Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (5.375% Senior Notes) (Details)

v3.8.0.1
LONG-TERM DEBT (5.375% Senior Notes) (Details) - 5.375% Senior Notes due 2022 [Member]
12 Months Ended
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]  
Face amount $ 250,000,000
Interest rate, stated percentage 5.375%
Redemption price, percentage 104.0313%
Redemption, Defined Changes of Control [Member]  
Debt Instrument [Line Items]  
Redemption price, percentage 101.00%