PENSION, PROFIT SHARING AND OTHER BENEFIT PLANS (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2010
Defined Contribution Plans
Company contributions to defined contribution plan	$ 15,600	$ 14,200	$ 19,600
Amounts recognized in Accumulated OCI
Valuation allowance on deffered tax asset	(47,887)	(54,759)
Components of net periodic pension cost (benefit)
Settlement loss	$ 2,671
Equity securities
Weighted-average assumptions used to determine net periodic benefit cost at the end of the year
Target allocation percentage, minimum	20.00%
Target allocation percentage, maximum	55.00%
Debt securities
Weighted-average assumptions used to determine net periodic benefit cost at the end of the year
Target allocation percentage, minimum	25.00%
Target allocation percentage, maximum	75.00%
Cash
Weighted-average assumptions used to determine net periodic benefit cost at the end of the year
Target allocation percentage, minimum	0.00%
Target allocation percentage, maximum	55.00%
Real Estate
Weighted-average assumptions used to determine net periodic benefit cost at the end of the year
Target allocation percentage, minimum	0.00%
Target allocation percentage, maximum	10.00%
Defined Benefit Pension Plans
Defined Contribution Plans
Number of European employees covered by contributory defined benefit pension plan for which benefits were frozen (as a percent)				50.00%
Expected contribution to defined benefit pension plans in next fiscal year	$ 3,900
Unrecognized actuarial loss expected to be recognized in net pension cost over next fiscal year	4,200
Unrecognized actuarial loss expected to be recognized in net pension cost over next fiscal year, net of tax	3,200
Projected benefit obligation, ABO and fair value of plan assets for the defined benefit pension plans in which the ABO was in excess of the fair value of plan assets
Projected benefit obligation	241,117	227,527
Accumulated benefit obligation	241,117	227,527
Fair value of plan assets	194,253	201,502
Change in benefit obligations:
Net benefit obligation at the beginning of the year	227,527	224,201
Service cost	595	670	636
Interest cost	8,972	9,073	9,967
Actuarial loss	41,583	8,203
Gross benefits paid	(8,365)	(7,047)
Settlements	(10,424)
Foreign currency exchange rate changes	(18,771)	(7,573)
Net benefit obligation at the end of the year	241,117	227,527	224,201
Change in plan assets:
Fair value of plan assets at the beginning of the year	201,502	206,982
Actual return on plan assets	23,775	2,815
Employer contributions	4,271	6,206
Gross benefits paid	(8,365)	(7,047)
Settlements	(10,424)
PBGC Premium paid	(362)
Administrative expenses	(925)	(682)
Foreign currency exchange rate changes	(15,219)	(6,772)
Fair value of plan assets at the end of the year	194,253	201,502	206,982
Unfunded status of the plans	(46,864)	(26,025)
Unrecognized net actuarial loss	72,909	51,087
Net amount recognized	26,045	25,062
Amounts recognized in Accumulated OCI
Liability adjustment to OCI	(72,909)	(51,087)
Deferred tax asset	19,236	15,260
Valuation allowance on deffered tax asset	(5,153)	(3,415)
Accumulated other comprehensive loss	(58,826)	(39,242)
Components of net periodic pension cost (benefit)
Service cost	595	670	636
Interest cost	8,972	9,073	9,967
Expected return on plan assets	(13,182)	(13,835)	(13,183)
Amortization of actuarial loss	1,869	705	802
Settlement loss	2,671
Administrative expenses	177	163	152
Net pension benefit	$ 1,102	$ (3,224)	$ (1,626)
Weighted-average assumptions used to determine benefit obligation at the end of the year
Discount rate (as a percent)	3.00%	4.10%	4.20%
Rate of compensation increase (as a percent)	3.10%	3.10%	3.20%
Weighted-average assumptions used to determine net periodic benefit cost at the end of the year
Discount rate (as a percent)	4.10%	4.20%	4.80%
Expected return on plan assets (as a percent)	6.80%	6.90%	7.00%
Rate of compensation increase (as a percent)	3.10%	3.20%	4.40%
Defined Benefit Pension Plans | Real Estate
Change in plan assets:
Fair value of plan assets at the beginning of the year	$ 8,166
Fair value of plan assets at the end of the year	7,561	$ 8,166
Non-qualified deferred compensation plan
Deferred compensation plans
Liabilities associated with the non-qualified deferred compensation plan	10,600	9,900
Assets set aside to fund deferred compensation liabilities	$ 3,600	2,900
Non-qualified deferred compensation plan | Life insurance contracts
Deferred compensation plans
Assets set aside to fund deferred compensation liabilities		1,900
Non-qualified deferred compensation plan | Marketable securities
Deferred compensation plans
Assets set aside to fund deferred compensation liabilities		$ 1,000