Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities
Net income	$ 74,840	$ 65,194
Adjustments to reconcile net income to net cash provided by operating activities
Amortization of intangible assets	4,952	2,769
Depreciation	3,543	4,132
Amortization of deferred financing costs	7,158	2,201
Bad debt and sales return reserve	64	(498)
Non-cash foreign currency exchange	1,077	14
Non-cash stock-based compensation	2,712	1,148
Excess tax benefit related to stock options exercised	(3,120)	(1,778)
Change in fair value of derivative		(1,703)
Deferred income tax provision	10,771	11,743
Loss on fixed asset disposal		354
Changes in assets and liabilities
Accounts receivable	(22,344)	(18,467)
Inventories	(53,733)	(23,148)
Income taxes receivable	22,508	(8,745)
Prepaid expenses and other assets	(4,888)	(2,789)
Accounts payable	13,656	14,758
Accrued expenses and other liabilities	(1,195)	(570)
Income taxes payable	900	1,401
Net cash provided by operating activities	56,901	46,016
Cash flows from investing activities
Purchases of property and equipment	(1,844)	(6,074)
Proceeds from sale of equipment		2,737
Net cash used in investing activities	(1,844)	(3,337)
Cash flows from financing activities
Proceeds from issuance of long-term debt	625,000	95,000
Repayment of long-term debt	(673,000)	(25,000)
Financing Fees	(7,275)
Repayment of capital lease obligations	(910)	(1,559)
Excess tax benefit related to stock options exercised	3,120	1,778
Proceeds from exercise of stock options	7,178	5,661
Payment for treasury stock	(8,452)
Net cash provided by (used in) financing activities	(54,339)	75,880
Effect of foreign currency exchange rates on cash and cash equivalents	(615)	(44)
Net increase in cash and cash equivalents	103	118,515
Cash and cash equivalents, beginning of period	60,856	45,525
Cash and cash equivalents, end of period	$ 60,959	$ 164,040