Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 11,698	$ 8,813
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	5,268	3,616
Stock-based compensation expense	3,852	2,923
(Benefit) provision for deferred income taxes	(716)	806
Excess tax benefit from stock-based compensation	(412)	(787)
Other non-cash items	(358)	(428)
Changes in operating assets and liabilities, net of effects of businesses acquired:
Accounts receivable	1,162	11,112
Inventory	(4,184)	(2,988)
Prepaid income taxes	705	1,800
Prepaid expenses and other current assets	121	(439)
Other non-current assets	696	(722)
Accounts payable and accrued expenses	(5,693)	(4,909)
Deferred revenues and customer advances	1,970	(1,613)
Income taxes payable	1,778	426
Other non-current liabilities	(643)	(157)
Net cash provided by operating activities	15,244	17,453
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(70,370)
Sales and maturities of marketable securities		18,025
Purchases of property and equipment	(3,571)	(3,598)
Increase in restricted cash	(281)
Payments for acquired intangible assets	(20)	(2,175)
Net cash (used in) provided by investing activities	(74,242)	12,252
Cash flows from financing activities:
Proceeds from employee stock plans	785	1,585
Excess tax benefit from stock-based compensation	412	1,017
Payments of deferred offering costs	(30)
Payments of capital lease obligations	(102)	(136)
Net cash provided by financing activities	1,065	2,466
Effect of exchange rate changes on cash and cash equivalents	13	25
Net (decrease) increase in cash and cash equivalents	(57,920)	32,196
Cash and cash equivalents at beginning of period	162,875	56,241
Cash and cash equivalents at end of period	104,955	88,437
Cash paid during the period for:
Interest	18	12
Income taxes	4,510	389
Supplemental disclosures-non-cash activities:
Issuance of restricted stock awards to employees	6,201	7,126
Acquisition of intangible assets		495
Capital lease		$ 251