Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2016

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Earnings Per Share

	Three Months Ended					Nine Months Ended
	September 30, 2016			September 30, 2015		September 30, 2016			September 30, 2015
Net income (loss) attributable to Engility	$	(16,757	)	$	3,650	$	(17,493	)	$	3,379
Weighted average number of shares outstanding –    Basic		36,735			36,623		36,726			32,527
Dilutive effect of share-based compensation    outstanding after application of the treasury    stock method		—			513		—			538
Weighted average number of shares outstanding –    Diluted		36,735			37,136		36,726			33,065
Earnings (loss) per share attributable to Engility
Basic	$	(0.46	)	$	0.10	$	(0.48	)	$	0.10
Diluted	$	(0.46	)	$	0.10	$	(0.48	)	$	0.10