Accounts Receivable, Net - Aging Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, net
0-60 Days	$ 120,930	$ 103,442
61-120 Days	28,394	24,308
121-180 Days	13,835	11,053
Over 180 Days	31,415	39,001
Gross charges before estimates for implicit price concessions	194,574	177,804
Less estimates for implicit price concessions	(40,507)	(46,385)
Accounts receivable, before allowance	154,067	131,419
Allowance for doubtful accounts	(2,009)	(2,823)	$ (2,641)	$ (2,272)
Accounts receivable, net	152,058	128,596
Patient Care
Accounts Receivable, net
Gross charges before estimates for implicit price concessions	173,115	156,504
Allowance for doubtful accounts	0	0
Accounts receivable, net	132,608	110,119
Patient Care | Non-Medicare
Accounts Receivable, net
0-60 Days	71,275	61,779
61-120 Days	17,223	14,541
121-180 Days	9,011	7,297
Over 180 Days	16,578	16,647
Gross charges before estimates for implicit price concessions	114,087	100,264
Patient Care | Commercial Insurance / Managed Care (excluding Medicare and Medicaid Managed Care)
Accounts Receivable, net
0-60 Days	50,397	43,069
61-120 Days	12,559	10,743
121-180 Days	6,512	5,335
Over 180 Days	11,869	12,316
Gross charges before estimates for implicit price concessions	81,337	71,463
Patient Care | Private Pay
Accounts Receivable, net
0-60 Days	938	850
61-120 Days	392	401
121-180 Days	284	309
Over 180 Days	121	281
Gross charges before estimates for implicit price concessions	1,735	1,841
Patient Care | Medicaid
Accounts Receivable, net
0-60 Days	15,595	13,569
61-120 Days	3,404	2,705
121-180 Days	1,698	1,390
Over 180 Days	4,135	3,771
Gross charges before estimates for implicit price concessions	24,832	21,435
Patient Care | Veterans Administration
Accounts Receivable, net
0-60 Days	4,345	4,291
61-120 Days	868	692
121-180 Days	517	263
Over 180 Days	453	279
Gross charges before estimates for implicit price concessions	6,183	5,525
Patient Care | Medicare
Accounts Receivable, net
0-60 Days	35,354	27,572
61-120 Days	6,100	5,169
121-180 Days	3,923	2,915
Over 180 Days	13,651	20,585
Gross charges before estimates for implicit price concessions	59,028	56,241
Products & Services
Accounts Receivable, net
Gross charges before estimates for implicit price concessions	21,459	21,300
Allowance for doubtful accounts	(2,009)	(2,823)
Accounts receivable, net	19,450	18,477
Products & Services | Trade accounts receivable
Accounts Receivable, net
0-60 Days	14,301	14,091
61-120 Days	5,071	4,598
121-180 Days	901	841
Over 180 Days	1,186	1,769
Gross charges before estimates for implicit price concessions	$ 21,459	$ 21,299