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Goodwill and Other Intangible Assets
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
As of each balance sheet date, other intangible assets consisted of the following:
As of December 31,
20212020
(in thousands)Weighted-average amortization periodGross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Value		Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Value
Client relationships15 years$4,178,280 $(1,531,679)$2,646,601 $4,138,460 $(1,252,892)$2,885,568 
Provider network15 years896,800 (332,812)563,988 896,800 (273,026)623,774 
Technology5 years6,350 (1,482)4,868 6,350 (211)6,139 
Trade names9 years2,670 (390)2,280 1,430 (24)1,406 
Trade namesIndefinite67,300 — 67,300 67,300 — 67,300 
Total$5,151,400 $(1,866,363)$3,285,037 $5,110,340 $(1,526,153)$3,584,187 
The estimated aggregate amortization expense for each of the five succeeding years is $340.2 million per year.
The goodwill arose from the acquisition of the Company in 2016 by Holdings, the HST acquisition in 2020 and the DHP acquisition in 2021. The carrying value of goodwill was $4,363.1 million and $4,257.3 million as of December 31, 2021 and 2020, respectively, and no impairment has been recognized to date.
Goodwill for the years ended December 31, 2021 and 2020 are as follows:
(in thousands)20212020
Beginning balance, January 1$4,257,336 $4,142,013 
Acquisitions108,435 115,323 
Measurement period adjustments(2,701)— 
Ending balance, December 31$4,363,070 $4,257,336