Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Operating activities
Net income	$ 41,104	$ 48,296	$ 8,512
Less: Discontinued operations, net of tax			(12,167)
Income from continuing operations	41,104	48,296	20,679
Adjustments to reconcile income from continuing operations to net cash provided by operating activities from continuing operations:
Depreciation and amortization	17,374	14,166	5,694
Gain on early extinguishment of debt	(1,000)
Stock compensation expense	13,379	12,117	9,136
Inventory allowance	(1,122)	884	(22)
Doubtful accounts	(357)	117	221
Deferred tax (benefit) expense	(6,852)	(1,719)	66
Incremental tax benefit from exercise of common stock options	(8,588)	(16,953)	(6,597)
Changes in operating assets and liabilities:
Accounts receivable	(7,466)	(1,596)	(1,809)
Inventory	(7,470)	(132)	(392)
Prepaid expenses and other assets	14,217	17,890	7,815
Accounts payable	6,542	(7,570)	1,552
Accrued expenses and other	(2,341)	(8,534)	(691)
Profit-sharing distributions payable	274	(3,226)	1,671
Customer payables	(4,768)	2,510	2,945
Acquisition earn out payable	(5,985)	(3,826)	358
Other liabilities	(198)	205	(1)
Net cash provided by operating activities from continuing operations	46,743	52,629	40,625
Net cash used by operating activities from discontinued operations		(483)	(739)
Net cash provided by operating activities	46,743	52,146	39,886
Investing activities
Purchases of short-term investments			(10,292)
Proceeds from the sale of short-term investments			43,812
Cash paid for acquisitions and increase in goodwill and intangibles	(14,730)	(71,796)	(9,092)
Purchases of property and equipment	(5,463)	(6,793)	(4,822)
Net cash (used in) provided by investing activities	(20,193)	(78,589)	19,606
Financing activities
Principal repayments of debt	(39,000)
Repurchases of common stock		(29,999)	(3,541)
Proceeds from exercise of common stock options (net of tax)	2,532	15,491	23,639
Incremental tax benefit from exercise of common stock options	8,588	16,953	6,597
Payment of acquisition contingent liabilities	(8,185)
Net cash (used in) provided by financing activities	(36,065)	2,445	26,695
Effect of exchange rate differences on cash and cash equivalents	(158)	(309)	(476)
Net increase (decrease) in cash and cash equivalents	(9,673)	(24,307)	85,711
Cash and cash equivalents at beginning of year	104,782	129,089	43,378
Cash and cash equivalents at end of year	95,109	104,782	129,089
Less: Cash and cash equivalents of discontinued operations at end of year			105
Cash and cash equivalents of continuing operations at end of year	95,109	104,782	128,984
Supplemental disclosure of cash flow information
Cash paid for income taxes	16,760	14,482	6,245
Cash paid for interest	2,034	117	62
Note payable issued in connection with acquisition		40,000
Contingent purchase price accrued	$ 18,390	$ 7,438	$ 6,989