Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

The changes in the carrying amount of goodwill for the year to date period ended June 30, 2018 are as follows (in thousands):


	CPE			N & C			Enterprise			Total
Goodwill		1,386,680			1,003,654			318,034			2,708,368
Accumulated impairment losses		—			(429,856	)		—			(429,856	)

Balance as of December 31, 2017	$	1,386,680		$	573,798		$	318,034		$	2,278,512

Changes in year 2018:
Goodwill acquired, net		—			—			(9,792	)		(9,792	)
Impairment		—			(3,400	)		—			(3,400	)
Other		(6,143	)		—			—			(6,143	)

Balance as of June 30, 2018	$	1,380,537		$	570,398		$	308,242		$	2,259,177
Goodwill		1,380,537			1,003,654			308,242			2,692,433
Accumulated impairment losses		—			(433,256	)		—			(433,256	)

Balance as of June 30, 2018	$	1,380,537		$	570,398		$	308,242		$	2,259,177

Gross Carrying Amount and Accumulated Amortization of Acquired Intangible Assets

The gross carrying amount and accumulated amortization of the Company’s acquired intangible assets as of June 30, 2018 and December 31, 2017 are as follows (in thousands):


	June 30, 2018						December 31, 2017
	Gross Amount		Accumulated Amortization		Net Book Value		Gross Amount		Accumulated Amortization		Net Book Value
Definite-lived intangible assets:
Customer relationships	$	1,761,898	$	866,141	$	895,757	$	1,672,470	$	780,655	$	891,815
Developed technology, patents & licenses		1,479,200		873,420		605,780		1,521,893		771,200		750,693
Trademarks, trade and domain names		75,672		53,016		22,656		87,472		41,885		45,587
Backlog		15,300		14,500		800		35,000		5,833		29,167

Sub-total	$	3,332,070	$	1,807,077	$	1,524,993	$	3,316,835	$	1,599,573	$	1,717,262

Indefinite-lived intangible assets:
Tradenames		55,400		—		55,400		—		—		—
In-process research and development		—		—		—		54,100		—		54,100

Sub-total		55,400		—		55,400		54,100		—		54,100

Total	$	3,387,470	$	1,807,077	$	1,580,393	$	3,370,935	$	1,599,573	$	1,771,362

Schedule of Amortization of Acquired Intangible Assets

The following table presents the amortization of acquired intangible assets (in thousands):


	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Cost of sales	$	889	$	711	$	1,779	$	1,422
Selling, general and administrative expenses		986		949		1,983		1,899
Amortization of acquired intangible assets ⁽¹⁾		90,485		91,012		205,193		184,657

Total	$	92,360	$	92,672	$	208,955	$	187,978

⁽¹⁾	Reflects amortization expense for the intangible assets acquired through business combinations.

Estimated Total Amortization Expense for Finite-Lived Intangibles for Next Five Fiscal Years

The estimated total amortization expense for finite-lived intangibles for each of the next five fiscal years is as follows (in thousands):


2018 (for the remaining six months)	$	180,112
2019		333,202
2020		321,357
2021		186,571
2022		149,312
Thereafter		354,439