STOCKHOLDERS' EQUITY (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Feb. 03, 2020	Aug. 06, 2019 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) day $ / shares shares	Dec. 31, 2018 USD ($)	Dec. 31, 2016 shares	Aug. 05, 2019 shares	Jun. 29, 2017 $ / shares	Mar. 09, 2015 $ / shares
Class of Warrant or Right [Line Items]
Stock conversion ratio	0.25
Payments to extinguish debt | $			$ 9,250	$ 2,075	$ 5,150
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001	$ 0.0001
Shares surrendered to satisfy tax withholding (in shares)				290,117
Treasury stock held (in shares)			383,722	383,722
Preferred stock outstanding (in shares)			0	0
Credit Agreements, Entered Into 2019 | Notes Payable
Class of Warrant or Right [Line Items]
Payments to extinguish debt | $			$ 174,000
HC Group Holdings I, LLC
Class of Warrant or Right [Line Items]
Percentage of outstanding common stock			0.636
Common Stock | Public Offering
Class of Warrant or Right [Line Items]
Additional shares issued (in shares)			20,700,000
Shares issued, price per share (in dollars per share) | $ / shares			$ 12.50
Proceeds from sale of equity | $			$ 118,900
Common Stock | Public Offering | Option Care Health, Inc
Class of Warrant or Right [Line Items]
Additional shares issued (in shares)			10,000,000
Common Stock | Public Offering | HC Group Holdings I, LLC
Class of Warrant or Right [Line Items]
Additional shares issued (in shares)			10,700,000
Common Stock | Secondary Offering
Class of Warrant or Right [Line Items]
Additional shares issued (in shares)			10,600,000
Common Stock | 2017 Warrants
Class of Warrant or Right [Line Items]
Number of shares purchasable through warrants (in shares)		2,100,000
Term of warrants								10 years
Exercise price of warrants (in dollars per share) | $ / shares								$ 8.00
Fair value of warrants | $		$ 14,100
Shares purchased from exercise of warrants (in shares)			0.0	700,000
Class of warrant or right, outstanding (in shares)			1,400,000	1,400,000
Common Stock | 2015 Warrants
Class of Warrant or Right [Line Items]
Number of shares purchasable through warrants (in shares)							900,000
Term of warrants									10 years
Fair value of warrants | $		$ 4,600
Minimum | Common Stock | 2015 Warrants
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares									$ 20.68
Maximum | Common Stock | 2015 Warrants
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares									$ 25.80
OptionCare Enterprises, Inc.
Class of Warrant or Right [Line Items]
Additional shares issued (in shares)		7,048,357	7,048,357
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001
Restricted Stock Units (RSUs) | Home Solutions
Class of Warrant or Right [Line Items]
Shares issued pursuant to acquisition (in shares)						1,800,000
Restricted Stock And Stock Options
Class of Warrant or Right [Line Items]
Value of shares surrendered to satisfy tax withholding obligations | $				$ 2,500
Restricted Stock And Stock Options | Treasury Stock
Class of Warrant or Right [Line Items]
Value of shares surrendered to satisfy tax withholding obligations | $			$ 2,400	$ 2,400
Tranche One | Restricted Stock Units (RSUs) | Home Solutions
Class of Warrant or Right [Line Items]
Shares issued pursuant to acquisition (in shares)				800,000
Stock price threshold (in dollars per share) | $ / shares				$ 16.00
Consecutive trading days threshold | day				20
Tranche Two | Restricted Stock Units (RSUs) | Home Solutions
Class of Warrant or Right [Line Items]
Shares issued pursuant to acquisition (in shares)				1,000,000.0
Stock price threshold (in dollars per share) | $ / shares				$ 20.00
Consecutive trading days threshold | day				20