Accounts Receivable, Net - Aging Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts Receivable, net
0-60 days	$ 118,648	$ 110,452
61-120 Days	33,578	27,745
121-180 Days	17,446	13,834
Over 180 Days	60,011	54,849
Gross charges before estimates for implicit price concessions	229,683	206,880
Less estimates for implicit price concessions	(67,683)	(60,622)
Accounts receivable, before allowances	162,000	146,258
Allowance for doubtful accounts	(2,641)	(2,272)	$ (14,065)	$ (15,521)
Accounts receivable, net	159,359	143,986
Patient Care
Accounts Receivable, net
Gross charges before estimates for implicit price concessions	202,132	182,338
Accounts receivable, net	134,449	121,716
Patient Care | Non-Medicare
Accounts Receivable, net
0-60 days	66,096	63,345
61-120 Days	18,052	15,755
121-180 Days	10,152	9,191
Over 180 Days	27,322	25,068
Gross charges before estimates for implicit price concessions	121,622	113,359
Patient Care | Commercial Insurance/ Managed Care (excluding Medicare and Medicaid Managed Care)
Accounts Receivable, net
0-60 days	46,771	44,918
61-120 Days	12,599	11,495
121-180 Days	7,050	6,467
Over 180 Days	18,120	17,172
Gross charges before estimates for implicit price concessions	84,540	80,052
Patient Care | Private Pay
Accounts Receivable, net
0-60 days	1,081	951
61-120 Days	535	437
121-180 Days	435	343
Over 180 Days	569	483
Gross charges before estimates for implicit price concessions	2,620	2,214
Patient Care | Medicaid
Accounts Receivable, net
0-60 days	13,779	12,690
61-120 Days	3,903	2,964
121-180 Days	2,314	1,855
Over 180 Days	8,068	6,629
Gross charges before estimates for implicit price concessions	28,064	24,138
Patient Care | Veterans Administration
Accounts Receivable, net
0-60 days	4,465	4,786
61-120 Days	1,015	859
121-180 Days	353	526
Over 180 Days	565	784
Gross charges before estimates for implicit price concessions	6,398	6,955
Patient Care | Medicare
Accounts Receivable, net
0-60 days	36,654	32,339
61-120 Days	8,181	5,483
121-180 Days	5,191	3,002
Over 180 Days	30,484	28,155
Gross charges before estimates for implicit price concessions	80,510	68,979
Products & Services
Accounts Receivable, net
Gross charges before estimates for implicit price concessions	27,551	24,542
Allowance for doubtful accounts	(2,641)	(2,272)
Accounts receivable, net	24,910	22,270
Products & Services | Trade accounts receivable
Accounts Receivable, net
0-60 days	15,898	14,768
61-120 Days	7,345	6,507
121-180 Days	2,103	1,641
Over 180 Days	2,205	1,626
Gross charges before estimates for implicit price concessions	$ 27,551	$ 24,542