As of both December 31, 2021 and 2020, goodwill totaled $51.9 million. We have selected June 30 as our annual goodwill impairment testing date. We have elected to perform a qualitative analysis of the fair value of our goodwill and determined there was no impairment as of either June 30, 2021 or 2020. As of December 31, 2021 and 2020, there were no indicators of impairment.

In connection with our marketing initiatives, we have purchased the naming rights to the downtown Oklahoma City arena that is home to the Oklahoma City Thunder National Basketball Association franchise. Under the terms of the naming rights agreement, we have committed to make payments escalating annually from $4.0 million in 2021 to $6.1 million in 2035. We also made a $1.5 million one-time payment in July 2021 to cover sponsorship rights leading up to the 2021-2022 season. Upon the conclusion of the initial term, the agreement may be extended upon the mutual agreement of both parties for an additional five-year period. The cost of the naming rights has been recorded as an intangible asset with an offsetting liability as of the date of the contract. The intangible asset is being amortized over the life of the agreement on a straight line basis that commenced in June 2021. The difference between the present value of the offsetting liability and actual cash payments is being relieved through sales and marketing expense using the effective interest method over the life of the agreement.

All of our intangible assets other than goodwill are considered to have definite lives and, as such, are subject to amortization. The following table presents the components of intangible assets within our consolidated balance sheets:

	December 31, 2021
	Weighted Average Remaining				Accumulated
	Useful Life		Gross		Amortization			Net
	(Years)
Intangibles:
Naming rights		14.8	$	60,199	$	(2,278	)	$	57,921
Trade name		0.5		3,194		(3,087	)		107
Total			$	63,393	$	(5,365	)	$	58,028

	December 31, 2020
	Weighted Average Remaining			Accumulated
	Useful Life	Gross		Amortization			Net
	(Years)
Intangibles:
Trade name	1.5	$	3,194	$	(2,875	)	$	319
Total		$	3,194	$	(2,875	)	$	319

Amortization of intangible assets for the years ended December 31, 2021, 2020 and 2019 was $2.5 million, $0.2 million and $0.2 million, respectively. We estimate the aggregate amortization expense will be $4.0 million in 2022, and $3.9 million for each of 2023, 2024, 2025 and 2026, respectively.