Goodwill and Purchased Intangible Assets - (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

The changes in the carrying amount of goodwill are as follows:

Balance at December 31, 2017, net of accumulated impairment charge of $192,872	$	22,495
Goodwill acquired during the period		—
Balance at December 31, 2018		22,495
Goodwill acquired during the period (Note 3)		284,653
Balance at December 31, 2019	$	307,148

Schedule of Purchased Intangible Assets

Purchased intangible assets as of December 31, 2019 and 2018 are as follows:

	Gross Carrying Amount		Accumulated Amortization		Net
December 31, 2019
Finite-lived intangible assets:
Developed technology	$	326,726	$	67,861	$	258,865
Customer and distributor relationships		69,261		11,078		58,183
Trademarks and trade names		12,461		4,156		8,305
Total finite-lived intangible assets		408,448		83,095		325,353
In-process research and development		46,600		—		46,600
Total identifiable intangible assets	$	455,048	$	83,095	$	371,953
December 31, 2018
Finite-lived intangible assets:
Developed technology	$	66,177	$	59,692	$	6,485
Customer and distributor relationships		9,560		9,082		478
Trademarks and trade names		4,361		3,876		485
Total identifiable intangible assets	$	80,098	$	72,650	$	7,448