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GUARANTEES - Summary (Details) - USD ($)
9 Months Ended
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Guarantor Obligations [Line Items]      
Amounts guaranteed (not to exceed) $ 176,762,000 $ 150,900,000 $ 165,333,000
Amounts outstanding under guarantee 79,336,000 126,835,000 96,154,000
Fair value of guarantees $ 2,890,000 5,864,000 2,913,000
Number of years before expiring guarantees 1 year    
Financial Guarantee      
Guarantor Obligations [Line Items]      
Amounts outstanding under guarantee $ 0 $ 14,807,000 $ 0