INCOME TAXES (1) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012
Income (loss) from continuing operations before income taxes [Abstract]
Total	$ 13,530		$ 8,855	$ 30,091	$ 24,207
Total U.S. and foreign	4,110		3,325	10,968	8,262
Effective income tax rate reconciliation [Abstract]
Provision for income taxes (in hundredths)	30.40%		37.50%	36.40%	34.10%
Foreign income tax adjustment		1,686		1,686
Research and development tax credit						1,100	947
Valuation allowance on former equity investment	$ 1,015