Acquisitions, Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2018

Acquisitions Intangible Assets And Goodwill [Abstract]

Schedule of Intangible Assets, net

As of December 31, 2018 and 2017, capitalized internal-use software consisted of the following:

(in thousands)	December 31, 2018			December 31, 2017
Gross capitalized internal-use software	$	109,133		$	95,607
Less: Accumulated amortization		(75,853	)		(54,114	)
Capitalized internal use software, net	$	33,280		$	41,493

As of December 31, 2018 and 2017, intangible assets, net consisted of the following:

	December 31, 2018							December 31, 2017
(in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	47,696	$	(42,410	)	$	5,286	$	47,696	$	(40,696	)	$	7,000
Trade name		6,072		(5,796	)		276		6,072		(5,192	)		880
Technology		22,007		(18,245	)		3,762		22,007		(16,293	)		5,714
Acquisition intangible assets, net	$	75,775	$	(66,451	)	$	9,324	$	75,775	$	(62,181	)	$	13,594

Summary of Future Amortization Expense

As of December 31, 2018, future amortization expense by year is expected to be as follows:

(in thousands)	Capitalized internal-use software, net		Acquisition intangible assets, net
2019	$	12,662	$	3,839
2020		5,925		2,952
2021		1,092		1,705
2022		—		828
Total amortization expense	$	19,679	$	9,324

Schedule of Carrying Amount of Goodwill, Net

The changes in the carrying amount of goodwill, net were as follows (in thousands):

Balance as of December 31, 2015	$	349,043
Goodwill derecognition		(12,182	)
Balance as of December 31, 2016	$	336,861
Balance as of December 31, 2017	$	336,861
Balance as of December 31, 2018	$	336,861