CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Comprehensive income, net of tax:
Net income		$ (3,173)	$ 74,295	$ 57,726
Other comprehensive income (loss)
Interest rate swaps	[1]	(23,070)	(21,184)	(63)
Capitalized swap interest (expense) income	[2]	0	(73)	30
Pension adjustment	[3]	(84)	11	759
Adoption of ASU 2018-02	[4]	0	0	(1,148)
Adoption of ASU 2017-12	[5]	0	0	(739)
Deconsolidation of 110 North Wacker	[6]	12,934	0	0
Share of investee's other comprehensive income	[7]	1,002	0	0
Other comprehensive income (loss)		(9,218)	(21,246)	(1,161)
Comprehensive income (loss)		(12,391)	53,049	56,565
Comprehensive (income) loss attributable to noncontrolling interests		(22,981)	(339)	(714)
Comprehensive income (loss) attributable to common stockholders		$ (35,372)	$ 52,710	$ 55,851

[1] Amounts are shown net of deferred tax benefit of $5.3 million for the year ended December 31, 2020, $6.2 million for the year ended December 31, 2019, and $0.3 million for the year ended December 31, 2018.

[2] The deferred tax impact was not meaningful for the years ended December 31, 2020, 2019 and 2018.

[3] The deferred tax impact is not meaningful for the years ended December 31, 2020 and 2019. Amount is net of deferred tax expense of $0.5 million for the year ended December 31, 2018.

[4] The Company adopted Accounting Standards Update (ASU) 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, as of January 1, 2018.

[5] The Company adopted ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, as of January 1, 2018.

[6] This amount represents the derecognition of Other comprehensive income (loss) related to interest rate collars on the 110 North Wacker debt, shown net of deferred tax expense of $1.0 million.

[7] The amount for 2020 is shown net of deferred tax expense of $0.3 million.