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Interest Rate Swap Agreements (Tables)
6 Months Ended
Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of locations and amounts of (gains) losses recognized in income
    

Three months ended

September 30,

    

Six months ended

September 30,

 
     (In thousands)      (In thousands)  
     2017      2016      2017      2016  
Periodic change in fair value of interest rate swap agreements
   $ 8      $ (121    $ 17      $ (103

Periodic settlement differentials included in interest expense

     8        55        18        118  
  

 

 

    

 

 

    

 

 

    

 

 

 

Loss (gain) recognized in income

   $ 16      $ (66    $ 35      $ 15  
  

 

 

    

 

 

    

 

 

    

 

 

 
Schedule of variable rates received and average fixed rates paid under the swap agreements
     Three months ended
September 30,
    Six months ended
September 30,
 
     2017     2016     2017     2016  
Variable rate received
     1.22     0.50     1.05     0.47

Fixed rate paid

     0.87     0.94     0.91     0.94