CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (23,851)	$ (9,763)
Other comprehensive income (loss), net of tax:
Net unrealized loss on derivatives	52	(891)
Less: reclassification for net losses included in interest expense	69	0
Net change	121	(891)
Foreign currency translation adjustments, net	(7)	822
Other comprehensive income (loss)	114	(69)
Comprehensive loss	(23,737)	(9,832)
Non-controlling interests in comprehensive loss	61	(678)
Comprehensive loss attributable to Granite	$ (23,676)	$ (10,510)