Deferred Revenue and Acquisition-Related Intangible Liabilities, net (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Deferred revenue and acquisition-related liabilities

Deferred revenue and acquisition-related intangible liabilities, net consisted of the following at December 31, 2020 and 2019:

	December 31,
	2020		2019
	(in thousands)
Deferred revenue related to tenant-funded tenant improvements	$	88,645	$	96,271
Other deferred revenue	26,533		19,125
Acquisition-related intangible liabilities, net (1)	13,345		24,092
Total	$	128,523	$139,488

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(1)See Note 5 “Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net” for additional information regarding our acquisition-related intangible liabilities.

Estimated amortization of deferred revenue related to tenant-funded improvements

The following is the estimated amortization of deferred revenue related to tenant-funded tenant improvements as of December 31, 2020 for the next five years and thereafter:

Year Ending	(in thousands)
2021	$	16,216
2022	15,188
2023	13,367
2024	11,325
2025	8,564
Thereafter	23,985
Total	$	88,645