RETIREMENT AND OTHER EMPLOYEE BENEFIT PROGRAMS - Schedule of Multiemployer Defined Benefit Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Multiemployer Plans [Line Items]
Multiemployer plan, surcharge rate	5.00%
Multiemployer plan, surcharge rate, subsequent periods	10.00%
Multiemployer plans minimum contribution percentage		5.00%
Pension Plan Private Sanitation Union, Local 813 IBT
Multiemployer Plans [Line Items]
Company Contributions	$ 0.6	$ 0.6
Nurses And Local 813 IBT Retirement Plan
Multiemployer Plans [Line Items]
Company Contributions	$ 0.1	$ 0.0

Amount of contributions made to multiemployer plan by employer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration