	Years ended December 31,
	2019		2018		2017
Base rents	$	105,041,000	$	107,630,000	$	108,998,000
Expense recoveries		33,475,000		33,378,000		31,220,000
Percentage rent		971,000		725,000		896,000
Straight-line rents		405,000		1,142,000		864,000
Amortization of intangible lease liabilities, net		2,827,000		4,361,000		2,518,000
Total rents	$	142,719,000	$	147,236,000	$	144,496,000

In April 2018, the Company accepted a cash payment of $4.3 million in consideration for permitting a dark anchor tenant to terminate its lease prior to the contractual expiration. As a result of this termination, revenues for 2018 includes $5.4 million, consisting of (1) $3.8 million of other income (the $4.3 million cash payment reduced by $0.5 million straight-line rent receivable) and (2) $1.5 million accelerated intangible lease liability amortization. The Company recognizes lease termination income when the following conditions are met: (1) the lease termination agreement has been executed, (2) the lease termination fee is determinable, (3) all the Company’s landlord services pursuant to the terminated lease have been rendered, and (4) collectability of the lease termination fee is assured.

On January 31, 2020, the Company agreed to a cash payment in consideration for permitting a dark anchor tenant to terminate its lease prior to the contractual expiration. As a result of this termination, revenues for the three months ended March 31, 2020, will include approximately $7.1 million of other income. Further, the Company will classify this property as real estate held for sale during the first quarter of 2020 and, as a result, will record an impairment charge of approximately $7.5 million. Accordingly, future base rents associated with this tenant have not been included in the annual future rents table below.

Annual future base rents due to be received under non-cancelable operating leases in effect at December 31, 2019 are approximately as follows (excluding those base rents applicable to properties classified as real estate held for sale):

2020	$	98,931,000
2021		88,888,000
2022		77,176,000
2023		70,248,000
2024		59,957,000
Thereafter		208,157,000
	$	603,357,000

Total future minimum rents do not include expense recoveries for real estate taxes and operating costs, or percentage rents based upon tenants’ sales volume. Such additional revenue amounts aggregated approximately $34.4 million, $34.1 million and $32.1 million for 2019, 2018 and 2017, respectively. Such amounts do not include amortization of intangible lease liabilities.