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Identified Intangible Assets and Liabilities
 12 Months Ended
Dec. 31, 2022
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Identified Intangible Assets and Liabilities Identified Intangible Assets and Liabilities
The following summarizes our identified intangible assets (primarily above-market leases) and liabilities (primarily below-market leases).
(Amounts in thousands)Balance as of December 31,
 20222021
Identified intangible assets:  
Gross amount$237,777 $252,081 
Accumulated amortization(98,139)(97,186)
Total, net$139,638 $154,895 
Identified intangible liabilities (included in deferred revenue):
Gross amount$244,396 $256,065 
Accumulated amortization(208,592)(212,245)
Total, net $35,804 $43,820 
Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental revenues of $5,178,000, $9,249,000 and $16,878,000 for the years ended December 31, 2022, 2021 and 2020, respectively. Estimated annual amortization for each of the five succeeding years commencing January 1, 2023 is below:
(Amounts in thousands) 
2023$5,471 
20242,352 
2025941 
2026299 
2027(148)
Amortization of all other identified intangible assets (a component of depreciation and amortization expense) was $10,516,000, $7,330,000 and $6,507,000 for the years ended December 31, 2022, 2021 and 2020, respectively. Estimated annual amortization for each of the five succeeding years commencing January 1, 2023 is below:
(Amounts in thousands) 
2023$7,948 
20247,128 
20256,077 
20265,884 
20275,449