PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 5,800	$ 6,100
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	58,451		$ 62,353
Less accumulated depreciation and amortization	29,966		30,013
Property and equipment, net of accumulated depreciation and amortization	28,485		32,340
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,525		15,635
Data processing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	35,230		39,938
Office furniture and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 6,696		$ 6,780