INTANGIBLE ASSETS

Intangible assets consist of the following (in thousands, except amortization period data):



	September 30, 2015			December 31, 2014			Weighted- Average Amortization Period (in years)
Capitalized product development cost	$	2,243		$	2,140		4
Accumulated amortization	(2,163		)	(2,140		)
Capitalized product development cost, net	80			—

Building photography	17,649			14,943			4
Accumulated amortization	(15,217		)	(12,665		)
Building photography, net	2,432			2,278

Acquired database technology	81,898			88,739			5
Accumulated amortization	(63,226		)	(60,498		)
Acquired database technology, net	18,672			28,241

Acquired customer base	220,760			199,826			10
Accumulated amortization	(123,409		)	(102,443		)
Acquired customer base, net	97,351			97,383

Acquired trade names and other intangible assets ⁽¹⁾	154,266			128,171			12
Accumulated amortization	(21,988		)	(14,451		)
Acquired trade names and other intangible assets, net	132,278			113,720

Intangible assets, net	$	250,813		$	241,622

⁽¹⁾ The weighted-average amortization period for acquired trade names excludes $48.7 million for acquired trade names recorded in connection with the LoopNet acquisition on April 30, 2012, which amount is not amortized, but is subject to annual impairment tests.

In February 2015, as a result of the Company's product development efforts, it launched a new Apartments.com website with a cleaner look, information about actual rental availabilities, rents and other fees, and better search functionality. In conjunction with the launch, the Company ceased using the database technology acquired in the acquisition of Apartments.com. The Company evaluated the acquired database technology for impairment during the first quarter of 2015 and determined that the carrying value of the acquired database technology was impaired as the Company had ceased using the asset. The Company recorded an impairment charge of approximately $1.4 million in cost of revenues in the condensed consolidated statements of operations within the Company's North America operating segment for the three months ended March 31, 2015.


7.	INTANGIBLE ASSETS — (CONTINUED)

In June 2015, following the June 1, 2015 acquisition of Apartment Finder, the Company decided to cease providing certain Apartment Finder services. Additionally, in June 2015, the Company decided to cease development work related to a development project within Apartment Finder. The Company evaluated the acquired customer base and acquired database technology for impairment during the second quarter of 2015 and based on that evaluation, determined that the customer base and database technology assets associated with the ceased services and development work were impaired as they were not expected to provide any economic benefit to the Company. The Company recorded an impairment charge of approximately $1.4 million, most of which was recorded in general and administrative expenses in the condensed consolidated statements of operations within the Company's North America operating segment for the three months ended June 30, 2015.