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Goodwill and Acquired Intangible Assets
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Acquired Intangible Assets Goodwill and Acquired Intangible Assets
Acquired intangible assets that are subject to amortization consisted of the following as of December 31, 2021 and 2020 (in thousands):
 
 December 31, 2021December 31, 2020
Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount		Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount
Completed technologies$257,857 $(128,715)$129,142 $172,346 $(111,435)$60,911 
Customer-related intangible assets398,182 (216,192)181,990 358,032 (186,733)171,299 
Non-compete agreements258 (107)151 373 (77)296 
Trademarks and trade names8,039 (6,097)1,942 7,658 (5,440)2,218 
Acquired license rights490 (490)— 490 (490)— 
Total$664,826 $(351,601)$313,225 $538,899 $(304,175)$234,724 

Aggregate expense related to amortization of acquired intangible assets for the years ended December 31, 2021, 2020 and 2019 was $48.0 million, $42.0 million and $38.6 million, respectively. Based on the Company's acquired intangible assets as of December 31, 2021, aggregate expense related to amortization of acquired intangible assets is expected to be $48.1 million, $43.5 million, $38.9 million, $35.8 million and $31.0 million for the years ending December 31, 2022, 2023, 2024, 2025 and 2026, respectively.

The changes in the carrying amount of goodwill for the years ended December 31, 2021 and 2020 were as follows (in thousands):

 20212020
Beginning balance$1,674,371 $1,600,265 
Acquisition of Guardicore Ltd.479,110 — 
Acquisition of Inverse, Inc.10,741 — 
Acquisition of Asavie Technologies Limited— 70,200 
Measurement period adjustments related to acquisitions completed in prior years(267)(1,056)
Foreign currency translation(7,701)4,962 
Ending balance$2,156,254 $1,674,371