Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (5.625% Senior Notes) (Details)

v3.20.4
LONG-TERM DEBT (5.625% Senior Notes) (Details) - 5.625% Senior Notes Due 2026 [Member] - USD ($)
12 Months Ended
Dec. 31, 2020
Mar. 31, 2019
Debt Instrument [Line Items]    
Face amount $ 300,000,000 $ 300,000,000
Interest rate, stated percentage 5.625% 5.625%
Redemption Period Prior Stated Date [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 100.00%  
Redemption, Equity Offerings [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 105.625%  
Percentage of notes which may be redeemed 35.00%  
Redemption Period After Stated Date [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 104.219%  
Redemption, Defined Changes of Control [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 101.00%