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Long-Term Debt (Details Textuals) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Jun. 30, 2011
Nov. 30, 2026
Sep. 30, 2020
Dec. 31, 2016
Nov. 30, 2016
Mar. 31, 2016
Dec. 31, 2014
Mar. 31, 2013
Apr. 15, 2011
Long-Term Debt (Textuals) [Abstract]                  
Interest rates on debt instruments   7.875% 6.50% 6.84% 7.375% 5.875% 6.34% 6.875% 5.875%
Percentage of aggregate principal amount of the notes included in the redemption price                 100.979%
Recognized debt extinguishment costs $ 1.7                
5.875% Senior Notes due April 2016 [Member]
                 
Debt Instrument [Line Items]                  
Aggregate principal amount outstanding                 218.1