Revenues - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Billed and billable receivables	$ 885,552	$ 763,547
Contract assets – current unbilled receivables	145,759	131,399
Contract assets – current costs to obtain	6,142	5,163
Accounts receivable, long-term	13,311	11,857
Contract assets – noncurrent costs to obtain	12,310	8,294
Contract liabilities – current deferred revenue and other contract liabilities	(139,745)	(138,469)
Contract liabilities – noncurrent deferred revenue and other contract liabilities	$ (4,607)	$ (5,522)