CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 229,671	$ 261,362	$ 281,234
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,550	8,143	6,544
Reduction in the carrying amount of right-of-use assets	9,094	0	0
Net foreign currency (gains) losses	(945)	(1,251)	980
Stock-based compensation	31,548	27,573	22,688
Deferred income taxes	28,101	(27,129)	(109,131)
Provision for bad debts	5,255	645	1,418
Other non-cash operating activities	625	429	421
Changes in assets and liabilities:
Accounts receivable	(12,875)	(6,626)	846
Contract assets	(28,084)	(57,660)	14,932
Contract costs	(3,570)	(4,482)	(617)
Lease liabilities	(9,508)	0	0
Prepaid expenses, prepaid income taxes, and other assets	(5,288)	(2,411)	3,821
Accounts payable, accrued expenses, income taxes payable and other liabilities	(23,360)	21,921	1,156
Deferred revenue	13,044	17,799	(17,356)
Net cash provided by operating activities	243,258	238,313	206,936
Cash flows from investing activities:
Purchase of property, equipment and leasehold improvements	(1,278)	(436)	(331)
Payments for business acquisitions, net of cash acquired	(74,460)	(6,098)	(33,700)
Payments for equity method investments	(324)	0	0
Payments for capitalized computer software costs	(141)	(1,131)	(329)
Net cash used in investing activities	(76,203)	(7,665)	(34,360)
Cash flows from financing activities:
Issuance of shares of common stock	9,004	10,864	13,466
Repurchases of common stock	(152,432)	(299,214)	(205,049)
Payment of tax withholding obligations related to restricted stock	(10,167)	(14,477)	(7,896)
Deferred business acquisition payments	(4,600)	(1,700)	(8,649)
Proceeds from borrowings, net of repayments	219,163	50,000	30,000
Repayments of amounts borrowed	(8,000)	0	0
Payments of debt issuance costs	(3,533)	0	(351)
Net cash provided by (used in) financing activities	49,435	(254,527)	(178,479)
Effect of exchange rate changes on cash and cash equivalents	(620)	(360)	114
Increase (decrease) in cash and cash equivalents	215,870	(24,239)	(5,789)
Cash and cash equivalents, beginning of year	71,926	96,165	101,954
Cash and cash equivalents, end of year	287,796	71,926	96,165
Supplemental disclosure of cash flow information:
Income taxes paid, net	39,533	53,153	50,557
Interest paid	12,444	8,121	5,038
Supplemental disclosure of non-cash activities:
Change in purchases of property, equipment and leasehold improvements included in accounts payable and accrued expenses	(99)	104	(61)
Change in repurchases of common stock included in accounts payable and accrued expenses	(2,432)	786	(5,049)
Lease liabilities arising from obtaining right-of-use assets	$ 14,013	$ 0	$ 0