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Identified Intangible Assets and Liabilities
 12 Months Ended
Dec. 31, 2023
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Identified Intangible Assets and Liabilities Identified Intangible Assets and Liabilities
The following summarizes our identified intangible assets (primarily in-place and above-market leases) and liabilities (primarily below-market leases).
(Amounts in thousands)Balance as of December 31,
 20232022
Identified intangible assets:  
Gross amount$225,671 $237,777 
Accumulated amortization(98,589)(98,139)
Total, net$127,082 $139,638 
Identified intangible liabilities (included in deferred revenue):
Gross amount$206,771 $244,396 
Accumulated amortization(178,282)(208,592)
Total, net $28,489 $35,804 
Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental revenues of $5,268,000, $5,178,000 and $9,249,000 for the years ended December 31, 2023, 2022 and 2021, respectively. Estimated annual amortization for each of the five succeeding years commencing January 1, 2024 is below:
(Amounts in thousands) 
2024$2,451 
2025964 
2026321 
2027(148)
2028(47)
Amortization of all other identified intangible assets (a component of depreciation and amortization expense) was $8,342,000, $10,516,000 and $7,330,000 for the years ended December 31, 2023, 2022 and 2021, respectively. Estimated annual amortization for each of the five succeeding years commencing January 1, 2024 is below:
(Amounts in thousands) 
2024$6,843 
20255,810 
20265,615 
20275,308 
20284,173