CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 72,011	$ 73,454
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,300	3,020
Net foreign currency gains	(2,301)	(1,444)
Stock-based compensation	9,630	7,935
Deferred income taxes	182	(133)
Provision for bad debts	56	176
Tax benefits from stock-based compensation	1,032	1,831
Excess tax benefits from stock-based compensation	(1,032)	(1,831)
Other non-cash operating activities	40	271
Changes in assets and liabilities, excluding initial effects of acquisitions:
Accounts receivable	2,494	15,720
Prepaid expenses, prepaid income taxes, and other assets	3,661	1,993
Accounts payable, accrued expenses, income taxes payable and other liabilities	5,084	(3,307)
Deferred revenue	(40,740)	(58,513)
Net cash provided by operating activities	53,417	39,172
Cash flows from investing activities:
Purchases of marketable securities	(683,748)	0
Maturities of marketable securities	613,379	32,049
Purchases of property, equipment and leasehold improvements	(1,374)	(1,781)
Payments for business acquisitions, net of cash acquired	(36,171)	0
Payments for capitalized computer software costs	(100)	0
Net cash (used in) provided by investing activities	(108,014)	30,268
Cash flows from financing activities:
Exercises of stock options	4,843	2,445
Repurchases of common stock	(199,584)	(56,790)
Payments of tax withholding obligations related to restricted stock	(2,786)	(2,188)
Excess tax benefits from stock-based compensation	1,032	1,831
Net cash used in financing activities	(196,495)	(54,702)
Effect of exchange rate changes on cash and cash equivalents	(218)	(364)
(Decrease) increase in cash and cash equivalents	(251,310)	14,374
Cash and cash equivalents, beginning of period	318,336	156,249
Cash and cash equivalents, end of period	67,026	170,623
Supplemental disclosure of cash flow information:
Income taxes paid, net	25,000	34,497
Interest paid	1,579	14
Supplemental disclosure of non-cash investing and financing activities:
Change in purchases of property, equipment and leasehold improvements included in accounts payable and accrued expenses	506	(295)
Change in common stock repurchases included in accrued expenses	$ 416	$ (1,724)