Contract Balances - Contract Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Contract with Customer, Asset and Liability [Abstract]
Billed and billable receivables	$ 757,999	$ 763,921
Contract assets – current unbilled receivables	96,416	115,930
Contract assets – current costs to obtain	4,722	4,144
Contract assets – noncurrent unbilled receivables	11,398	12,159
Contract assets – noncurrent costs to obtain	11,357	9,584
Contract liabilities – current deferred revenue and other contract liabilities	(102,253)	(70,907)
Contract liabilities – noncurrent deferred revenue and other contract liabilities	$ (7,200)	$ (6,837)