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DEBT - Schedule of Long Term Debt - Senior Unsecured Notes (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Principal Balance $ 1,300,000 $ 700,000
Premium, net 16,259  
Deferred financing costs 22,401  
Senior Notes [Member]    
Debt Instrument [Line Items]    
Premium, net 16,259  
Deferred financing costs 10,263 11,200
Discount   500
5.5% Senior Unsecured Notes Due 2021 [Member]    
Debt Instrument [Line Items]    
Principal Balance 500,000 500,000
5.375% Senior Unsecured Notes Due 2023 [Member]    
Debt Instrument [Line Items]    
Principal Balance 200,000 200,000
5.125% Senior Unsecured Notes Due 2026 [Member]    
Debt Instrument [Line Items]    
Principal Balance 500,000 0
5.38% Senior Unsecured Notes Due 2027 [Member]    
Debt Instrument [Line Items]    
Principal Balance $ 100,000 $ 0