Intangible assets subject to amortization that are not fully amortized are as follows (in thousands):


	Weighted average useful life	As of December 31, 2022						As of December 31, 2021
		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	4.85	$	10,400	$	(347)	$	10,053	$	—	$	—	$	—
Reacquired rights	6.85	17,618		(419)		17,199		—		—		—
Backlog	1.85	6,700		(558)		6,142		—		—		—
Other	1.27	5,717		(3,572)		2,145		5,717		(1,881)		3,836
Total intangible assets		$	40,436	$	(4,897)	$	35,539	$	5,717	$	(1,881)	$	3,836

Amortization expense of intangible assets was not material for the years ended December 31, 2022 and 2021.

As of December 31, 2022, expected amortization expense for the unamortized finite-lived intangible assets for the next five years and thereafter is as follows (in thousands):


Year ended December 31,	Amount
2023	$	9,637
2024	7,844
2025	4,597
2026	4,597
2027	4,250
Thereafter	4,614
Total	$	35,539

Changes in the carrying amount of goodwill, which is reported in the commercial segment, for the year ended December 31, 2022 are as follows (in thousands):


	Amount
Goodwill at December 31, 2021	$	1,869
Acquisitions	36,069
Goodwill at December 31, 2022	$	37,938