We have two operating and reportable segments: (1) Software Products and (2) Professional Services. We assess goodwill for impairment at the reporting unit level. Our reporting units are determined based on the components of our operating segments that constitute a business for which discrete financial information is available and for which operating results are regularly reviewed by segment management. Our reporting units are the same as our operating segments.

As of December 31, 2022, goodwill and acquired intangible assets in the aggregate attributable to our Software Products segment was $2,751.2 million and attributable to our Professional Services segment was $11.2 million. As of September 30, 2022, goodwill and acquired intangible assets in the aggregate attributable to our Software Products segment was $2,725.2 million and attributable to our Professional Services segment was $11.2 million. Acquired intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. We evaluate goodwill for impairment in the third quarter of our fiscal year, or on an interim basis if an event occurs or circumstances change that would, more likely than not, reduce the fair value of a reporting segment below its carrying value. If a reporting unit's carrying value exceeds its fair value, we record an impairment loss equal to the difference between the carrying value of goodwill and its estimated fair value. Factors we consider important, on an overall company basis and segment basis, when applicable, that could trigger an impairment review include significant under-performance relative to historical or projected future operating results, significant changes in our use of the acquired assets or the strategy for our overall business, significant negative industry or economic trends, a significant decline in our stock price for a sustained period and a reduction of our market capitalization relative to net book value.

We completed our annual goodwill impairment review as of June 30, 2022, which consisted of a qualitative assessment of our Software Products segment and a quantitative assessment of our Professional Services segment. Our qualitative assessment for Software Products included company-specific (e.g., financial performance and long-range plans), industry, and macroeconomic factors, as well as consideration of the fair value of each reporting unit relative to its carrying value at the last valuation date (June 27, 2020). Our quantitative assessment for the Professional Services segment compared the fair value of the reporting unit to its carrying value. We estimated the fair value of the Professional Services reporting unit using a discounted cash flow valuation model. Based on our qualitative assessment for the Software Products segment and quantitative assessment for the Professional Services segment as of June 30, 2022, no impairment was required. Through December 31, 2022, there were no events or changes in circumstances that indicated that the carrying values of goodwill or acquired intangible assets may not be recoverable.

Goodwill and acquired intangible assets consisted of the following:


(in thousands)	December 31, 2022						September 30, 2022
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill (not amortized)					$	2,388,589					$	2,353,654
Intangible assets with finite lives (amortized):
Purchased software	$	508,840	$	366,149	$	142,691	$	502,859	$	355,857	$	147,002
Capitalized software		22,877		22,877		—		22,877		22,877		—
Customer lists and relationships		605,366		384,198		221,168		594,970		369,390		225,580
Trademarks and trade names		27,911		17,933		9,978		27,546		17,410		10,136
Other		3,885		3,885		—		3,766		3,766		—
Total intangible assets with finite lives	$	1,168,879	$	795,042	$	373,837	$	1,152,018	$	769,300	$	382,718
Total goodwill and acquired intangible assets					$	2,762,426					$	2,736,372

Changes in goodwill presented by reportable segments were as follows:


(in thousands)	Software Products		Professional Services		Total
Balance, October 1, 2022	$	2,344,019	$	9,635	$	2,353,654
Foreign currency translation adjustment		34,793		142		34,935
Balance, December 31, 2022	$	2,378,812	$	9,777	$	2,388,589