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RETIREMENT AND OTHER EMPLOYEE BENEFIT PROGRAMS - Schedule of Multiemployer Defined Benefit Pension Plans (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Pension Plan Private Sanitation Union, Local 813 IBT [Member]    
Multiemployer Plans [Line Items]    
Plan Employer ID Number 131975659  
Plan # 001  
Pension Protection Act Zone Status [1],[2] Red Red
FIP/RP Status [3] Implemented  
Company Contributions [4] $ 0.6 $ 0.5
Expiration Date of Collective Bargaining Agreement Nov. 30, 2019  
Nurses and Local 813 IBT Retirement Plan [Member]    
Multiemployer Plans [Line Items]    
Plan Employer ID Number 133628926  
Plan # 001  
Pension Protection Act Zone Status [1],[2] Green Red
FIP/RP Status [3] NA  
Expiration Date of Collective Bargaining Agreement various dates  
[1] A multiemployer defined benefit pension plan that has been certified as endangered, seriously endangered or critical may begin to levy a statutory surcharge on contribution rates. Once authorized, the surcharge is at the rate of 5% for the first 12 months and 10% for any periods thereafter, until certain conditions are met. Contributing employers, however, may eliminate the surcharge by entering into a collective bargaining agreement that meets the requirements of the applicable FIP or RP.
[2] Zone status is defined by the Department of Labor and Pension Protection Act of 2006 and represents the level at which the plan is funded. Plans in the red zone are less than 65% funded plans in the green zone are at least 80% funded. Status is based on information received from pension plans and is certified by the pension plans actuary.
[3] The "FIP/RP Status" column indicates plans for which a Funding Improvement Plan ("FIP”) or a Rehabilitation Plan ("RP") has been implemented or is pending. The most recent Pension Protection Act zone status available in 2017 and 2016 is for the plans’ year-end December 31, 2016 and 2015, respectively.
[4] The Company was listed in the Form 5500 for the Pension Plan Private Sanitation Union Local 813 IBT as individually significant for contributing more than 5% of total contributions to the plan during the plan years ended December 31, 2016 and 2015. At the date these financial statements were issued, Forms 5500 were not available for the plans for the year 2017.