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LONG-TERM DEBT Fair Value Measurements (Tables)
6 Months Ended
Sep. 30, 2016
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
 
September 30, 2016
 
March 31, 2016
 
Carrying
Value
 
Fair Value
 
Carrying
Value
 
Fair Value
Long-term debt
$
1,615,689

 
$
1,588,829

 
$
1,417,320

 
$
1,354,961