Accumulated Other Comprehensive Income - Summary of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period		$ 3,715,023	$ 3,332,988	$ 3,238,126
Other comprehensive income (loss) before reclassifications		5,300	(34,906)	(19,318)
(Gain) loss reclassified from accumulated other comprehensive loss to net income		12,660	11,836	(1,939)
Pension adjustment		452	(84)	11
Share of investee's other comprehensive income	[1]	5,721	1,002	0
Deconsolidation of 110 North Wacker			12,934
Net current-period other comprehensive income (loss)		24,133	(9,218)	(21,246)
Balance at the end of the period		3,710,670	3,715,023	3,332,988
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period		(38,590)	(29,372)	(8,126)
Pension adjustment		452	(84)	11
Share of investee's other comprehensive income		5,721	1,002
Balance at the end of the period		$ (14,457)	$ (38,590)	$ (29,372)

[1] Amounts are shown net of deferred tax expense of $1.6 million for the year ended December 31, 2021, and $0.3 million for the year ended December 31, 2020.