Revenues - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Billed and billable receivables	$ 763,547	$ 800,597
Contract assets – current unbilled receivables	131,399	125,547
Contract assets – current costs to obtain	5,163	5,167
Accounts receivable, long-term	11,857	10,199
Contract assets – noncurrent costs to obtain	8,294	10,703
Contract liabilities – current deferred revenue and other contract liabilities	(138,469)	(84,810)
Contract liabilities – noncurrent deferred revenue and other contract liabilities	$ (5,522)	$ (7,552)