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DEBT (Details) - USD ($)
May 02, 2018
Jun. 30, 2018
Dec. 31, 2017
Debt Instrument [Line Items]      
Note payable   $ 3,200,000 $ 5,621,000
2025 Senior Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate   7.25%  
2023 Senior Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate   7.00%  
Revolving Credit Facility [Member] | Line of Credit [Member]      
Debt Instrument [Line Items]      
Long-term Line of Credit   $ 350,000,000 $ 350,000,000
Revolving Credit Facility [Member] | Line of Credit [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Long-term Line of Credit $ 3,400,000,000    
Line of Credit Facility, Commitment Fee Percentage 0.25%    
Revolving Credit Facility [Member] | Line of Credit [Member] | Base Rate [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.00%    
Revolving Credit Facility [Member] | Line of Credit [Member] | Base Rate [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.25%    
Revolving Credit Facility [Member] | Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 2.00%    
Revolving Credit Facility [Member] | Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.25%    
Revolving Credit Facility [Member] | Line of Credit [Member] | Company Credit Rating [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.75%    
Revolving Credit Facility [Member] | Line of Credit [Member] | Company Credit Rating [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.00%    
Revolving Credit Facility [Member] | Accordion Feature [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Long-term Line of Credit $ 3,500,000,000