Acquisition-related Intangible Assets, Net

9 Months Ended

Oct. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Acquisition-related intangible assets, net consisted of the following (in thousands):



	October 31, 2018			January 31, 2018
Developed technology	$	186,800		$	69,700
Customer relationships	189,000			1,000
Trade name	12,000			—
Backlog	11,000			—
	398,800			70,700
Less accumulated amortization	(66,217		)	(36,466		)
Acquisition-related intangible assets, net	$	332,583		$	34,234

Amortization expense related to acquisition-related intangible assets was $20 million and $4 million for the three months ended October 31, 2018 and 2017, respectively, and $30 million and $14 million for the nine months ended October 31, 2018 and 2017, respectively.

As of October 31, 2018, our future estimated amortization expense related to acquisition-related intangible assets is as follows (in thousands):



Fiscal Period:
2019	$	19,343
2020	68,856
2021	48,142
2022	43,733
2023	41,009
Thereafter	111,500
Total	$	332,583