Employee Benefit Plans Summary (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent	$ (86,879)	$ (78,831)
Employee benefit obligations, net of current portion	89,994	83,802
Weighted-average assumptions:
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.20%
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	33,428	(21,496)
Accumulated Other Comprehensive Income, Pension and Other Postretirement, Benefit Plans Tax Effect	4,392	1,542
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	2,084
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	9,697
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	8,783
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	9,122
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	9,492
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	9,775
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	56,072
Amortization Period, Transition Obligation	20 years
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent	(86,879)	78,831
Benefit obligation	240,806	209,472	214,977
Service cost	2,048	2,543	2,479
Interest cost	10,593	10,380	8,239
Recognized net actuarial loss	29,834	(9,027)
Employee contributions	182	189
Benefits paid	(9,354)	(8,685)
Foreign currency exchange rate changes in obligations	(1,969)	(905)
Fair value of plan assets	153,927	130,641	125,566
Actual return on plan assets	20,112	(100)
Plan expenses paid	0	(226)
Employer contributions	12,587	14,486
Foreign currency exchange rate changes in assets	(241)	(589)
Expected return on assets	(8,225)	(7,829)	(5,774)
Amortization of prior service cost	72	0	535
Amortization of transition obligation	0	0	207
Recognized net actuarial (gain) loss	828	8	613
Net periodic benefit cost	5,316	5,102	6,299
Weighted-average assumptions:
Deferred Compensation Arrangement with Individual, Maximum Contractual Term	P15Y
Pension Plans, Defined Benefit [Member] | Minimum [Member]
Weighted-average assumptions:
Discount rate	4.00%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	4.00%	3.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.30%	0.00%
Pension Plans, Defined Benefit [Member] | Maximum [Member]
Weighted-average assumptions:
Discount rate	13.50%	13.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.80%	7.80%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	5.50%	5.50%
Defined Contribution Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan expenses paid	1,935	4,999	3,464
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee benefit obligations, net of current portion	(566)	(542)
Benefit obligation	566	542	527
Service cost	12	11	9
Interest cost	27	27	26
Recognized net actuarial loss	(14)	(21)
Employee contributions	0	0
Benefits paid	(1)	(2)
Foreign currency exchange rate changes in obligations	0	0
Fair value of plan assets	0	0	0
Actual return on plan assets	0	0
Plan expenses paid	0	0
Employer contributions	1	2
Foreign currency exchange rate changes in assets	0	0
Expected return on assets	0	0	0
Amortization of prior service cost	0	0	0
Amortization of transition obligation	0	0	0
Recognized net actuarial (gain) loss	(54)	(52)	(58)
Net periodic benefit cost	(15)	(14)	(23)
Weighted-average assumptions:
Discount rate	4.00%	5.00%
Defined Benefit Postretirement Health Coverage [Member]
Weighted-average assumptions:
Deferred Compensation Arrangement with Individual, Maximum Contractual Term	10
Age When Heath Care Benefits Begin Accruing	40
Age When Heath Care Benefits End Accruing	65
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	75,580	67,611
Fair value of plan assets	51,721	43,582
Weighted-average assumptions:
Discount rate	4.30%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.80%	7.60%
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	165,226	141,861
Fair value of plan assets	102,206	87,059
Weighted-average assumptions:
Discount rate	5.30%	4.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	5.40%	5.40%
Equity Funds [Member]
Weighted-average assumptions:
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	60.00%
Defined Benefit Plan, Actual Plan Asset Allocations	49.00%	46.00%
Equity Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	37,187
Equity Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	38,507
Fixed Income Funds [Member]
Weighted-average assumptions:
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	40.00%
Defined Benefit Plan, Actual Plan Asset Allocations	20.00%	21.00%
Fixed Income Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,534
Fixed Income Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,661
Insurance Contracts [Member]
Weighted-average assumptions:
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	100.00%
Defined Benefit Plan, Actual Plan Asset Allocations	31.00%	33.00%
Insurance Contracts [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	40,651
Other than Securities Investment [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,387
Fair Value, Inputs, Level 1 [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20,520
Fair Value, Inputs, Level 1 [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 1 [Member] | Equity Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20,520
Fair Value, Inputs, Level 1 [Member] | Equity Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 1 [Member] | Insurance Contracts [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 1 [Member] | Other than Securities Investment [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 2 [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31,201
Fair Value, Inputs, Level 2 [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	102,206
Fair Value, Inputs, Level 2 [Member] | Equity Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16,667
Fair Value, Inputs, Level 2 [Member] | Equity Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	38,507
Fair Value, Inputs, Level 2 [Member] | Fixed Income Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,534
Fair Value, Inputs, Level 2 [Member] | Fixed Income Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,661
Fair Value, Inputs, Level 2 [Member] | Insurance Contracts [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	40,651
Fair Value, Inputs, Level 2 [Member] | Other than Securities Investment [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,387
Fair Value, Inputs, Level 3 [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 [Member] | Equity Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 [Member] | Equity Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 [Member] | Fixed Income Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 [Member] | Fixed Income Funds [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 [Member] | Insurance Contracts [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Inputs, Level 3 [Member] | Other than Securities Investment [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0