CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities
Net income	$ 148,549	$ 135,605	$ 123,785
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	75,596	77,749	81,173
Compensation Charge Paid By Shareholders	0	0	6,625
(Gain)/loss on disposal of property, plant and equipment	93	(91)	0
(Gain)/loss on derivative instruments	(421)	(1,961)	3,302
(Gain)/loss on foreign currency transactions, net	12,355	5,873	(5,668)
Deferred income taxes	(2,665)	(17,274)	(17,173)
Amortization of debt issuance cost	554	631	587
Share-based compensation expense	12,813	8,623	7,604
Changes in assets and liabilities
Accounts receivable	(13,174)	(38,301)	(14,202)
Inventories	(26,778)	8,824	(19,542)
Prepaid expenses and other current assets	(14,345)	(1,935)	8,861
Restricted cash	(698)	646	20
Other non current assets	(278)	(290)	(453)
Trade accounts payable	16,398	4,600	6,191
Accrued liabilities and deferred income	22,857	(6,674)	2,566
Other non-current liabilities	7,555	15,144	(2,997)
Income taxes receivable	(59)	1,954	(697)
Income taxes payable	(6,327)	8,246	(1,129)
Net cash provided by operating activities	232,025	201,369	178,853
Cash flows from investing activities
Investment in property, plant and equipment	(70,715)	(47,131)	(56,958)
Proceeds from sale of property, plant and equipment	83	105	0
Prepayments for other assets	0	(4,612)	0
Purchase of intangible assets	(1,194)	(514)	(203)
Purchase of long-term investments	0	0	(145)
Acquisition of businesses, net of cash acquired	(35,019)	0	(20,836)
Net cash used in investing activities	(106,845)	(52,152)	(78,142)
Cash flows from financing activities
Repayments of short-term and long-term debt	(98)	(434,364)	0
Proceeds from borrowings	0	138,932	0
Purchase of treasury stock	(42,897)	(49,309)	(19,465)
Debt issuance cost	0	(2,765)	0
Purchase of shares from noncontrolling interest	(1,386)	0	0
Dividend distributions to noncontrolling interest	(1,435)	(1,689)	(487)
Common shares issued under share based compensation plans	7,926	3,932	11,138
Tax effect of common shares exercised under share based compensation plans	(183)	(181)	8,501
Net cash used in financing activities	(38,073)	(345,444)	(313)
Change in cash and cash equivalents	87,107	(196,227)	100,398
Effect of exchange rate change on cash and cash equivalents	3,550	1,456	(6,306)
Cash and cash equivalents at beginning of period	151,088	345,859	251,767
Cash and cash equivalents at end of period	241,745	151,088	345,859
Supplemental information
Interest paid	2,848	2,966	3,380
Interest capitalized	184	237	450
Income taxes paid	65,663	44,795	46,923
Acquisition of businesses
Current assets	5,185	0	201
Non-current assets	61,237	0	47,255
Current liabilities	(7,835)	0	(269)
Non-current liabilities	(11,951)	0	(16,139)
Fair value of total consideration transferred	46,636	0	31,048
Settlement of balances	(4,544)	0	0
Cash paid	(36,673)	0	(20,895)
Fair value of liabilities incurred	$ 5,419	$ 0	$ 10,153