EMPLOYEE BENEFIT PLANS (Details) - Plan assets and benefit obligation of the defined benefit plans € in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2014 EUR (€)
Change in benefit obligation:
Actuarial (gain) loss	$ (3,320)
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	144,625
Fair value of plan assets at end of fiscal year	144,316	$ 144,625
Defined Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	184,846	194,327
Interest cost	5,465	7,526	$ 8,205
Benefits paid	(10,460)	(10,300)
Actuarial (gain) loss	9,305	(6,707)
Benefit obligation at end of fiscal year	189,156	184,846	194,327
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	144,625	154,966
Actual return on plan assets	10,151	(1,711)
Company contributions	0	1,670
Benefits paid	(10,460)	(10,300)
Fair value of plan assets at end of fiscal year	144,316	144,625	154,966
Projected benefit obligation in excess of plan assets	(44,840)	(40,221)
Amounts recognized in the statement of financial position consist of:
Accrued liabilities	0	0
Other liabilities (long-term)	(44,840)	(40,221)
Total Liabilities	(44,840)	(40,221)
Net actuarial losses	38,115	29,158
Prior service cost	1	2
Deferred taxes	(13,341)	(10,206)
Total Accumulated other comprehensive loss, net of tax	24,775	18,954
Net amount recognized at September 30,	(20,065)	(21,267)
Accumulated benefit obligations	189,156	184,846
Information for plans with accumulated benefit obligations in excess of plan assets:
ABO	189,156	184,846
PBO	189,156	184,846
Fair value of plan assets	144,316	144,625
Supplemental Employee Retirement Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	37,305	38,207
Interest cost	1,243	1,302	1,497
Benefits paid	(4,060)	(4,082)
Actuarial (gain) loss	1,286	1,878
Benefit obligation at end of fiscal year	35,774	37,305	38,207
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	0	0
Actual return on plan assets	0	0
Company contributions	4,060	4,082	1,776	€ 1,300
Benefits paid	(4,060)	(4,082)
Fair value of plan assets at end of fiscal year	0	0	$ 0
Projected benefit obligation in excess of plan assets	(35,774)	(37,305)
Amounts recognized in the statement of financial position consist of:
Accrued liabilities	(4,030)	(4,056)
Other liabilities (long-term)	(31,744)	(33,249)
Total Liabilities	(35,774)	(37,305)
Net actuarial losses	21,195	21,139
Prior service cost	56	71
Deferred taxes	(7,438)	(7,423)
Total Accumulated other comprehensive loss, net of tax	13,813	13,787
Net amount recognized at September 30,	(21,961)	(23,518)
Accumulated benefit obligations	35,774	37,305
Information for plans with accumulated benefit obligations in excess of plan assets:
ABO	35,774	37,305
PBO	35,774	37,305
Fair value of plan assets	$ 0	$ 0