DERIVATIVE FINANCIAL INSTRUMENTS (Schedule of Outstanding Derivative Financial Instruments) (Details) £ in Thousands, $ in Thousands		Dec. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 GBP (£)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional amount		$ 150,000	$ 150,000
Fair Value			$ 327
Float Rate			2.48%	2.48%
Fix Rate			2.09%	2.09%
Interest Rate Swap One [Member]
Derivatives, Fair Value [Line Items]
Notional amount	[1]		$ 150,000
Fair Value	[1]		$ (101)
Fix Rate	[1]		2.24%	2.24%
Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount | £				£ 700
Fair Value | £				£ 7
Forward Contracts One [Member]
Derivatives, Fair Value [Line Items]
Notional amount			$ 7,500
Fair Value			$ (227)

[1] This swap represents a forward contract and will be effective in November 2019.