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DEBT - Senior Notes (Narrative) (Details) - USD ($)
1 Months Ended
Jul. 31, 2014
Jun. 30, 2013
Feb. 08, 2017
5.75% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 5.75%   5.75%
Debt face amount     $ 500,000,000.0
Summit Holdings and Finance Corporation | 7.5% Senior Notes      
Debt Instrument [Line Items]      
Senior unsecured notes   $ 300,000,000.0  
Stated interest rate   7.50%  
Summit Holdings and Finance Corporation | Senior Notes Due August 2022      
Debt Instrument [Line Items]      
Senior unsecured notes $ 300,000,000.0    
Stated interest rate 5.50%    
Maturity date Aug. 15, 2022    
Finance Corp | Summit Holdings      
Debt Instrument [Line Items]      
Cumulative percentage ownership in subsidiary   100.00%