CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 176,386	$ 224,358
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,151	7,545
Reduction in the carrying amount of right-of-use assets	7,566	7,037
Net foreign currency losses	2,238	2,027
Stock-based compensation	25,713	24,589
Deferred income taxes	(53,472)	7,029
Provision for receivables	2,276	6,800
Other non-cash operating activities	1,507	718
Changes in assets and liabilities:
Accounts receivable	805	4,115
Contract assets, net	(49,739)	(103,538)
Contract costs	(1,218)	198
Lease liabilities	(7,908)	(7,533)
Prepaid expenses, prepaid income taxes, and other assets	12,111	(6,959)
Accounts payable, accrued expenses, income taxes payable and other liabilities	36,036	(6,847)
Deferred revenue	(5,366)	13,410
Net cash provided by operating activities	155,086	172,949
Cash flows from investing activities:
Purchases of property, equipment and leasehold improvements	(1,138)	(733)
Payments for business acquisitions, net of cash acquired	0	(16,272)
Payments for equity method investments	(617)	(926)
Payments for capitalized computer software development costs	(361)	(895)
Net cash used in investing activities	(2,116)	(18,826)
Cash flows from financing activities:
Issuance of shares of common stock	15,923	12,508
Repurchases of common stock	(234,043)	0
Payments of tax withholding obligations related to restricted stock	(12,656)	(6,719)
Deferred business acquisition payments	1,220	0
Repayments of amounts borrowed	(14,000)	(131,182)
Payments of debt issuance costs	(402)	0
Net cash used in financing activities	(246,398)	(125,393)
Effect of exchange rate changes on cash and cash equivalents	(1,208)	573
Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(94,636)	29,303
Cash and cash equivalents, beginning of period	379,853	287,796
Cash and cash equivalents, end of period	285,217	317,099
Supplemental disclosure of cash flow information:
Income taxes paid, net	42,697	49,349
Interest paid	3,975	5,672
Supplemental disclosure of non-cash activities:
Change in purchases of property, equipment and leasehold improvements included in accounts payable and accrued expenses	(99)	77
Change in repurchases of common stock included in accounts payable and accrued expenses	(4,353)	0
Lease liabilities arising from obtaining right-of-use assets	4,860	1,488
Reconciliation to amounts within the unaudited consolidated balance sheets: [Abstract]
Payments to Acquire Businesses, Gross	$ (1,220)	$ 0