CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 43,613	$ 34,705
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,947	14,937
Provision for doubtful accounts	(74)	(216)
Share-based compensation expense	12,416	10,897
Deferred income tax expense	3,191	641
Non-cash foreign exchange (gain)/loss	646	(191)
Gain on disposal of property, plant and equipment	(121)	(43)
Impairment of long-lived assets	0	2,293
Other	(779)	(253)
Changes in operating assets and liabilities:
Accounts receivable	8,378	(889)
Inventories	(5,156)	(7,492)
Prepaid expenses and other assets	(7,487)	(1,250)
Accounts payable	1,493	(3,839)
Accrued expenses, income taxes payable and other liabilities	3,788	(12,564)
Net cash provided by operating activities	73,855	36,736
Cash flows from investing activities:
Additions to property, plant and equipment	(8,948)	(10,242)
Proceeds from the sale of property, plant and equipment	201	190
Proceeds from the sale of investments	202	2,305
Other investing activities	0	1,062
Net cash used in investing activities	(8,545)	(6,685)
Cash flows from financing activities:
Issuance of long-term debt	0	17,500
Repayment of long-term debt	(6,563)	(4,375)
Repurchases of common stock	(42,246)	(47,709)
Net proceeds from issuance of stock	34,256	41,661
Tax benefits associated with share-based compensation expense	6,185	2,788
Debt issuance costs	0	(550)
Net cash provided by (used in) financing activities	(8,368)	9,315
Effect of exchange rate changes on cash	(2,404)	120
Increase in cash and cash equivalents	54,538	39,486
Cash and cash equivalents at beginning of period	284,155	226,029
Cash and cash equivalents at end of period	338,693	265,515
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	$ 1,422	$ 945