GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2017

Changes in Carrying Amount of Goodwill

The following table presents the changes in the carrying amount of goodwill:

(in thousands)	2017
Balance as of January 1,	$	73,164
Purchase price adjustments to goodwill		(354	)
Currency translation adjustments		18
Balance as of March 31,	$	72,828

Schedule of Amortizable Intangible Assets

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

(in thousands)	Range of Useful Lives	Cost		Accumulated Amortization			Net Book Value
As of March 31, 2017
Customer related intangibles	4-10 years	$	63,100	$	(39,441	)	$	23,659
Technology	3-10 years		58,942		(41,603	)		17,339
Other intangibles	3 years		5,361		(5,361	)		—
Total		$	127,403	$	(86,405	)	$	40,998
As of December 31, 2016
Customer related intangibles	4-10 years	$	63,091	$	(37,573	)	$	25,518
Technology	3-10 years		58,942		(40,269	)		18,673
Other intangibles	3 years		5,361		(5,361	)		—
Total		$	127,394	$	(83,203	)	$	44,191

Amortization Expense of Acquired Intangibles

Amortization expense of acquired intangibles is reflected in the Company’s unaudited condensed consolidated statements of operations as follows:

	Three Months Ended March 31,
(in thousands)	2017		2016
Cost of revenue	$	1,334	$	1,346
Selling and marketing		1,866		1,530
General and administrative		—		89
Total amortization expense	$	3,200	$	2,965

Estimated Future Amortization Expense

Amortization of intangibles is estimated to be recorded over their remaining useful lives as follows:

(in thousands) as of March 31, 2017	Future estimated amortization expense
Remainder of 2017	$	9,129
2018		11,337
2019		5,545
2020		2,649
2021		2,626
2022 and thereafter		9,712
	$	40,998