Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Deferred tax assets:
Federal and state credits	$ 4,055
Capital loss carryforwards	0
Net operating loss carryforwards	906
Contract assets and costs	(156,346)
Deferred revenue	5,252
Other reserves and accruals	6,082
Intangible assets	1,020
Property, leasehold improvements, and other basis differences	1,433
Other temporary differences	453
Deferred tax assets, total	19,201
Deferred tax liabilities:
Contract assets and costs	(8,610)
Intangible assets	(5,635)
Property, leasehold improvements, and other basis differences	(1,146)
Deferred Tax Liabilities, Gross	171,737
Deferred tax liabilities, total	(157,402)
Valuation allowance	$ (4,866)	$ (10,400)
Accounting Standards Update 2014-09 (Topic 606) [Member]
Deferred tax assets:
Federal and state credits		4,363
Capital loss carryforwards		4,856
Net operating loss carryforwards		1,452
Contract assets and costs		(121,631)
Deferred revenue		3,163
Other reserves and accruals		6,550
Intangible assets		1,015
Property, leasehold improvements, and other basis differences		1,646
Other temporary differences		450
Deferred tax assets, total		23,495
Deferred tax liabilities:
Contract assets and costs		(68,546)
Intangible assets		(5,231)
Property, leasehold improvements, and other basis differences		(1,340)
Deferred Tax Liabilities, Gross		196,748
Deferred tax liabilities, total		(183,669)
Valuation allowance		$ (10,416)