Acquisitions - Contingent Acquisition Consideration (Details) (DEI Services Corporation, USD $) In Millions, unless otherwise specified	1 Months Ended
Apr. 30, 2012	Jun. 30, 2013
DEI Services Corporation
Business Acquisition, Contingent Consideration [Line Items]
Business Acquisition, Contingent Consideration, Cumulative Amount Paid		$ 5.0
Cash payments	$ 2.1

Cumulative amount of contingent consideration paid to date

No definition available.

Name:	ktos_BusinessAcquisitionContingentConsiderationCumulativeAmountPaid
Namespace Prefix:	ktos_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant