BACKGROUND AND BASIS OF PRESENTATION (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2012	Mar. 31, 2011
BACKGROUND AND BASIS OF PRESENTATION [Abstract]
Income tax expense recorded for certain compensation in fiscal 2008 through 2010 for which a previous tax benefit should not have been recorded		$ 671
Adjustment to employer-paid fringe benefits for required contributions to various plans pursuant to the annual incentive cash bonus program (AIP)		1,474
Net of tax effect of adjustment to employer-paid fringe benefits for required contributions to various plans pursuant to the annual incentive cash bonus program (AIP)		1,014
Under accrual for annual incentive cash bonus program (AIP)		290
Net of tax effect of under accrual for annual incentive cash bonus program (AIP)		199
Reversal of deferred tax asset related to certain share-based compensation expense				497
Total of adjustments for the period	1,195	2,280
Diluted per share effect of total adjustments for the period	$ 0.0500	$ 0.1000
Income tax recorded to correct tax accounting related to Epoch acquisition	172
Increase cumulative translation adjustment related to acquisition of Epoch			2,172
Increase goodwill related to the acquisition of Epoch			1,712
Decrease in deferred tax liabilities related to the acquisition of Epoch			288
Correction of historical remeasurement of certain foreign cash balances	333
Correction of historical remeasurement of certain foreign cash balances, net of tax	222
Income tax expense for additional tax accounting adjustments	801
Decrease in deferred tax liabilities related to additiona tax accounting adjustments	1,104
Decrease in deferred tax assets related to additiona tax accounting adjustments	64
Decrease in income tax receivable related to additional tax accounting adjustments	891
Increase in cumulative transalation adjustment related to additional income tax adjustments	$ 950