Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)		$ (6,189)	$ 10,295	$ (34,993)
Currency translation adjustment—net of tax	[1]	(1,249)	(62)	(397)
Net unrealized (gain) loss on derivatives—net of tax	[2]		(199)	304
Other comprehensive loss—net of tax		(1,249)	(261)	(93)
Comprehensive income (loss)		(7,438)	10,034	(35,086)
Comprehensive loss attributable to noncontrolling interests				632
Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation		$ (7,438)	$ 10,034	$ (34,454)

[1] Net of income tax benefit of $827, $41 and $261 for the years ended December 31, 2015, 2014 and 2013, respectively.

[2] Net of income tax (provision) benefit of $(132) and $204 for the years ended December 31, 2014 and 2013, respectively.