CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 42,373	$ 34,168
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,968	18,839
Provision for doubtful accounts	11	(109)
Share-based compensation expense	9,921	8,974
Deferred income tax expense (benefit)	8,713	(2,425)
Non-cash foreign exchange (gain) loss	(459)	344
Loss on disposal of property, plant and equipment	38	69
Other	(1,075)	(87)
Changes in operating assets and liabilities:
Accounts receivable	1,515	(1,782)
Inventories	(1,899)	(5,331)
Prepaid expenses and other assets	(10,264)	(2,458)
Accounts payable	(3,898)	3,936
Accrued expenses, income taxes payable and other liabilities	(3,298)	13,117
Net cash provided by operating activities	59,646	67,255
Cash flows from investing activities:
Additions to property, plant and equipment	(18,369)	(8,179)
Proceeds from sales of property, plant and equipment	1	2
Purchase of patents	0	(115)
Proceeds from the sale of investments	25	50
Net cash used in investing activities	(18,343)	(8,242)
Cash flows from financing activities:
Repurchases of common stock	(41,387)	(10,764)
Net proceeds from issuance of stock	37,224	2,639
Tax benefits associated with share-based compensation expense	967	0
Principal payments under capital lease obligations	(964)	(900)
Net cash used in financing activities	(4,160)	(9,025)
Effect of exchange rate changes on cash	1,632	129
Increase in cash and cash equivalents	38,775	50,117
Cash and cash equivalents at beginning of period	254,164	199,952
Cash and cash equivalents at end of period	292,939	250,069
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property, plant and equipment in accrued liabilities and accounts payable at the end of the period	5,331	941
Issuance of restricted stock	$ 6,693	$ 4,985