other expense" in the Company's consolidated statements of operations is $11,673 for the nine months ended September 30, 2019 resulting from hedged forecasted transactions becoming not probable to occur.