PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 211,820	$ 151,189
Less accumulated depreciation	78,622	58,047
Property and equipment, net	133,198	93,142
Depreciation expense	31,808	21,483	$ 18,268
Gain on business casualty loss	626	(3,549)	0
Infusion pumps
Property, Plant and Equipment [Line Items]
Property and equipment, gross	30,416	20,339
Equipment, furniture, and other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	51,454	34,433
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	80,916	61,302
Computer software, purchased and internally developed
Property, Plant and Equipment [Line Items]
Property and equipment, gross	34,884	29,668
Assets under development
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,150	5,447
Depreciation expense in cost of revenue
Property, Plant and Equipment [Line Items]
Depreciation expense	4,179	2,993	3,400
Depreciation expense in operating expenses
Property, Plant and Equipment [Line Items]
Depreciation expense	27,629	18,490	$ 14,868
Hurricane
Property, Plant and Equipment [Line Items]
Gain (Loss) on disposition of property and equipment		600
Insurance proceeds		$ 800
Property and Equipment | Hurricane
Property, Plant and Equipment [Line Items]
Insurance proceeds	600
Gain on business casualty loss	$ 600