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LONG-TERM DEBT Fair Value of Debt by Year (Tables)
12 Months Ended
Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
March 31, 2019
 
March 31, 2018
Carrying
Value
 
Fair
Value
 
Carrying
Value
 
Fair
Value
$
1,488,821

 
$
1,568,037

 
$
1,438,284

 
$
1,446,151