Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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Amount of unrecognized tax benefits.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
INCOME TAXES (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
INCOME TAXES [Abstract]
Income tax provision	$ 3,607	$ 6,537	$ 7,049	$ 10,359
Effective income tax rate	35.00%	36.00%	35.00%	36.00%
Unrecognized tax benefits	$ 0		$ 0		$ 0
Penalties and interest expense related to unrecognized tax benefits	$ 0	$ 0	$ 0	$ 0
State of California [Member] \| Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year			2014
State of California [Member] \| Maximum [Member]
Income Tax Contingency [Line Items]
Open tax year			2015
German Tax Authorities [Member] \| Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year			2013
German Tax Authorities [Member] \| Maximum [Member]
Income Tax Contingency [Line Items]
Open tax year			2015