CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 139,951	$ 118,407	$ 85,783
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,061	6,216	5,215
Net foreign currency (gain) loss	(3,666)	(1,552)	1,934
Stock-based compensation	15,727	14,584	14,056
Deferred income taxes	2,499	20,112	34,596
Provision for bad debts	260	(513)	1,793
Tax benefits from stock-based compensation	2,208	37,024	727
Excess tax benefits from stock-based compensation	(2,208)	(37,024)	(727)
Other non-cash operating activities	321	1,619	1,847
Changes in assets and liabilities:
Accounts receivable	9,382	8,028	(3,179)
Unbilled services	0	526	301
Prepaid expenses, prepaid income taxes, and other assets	(7,681)	4,070	947
Installment receivables	1,575	(364)	13,607
Accounts payable, accrued expenses and other liabilities	(4,489)	5,933	906
Deferred revenue	(6,196)	14,919	42,325
Net cash provided by operating activities	153,744	191,985	200,131
Cash flows from investing activities:
Purchase of marketable securities	0	(50,065)	(68,356)
Maturities of marketable securities	58,973	85,535	60,265
Purchase of property, equipment and leasehold improvements	(3,483)	(7,645)	(4,011)
Purchase of technology intangibles	0	0	(400)
Payments for business acquisitions	(8,000)	0	0
Capitalized computer software development costs	(269)	(359)	(685)
Net cash provided by (used in) investing activities	47,221	27,466	(13,187)
Cash flows from financing activities:
Exercise of stock options	3,924	4,662	8,710
Repurchases of common stock	(178,604)	(297,246)	(121,776)
Payment of tax withholding obligations related to restricted stock	(4,480)	(5,699)	(7,831)
Excess tax benefits from stock-based compensation	2,208	37,024	727
Proceeds from credit agreement	140,000	0	0
Payments of credit agreement issuance costs	(1,707)	0	0
Net cash used in financing activities	(38,659)	(261,259)	(120,170)
Effect of exchange rate changes on cash and cash equivalents	(219)	(1,469)	320
(Decrease) increase in cash and cash equivalents	162,087	(43,277)	67,094
Cash and cash equivalents, beginning of year	156,249	199,526	132,432
Cash and cash equivalents, end of year	318,336	156,249	199,526
Supplemental disclosure of cash flow information:
Income tax paid, net	69,028	3,712	7,157
Interest paid	963	30	37
Supplemental disclosure of non-cash investing and financing activities:
Change in landlord improvement allowance included in leasehold improvements and deferred rent liability	0	6,064	0
Change in purchases of property, equipment and leasehold improvements included in accounts payable and accrued expenses	(825)	675	0
Change in common stock repurchases included in accounts payable and accrued expenses	$ 1,462	$ 1,098	$ 0