Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES
Net income	$ 55,835	$ 42,134
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	22,367	17,661
Deferred income taxes	2,260	2,385
Equity in net (income) loss of equity-method investees	(847)	(495)
Stock based compensation	6,321	7,288
Tax benefit from stock based compensation	(6,083)	(2,305)
Contingent consideration expense	900	(3,687)
Interest accretion on contingent consideration	672	1,378
Other non-cash items, net	612	103
Increase (decrease) in cash attributable to changes in operating assets and liabilities, net of amounts applicable to acquisitions:
Accounts receivable	(26,879)	(21,003)
Inventories	3,269	(1,921)
Other current assets	(991)	(1,252)
Other assets	(2,505)	(4,787)
Accounts payable and accrued expenses	13,888	1,527
Acquisition-related contingent consideration	850	0
Income taxes	2,105	3,565
Net cash provided by operating activities	77,720	40,431
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES
Acquisitions, net of cash acquired	(243,425)	(45,317)
Purchases of property and equipment	(12,974)	(7,842)
Proceeds from disposals of property and equipment	99	1,544
Repayments from equity-method investees	7,033	1,672
Net cash used in investing activities	(249,267)	(49,943)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES
Proceeds from exercises of stock options, net of related expenses	10,509	8,224
Borrowings under bank revolving credit facility	200,994	11,100
Repayments of other long-term debt, net	(353)	(16)
Acquisition-related contingent consideration	(31,810)	0
Excess tax benefits from stock based compensation	4,544	0
Shares withheld for payment of employee payroll taxes	(2,026)	(799)
Net cash provided by financing activities	181,858	18,509
Effect of exchange rate changes on cash	3,336	(692)
Net increase (decrease) in cash and cash equivalents	13,647	8,305
Cash and cash equivalents at beginning of period	27,517	17,266
Cash and cash equivalents at end of period	$ 41,164	$ 25,571