Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill allocated to the Company's reportable segments

The following table summarizes the activity in goodwill of the Patient Care operating segment for the periods indicated:

	For the Nine Months Ended September 30, 2021
(in thousands)	Goodwill, Gross		Accumulated Impairment		Goodwill, Net
As of December 31, 2020	$	705,891	$	(428,668)	$	277,223
Additions from acquisitions	45,220		—		45,220
Measurement period adjustments (1)	256		—		256
As of September 30, 2021	$	751,367	$	(428,668)	$	322,699

(1) Measurement period adjustments relate to 2021 acquisitions of approximately $(0.4) million and acquisitions in prior years of approximately $0.7 million for a net increase to goodwill. These measurement period adjustments are primarily attributable to adjustments to the accounts receivables and accounts payables balances.

	For the Year Ended December 31, 2020
(in thousands)	Goodwill, Gross		Accumulated Impairment		Goodwill, Net
As of December 31, 2019	$	660,912	$	(428,668)	$	232,244
Additions from acquisitions	45,144		—		45,144
Measurement period adjustments (1)	(165)		—		(165)
As of December 31, 2020	$	705,891	$	(428,668)	$	277,223

(1) Measurement period adjustments reducing goodwill relate to acquisitions in the current and prior year of approximately $0.2 million and are primarily attributable to adjustments to the preliminary allocations of customer relationship intangibles.

Schedule of balances related to indefinite-lived intangible assets

The balances related to intangible assets as of September 30, 2021 and December 31, 2020 are as follows:

	As of September 30, 2021
(in thousands)	Gross Carrying Amount		Accumulated Amortization		Accumulated Impairment		Net Carrying Amount
Customer lists	$	22,384	$	(8,705)	$	—	$	13,679
Trade name	255		(195)		—		60
Patents and other intangibles	9,056		(6,312)		—		2,744
Definite-lived intangible assets	31,695		(15,212)		—		16,483
Indefinite-lived trade name	9,070		—		(4,953)		4,117
Total other intangible assets	$	40,765	$	(15,212)	$	(4,953)	$	20,600

	As of December 31, 2020
(in thousands)	Gross Carrying Amount		Accumulated Amortization		Accumulated Impairment		Net Carrying Amount
Customer lists	$	16,879	$	(5,845)	$	—	$	11,034
Trade name	255		(176)		—		79
Patents and other intangibles	9,011		(5,810)		—		3,201
Definite-lived intangible assets	26,145		(11,831)		—		14,314
Indefinite-lived trade name	9,070		—		(4,953)		4,117
Total other intangible assets	$	35,215	$	(11,831)	$	(4,953)	$	18,431

Schedule of estimated aggregate amortization expense for definite-lived intangible assets

Estimated aggregate amortization expense for definite-lived intangible assets for each of the next five years ended December 31, and thereafter is as follows:

(in thousands)
2021 (remainder of the year)	$	1,252
2022	4,941
2023	4,698
2024	3,207
2025	2,019
Thereafter	366
Total	$	16,483