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Long-Term Debt And Equity Financings Long Term Debt and Equity Financings (Tables)
9 Months Ended
Sep. 30, 2017
Long-Term Debt And Equity Financings [Abstract]  
Schedule of Maturities of Long-term Debt
The following table presents the principal maturities schedule for the notes:
Payment Date
 
Principal Payment

August 2022
$
49.5

August 2024
 
49.5

August 2027
 
49.5

August 2030
 
49.5

August 2032
 
49.5

August 2038
 
49.5

August 2043
 
76.5

August 2050
 
76.5

Total Principal Amount of Notes
$
450.0