Acquisitions (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Feb. 01, 2016	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Goodwill	$ 2,609,903		$ 2,189,816	$ 2,188,569
L-3 National Security Solutions, Inc. and L-3 Data Tactics, Inc. (together, "NSS")
Business Acquisition [Line Items]
Cash and cash equivalents		$ 2,596
Accounts receivable		210,441
Prepaid expenses and other current assets		11,574
Property and equipment		21,938
Intangible assets		110,500
Goodwill		385,755
Other long-term assets		437
Accounts payable		(57,616)
Accrued compensation and benefits		(38,953)
Other accrued expenses and current liabilities		(37,855)
Deferred income taxes		(55,641)
Other long-term liabilities		(5,280)
Total estimated consideration		$ 547,896