CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 128,080	$ 158,869
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,028	6,063
Reduction in the carrying amount of right-of-use assets	6,518	0
Net foreign currency losses	183	23
Stock-based compensation	24,133	21,454
Deferred income taxes	(382)	(49,847)
Provision for bad debts	3,391	474
Other non-cash operating activities	423	341
Changes in assets and liabilities:
Accounts receivable	(16,428)	(4,183)
Contract assets	8,256	(27,397)
Contract costs	(1,522)	(3,825)
Lease liabilities	(6,840)	0
Prepaid expenses, prepaid income taxes, and other assets	(2,201)	201
Accounts payable, accrued expenses, income taxes payable and other liabilities	(20,752)	32,980
Deferred revenue	13,701	17,983
Net cash provided by operating activities	143,588	153,136
Cash flows from investing activities:
Purchases of property, equipment and leasehold improvements	(1,111)	(206)
Payments for business acquisitions, net of cash acquired	(74,460)	0
Payments for equity method investments	(319)	0
Payments for capitalized computer software costs	(141)	(1,094)
Net cash used in investing activities	(76,031)	(1,300)
Cash flows from financing activities:
Issuance of shares of common stock	5,364	5,881
Repurchases of common stock	(150,621)	(224,182)
Payments of tax withholding obligations related to restricted stock	(8,246)	(11,916)
Deferred business acquisition payments	(4,600)	(1,700)
Proceeds from borrowings	215,163	50,000
Payments of debt issuance costs	(3,533)	0
Net cash provided by (used in) financing activities	53,527	(181,917)
Effect of exchange rate changes on cash and cash equivalents	(838)	(492)
Increase (decrease) in cash and cash equivalents	120,246	(30,573)
Cash and cash equivalents, beginning of period	71,926	96,165
Cash and cash equivalents, end of period	192,172
Supplemental disclosure of non-cash activities:
Change in purchases of property, equipment and leasehold improvements included in accounts payable and accrued expenses	(89)	10
Change in repurchases of common stock included in accounts payable and accrued expenses	(621)	818
Lease liabilities arising from obtaining right-of-use assets	11,626	0
Supplemental disclosure of cash flow information:
Income taxes paid, net	26,359	39,123
Interest paid	8,246	5,728
Reconciliation to amounts within the unaudited consolidated balance sheets: [Abstract]
Cash and cash equivalents, end of period	$ 192,172	$ 65,592