ACCOUNTS RECEIVABLE, NET - (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts Receivable, net
Accounts receivable, before allowances	$ 196,135	$ 216,644
Allowances for estimated implicit price concessions arising from:
Payor disallowances	(52,267)	(56,233)
Patient non-payments	(7,716)
Accounts receivable, gross	136,152	160,411
Allowance for doubtful accounts	(3,706)	(14,065)
Accounts receivable, net	132,446	146,346
Patient Care
Accounts Receivable, net
Accounts receivable, before allowances	170,030	193,150
Allowances for estimated implicit price concessions arising from:
Payor disallowances	(52,267)	(56,233)
Patient non-payments	(7,716)
Accounts receivable, gross	110,047	136,917
Allowance for doubtful accounts		(9,894)
Accounts receivable, net	110,047	127,023
Products & Services
Accounts Receivable, net
Accounts receivable, before allowances	26,105	23,494
Allowances for estimated implicit price concessions arising from:
Accounts receivable, gross	26,105	23,494
Allowance for doubtful accounts	(3,706)	(4,171)
Accounts receivable, net	$ 22,399	$ 19,323