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INTANGIBLES
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangibles
6. Intangibles

The following table summarizes the Company’s intangible assets and liabilities:
 As of December 31, 2020As of December 31, 2019
Gross Asset (Liability)Accumulated (Amortization)/ AccretionNet Carrying AmountGross Asset (Liability)Accumulated (Amortization)/ AccretionNet Carrying Amount
 
thousands
Intangible Assets:      
Indefinite lived intangibles$25,028 $— $25,028 $25,028 $— $25,028 
Goodwill1,307 — 1,307 1,307 — 1,307 
Other intangibles9,251 (2,991)6,260 10,278 (3,338)6,940 
Tenant leases:
In-place value63,584 (14,423)49,161 66,606 (12,135)54,471 
Above-market1,985 (1,670)315 2,247 (1,691)556 
Below-market(4,839)3,198 (1,641)(7,008)4,912 (2,096)
Total indefinite lived intangibles$26,335 $26,335 
Total amortizing intangibles$54,095 $59,871 

The tenant in-place, above-market and below-market lease intangible assets and the below-market ground lease intangible assets resulted from real estate acquisitions. The in‑place value and above-market value of tenant leases are included in Prepaid expenses and other assets, net and are amortized over periods that approximate the related lease terms. The below‑market tenant leases are included in Accounts payable and accrued expenses and are amortized over the remaining non‑cancelable terms of the respective leases. See Note 5 - Other Assets and Liabilities for additional information regarding Prepaid expenses and other assets, net and Accounts payable and accrued expenses.

Net amortization and accretion expense for these intangible assets and liabilities was $5.8 million in 2020, $2.1 million in 2019 and $6.0 million in 2018.

Future net amortization and accretion expense is estimated as shown below:
thousands2021202220232024Thereafter
Net amortization and accretion expense$5,287 $4,901 $4,481 $4,485 $34,941