Goodwill and Acquired Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2014

Components of Acquired Intangible Assets

The components of acquired intangible assets as of March 31, 2014 and December 31, 2013 were as follows:

	March 31, 2014
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
	(in thousands)
Developed technology	$	5,143	$	(1,106	)	$	4,037
Customer and vendor relationships, databases		191,979		(20,777	)		171,202
Total amortizable intangible assets		197,122		(21,883	)		175,239
Indefinite-lived trademarks		89,676		—			89,676
Total acquired intangible assets	$	286,798	$	(21,883	)	$	264,915

	December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
	(in thousands)
Developed technology	$	5,143	$	(677	)	$	4,466
Customer and vendor relationships, databases		191,979		(17,680	)		174,299
Total amortizable intangible assets		197,122		(18,357	)		178,765
Indefinite-lived trademarks		89,676		—			89,676
Total acquired intangible assets	$	286,798	$	(18,357	)	$	268,441

Estimated Future Amortization of Acquired Intangible Assets

Estimated future amortization expense of acquired intangible assets as of March 31, 2014 was as follows:

	(in thousands)
The remainder of 2014	$	10,576
2015		14,102
2016		13,344
2017		12,068
2018		12,068
Thereafter		113,081
Total	$	175,239