ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES [Abstract]
Accrued compensation	$ 14,750	$ 23,793
Dividends payable	4,392	0
Goods and services received, not yet invoiced	1,726	1,830
Deferred revenue and customer advances	637	538
Warranty accrual	219	209
Income taxes payable	5,496	4,276
Taxes, other than income taxes	1,021	975
Other accrued expenses	5,756	4,825
Total	$ 33,997	$ 36,446