GOODWILL AND OTHER INTANGIBLE ASSETS

9 Months Ended

Sep. 30, 2018

GOODWILL AND OTHER INTANGIBLE ASSETS

6. GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill

The change in the carrying amount of goodwill was as follows:

(in thousands)	Nine Months Ended              September 30,
	2018
Balance as of January 1,	$	72,952
Currency translation adjustments		(55)
Balance as of September 30,	$	72,897

Intangibles

Intangible assets are recorded at cost and amortized using the straight-line method over their estimated useful lives as follows:

			September 30, 2018
(in thousands)	Useful Lives		Cost		Accumulated Amortization		Net Book Value(1)
Client-related intangibles		4-10 years	$	63,136	$	(49,633)	$	13,503
Technology		3-10 years		58,942		(49,067)		9,875
Other		1-5 years		5,361		(5,361)		—
			$	127,439	$	(104,061)	$	23,378

  ⁽¹⁾ Included in other long-term assets.

			December 31, 2017
(in thousands)	Useful Lives		Cost		Accumulated Amortization		Net Book Value(1)
Client-related intangibles		4-10 years	$	63,164	$	(44,835)	$	18,329
Technology		3-10 years		58,942		(45,372)		13,570
Other		1-5 years		5,361		(5,361)		—
			$	127,467	$	(95,568)	$	31,899

  ⁽¹⁾ Included in other long-term assets.

Amortization of intangible assets was as follows:

	Three Months Ended              September 30,				Nine Months Ended              September 30,
(in thousands)	2018		2017		2018		2017
Cost of revenue	$	1,232	$	1,232	$	3,695	$	3,871
Selling and marketing		1,603		1,873		4,813		5,608
	$	2,835	$	3,105	$	8,508	$	9,479