Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (7% Senior Notes) (Details)

v3.3.1.900
LONG-TERM DEBT (7% Senior Notes) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Aug. 31, 2013
Debt Instrument [Line Items]      
Debt premium $ 6,000,000 $ 7,286,000  
7% Senior Notes Due 2020 [Member]      
Debt Instrument [Line Items]      
Face amount $ 425,000,000    
Interest rate, stated percentage 7.00%   7.00%
7% Senior Notes Due 2020 [Member] | Prior to September 1, 2016 [Member]      
Debt Instrument [Line Items]      
Redemption price, percentage 100.00%    
Basis spread on make whole premium, as a percentage 0.50%    
7% Senior Notes Due 2020 [Member] | After September 1, 2016 [Member]      
Debt Instrument [Line Items]      
Redemption price, percentage 103.50%    
7% Senior Notes Due 2020 [Member] | Redemption, Defined Changes of Control [Member]      
Debt Instrument [Line Items]      
Redemption price, percentage 101.00%    
Add-on 7% Senior Notes Due 2020 [Member]      
Debt Instrument [Line Items]      
Face amount $ 200,000,000    
Debt premium     $ 9,000,000