EMPLOYEE BENEFIT PLANS (Details) € in Thousands	12 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2014 EUR (€)	Jan. 01, 2016
EMPLOYEE BENEFIT PLANS (Details) [Line Items]
Defined contribution plan, employer discretionary contribution amount	$ 8,301,000	$ 7,988,000	$ 8,207,000
Postemployment benefits liability	$ 2,081,000	2,035,000
Change in discount rate	10.00%
Tax benefit for amortization of pension cost	$ 831,000	764,000	677,000
Defined benefit plan, actuarial gain (loss)	3,320,000
Service cost	$ 23,000
Adjusted funding target attainment percent					99.60%
Adjusted funding target attainment percent, threshold					80.00%
Defined benefit plan, target plan asset allocations	100.00%
Defined benefit plans, estimated future employer contributions in next fiscal year	$ 0
Completion period of service	1 year
Maximum compensation of proportion	$ 265,000
Employee stock ownership plan (ESOP), compensation expense	3,689,000	3,400,000	2,447,000
Employee stock ownership plan (ESOP), deferred shares, fair value	47,370,000	47,907,000
Other Postretirement Benefit Plan [Member]
EMPLOYEE BENEFIT PLANS (Details) [Line Items]
Accumulated other comprehensive income (loss), pension and other postretirement benefit plans, net of tax	(140,000)	(97,000)
Pension and other postretirement benefit expense	57,000	58,000
Supplemental Employee Retirement Plan [Member]
EMPLOYEE BENEFIT PLANS (Details) [Line Items]
Accumulated other comprehensive income (loss), pension and other postretirement benefit plans, net of tax	(13,813,000)	(13,787,000)
Company contributions	4,060,000	4,082,000	1,776,000	€ 1,300
Recognition of settlement			0
Defined benefit plan, actuarial gain (loss)	(1,286,000)	(1,878,000)
Service cost	0	$ 0	$ 0
Defined benefit plan, expected future benefit payments, next twelve months	$ 4,060,000