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DEBT - Additional Information (Detail) - USD ($)
Aug. 02, 2017
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Consolidated leverage ratio, current   350.00%  
Maximum consolidated leverage ratio possible on MDL Settlement   400.00%  
Subsequent event      
Debt Instrument [Line Items]      
Minimum consolidated leverage ratio to trigger increase in interest rate 375.00%    
Upper range of consolidated leverage ratio to allow increase in interest rate 400.00%    
Allowable increment in interest rate on consolidated leverage ratio exceeds 3.75 0.50%    
$1.20 billion senior credit facility weighted average rate 2.23%, due in 2019      
Debt Instrument [Line Items]      
Revolving credit facility, amount committed to outstanding letters of credit   $ 133,600,000 $ 138,000,000
Revolving credit facility, unused portion   675,800,000 $ 654,900,000
Maximum borrowing capacity of line of credit facility   1,200,000,000  
$175 million private placement notes 3.89%, due in 2017      
Debt Instrument [Line Items]      
Long-term debt, face amount   $ 175,000,000