The Company is the lessor for its residential and non-residential leases and these leases will continue to be accounted for as operating leases under the lease standard.

For both the quarters ended March 31, 2021 and 2020, approximately 97% of the Company’s total lease revenue is generated from residential apartment leases that are generally twelve months or less in length. The residential apartment leases may include lease income related to such items as utility recoveries, parking, storage and pet rent that the Company treats as a single lease component because the amenities cannot be leased on their own and the timing and pattern of revenue recognition are the same. The collection of lease payments at lease commencement is probable and therefore the Company subsequently recognizes lease income over the lease term on a straight-line basis. Residential leases are renewable upon consent of both parties on an annual or monthly basis.

For both the quarters ended March 31, 2021 and 2020, approximately 3% of the Company’s total lease revenue is generated by non-residential leases that are generally for terms ranging between five to ten years. The non-residential leases generally consist of ground floor retail spaces and master-leased parking garages that serve as additional amenities for our residents. The non-residential leases may include lease income related to such items as utility recoveries, parking rent and storage rent that the Company treats as a single lease component because the amenities cannot be leased on their own and the timing and pattern of revenue recognition are the same. The collection of lease payments at lease commencement is probable and therefore the Company subsequently recognizes lease income over the lease term on a straight-line basis. Non-residential leases are renewable with market-based renewal options.

The following table presents the lease income types relating to lease payments for residential and non-residential leases along with the total other rental income for the quarters ended March 31, 2021 and 2020 (amounts in thousands):

	Quarter Ended March 31, 2021								Quarter Ended March 31, 2020
Income Type	Residential Leases			Non-Residential Leases		Total			Residential Leases			Non-Residential Leases			Total
Residential and non-residential rent	$	539,655		$	15,839	$	555,494		$	612,480		$	18,094		$	630,574
Utility recoveries (RUBS income) (1)		17,954			178		18,132			17,418			228			17,646
Parking rent		9,734			267		10,001			9,833			97			9,930
Other lease revenue (2)		(10,262	)		609		(9,653	)		(213	)		(280	)		(493	)
Total lease revenue	$	557,081		$	16,893		573,974		$	639,518		$	18,139			657,657
Parking revenue							5,433									6,783
Other revenue							18,195									17,865
Total other rental income (3)							23,628									24,648
Rental income						$	597,602								$	682,305

The economic impact of the pandemic on a subset of our residents and tenants has led to elevated levels of bad debt. We continue to work with our residents and tenants on payment plans and collections and our bad debt allowance policies remain consistent.

The following table presents residential and non-residential accounts receivable and straight-line receivable balances for the Company’s properties as of March 31, 2021 and December 31, 2020 (amounts in thousands):

	Residential							Non-Residential
Balance Sheet (Other assets):	March 31, 2021				December 31, 2020			March 31, 2021			December 31, 2020
Resident/tenant accounts receivable balances	$	37,248			$	30,856		$	6,847		$	7,598
Allowance for doubtful accounts		(31,799	)			(24,021	)		(5,724	)		(6,527	)
Net receivable balances	$	5,449		(1)	$	6,835		$	1,123		$	1,071

Straight-line receivable balances	$	25,360			$	19,992		$	13,409		$	13,413

The following table presents residential bad debt for the Company’s properties for the quarters ended March 31, 2021 and 2020 (amounts in thousands):