GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

The change in the carrying amount of goodwill was:



(in thousands)	Nine Months Ended September 30, 2019
Balance as of January 1,	$	72,858
Acquisition ⁽¹⁾	6,179
Currency translation adjustments	(175		)
Balance as of September 30,	$	78,862

⁽¹⁾ In May 2019, the Company acquired In the Chat Communications Inc., a privately-held software provider of digital customer service software, for $10.9 million, net of cash acquired. The Company also expects to issue up to approximately 15 thousand shares in retention-based bonus payments to a key employee upon the achievement of specified retention milestones. The principal assets and liabilities acquired as part of the business combination were additional goodwill and technology intangible assets of $6.2 million and $5.1 million.

Schedule of Amortizable Intangible Assets

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



		September 30, 2019
(in thousands)	Useful Lives	Cost		Accumulated Amortization			Net Book Value ⁽¹⁾
Client-related	4-10 years	$	63,089	$	(53,960	)	$	9,129
Technology	2-10 years	64,843		(53,252		)	11,591
Other	1 - 5 years	5,361		(5,361		)	—
		$	133,293	$	(112,573	)	$	20,720

⁽¹⁾Included in other long-term assets.



		December 31, 2018
(in thousands)	Useful Lives	Cost		Accumulated Amortization			Net Book Value ⁽¹⁾
Client-related	4-10 years	$	63,115	$	(51,224	)	$	11,891
Technology	2-10 years	59,742		(50,398		)	9,344
Other	1 - 5 years	5,361		(5,361		)	—
		$	128,218	$	(106,983	)	$	21,235

⁽¹⁾Included in other long-term assets.

Amortization of Intangible Assets

Amortization of intangible assets was:



(in thousands)	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2019		2018		2019		2018
Cost of revenue	$	647	$	1,232	$	2,854	$	3,695
Selling and marketing	370		1,603		2,754		4,813
	$	1,017	$	2,835	$	5,608	$	8,508