Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Goodwill allocated
Goodwill, Net as of beginning of the year	$ 277,223
Goodwill, Net as of end of the year	322,699	$ 277,223
Measurement period adjustments related to acquisitions	200
2021 Acquisitions
Goodwill allocated
Additions from acquisitions	45,220
Measurement period adjustments related to acquisitions	(400)
2020 Acquisitions
Goodwill allocated
Additions from acquisitions		44,765
Measurement period adjustments related to acquisitions	700
Patient Care
Goodwill allocated
Goodwill, Gross as of beginning of the period	705,891	660,912
Accumulated Impairment as of beginning of the period	(428,668)	(428,668)
Goodwill, Net as of beginning of the year	277,223	232,244
Additions from acquisitions	45,220	45,144
Measurement period adjustments	256	(165)
Goodwill, Gross as of end of the period	751,367	705,891
Accumulated Impairment as of end of the period	(428,668)	(428,668)
Goodwill, Net as of end of the year	$ 322,699	$ 277,223