Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Comprehensive income (loss)
Net loss	$ (46,726)	$ (71,501)
Other comprehensive income (loss):
Foreign currency translation adjustment	(8,359)	2,358
Income (loss) on cash flow hedges	0	(166)
Less tax effect of other comprehensive income (loss) items	2,046	(542)
Other comprehensive (loss) income	(6,313)	1,650
Comprehensive loss	(53,039)	(69,851)
Less comprehensive loss attributable to Summit Holdings	(1,967)	(2,663)
Comprehensive loss attributable to Summit Inc.	(51,072)	(67,188)
Summit Materials, LLC
Comprehensive income (loss)
Net loss	(63,625)	(91,564)
Other comprehensive income (loss):
Foreign currency translation adjustment	(8,359)	2,358
Income (loss) on cash flow hedges	0	(166)
Other comprehensive (loss) income	(8,359)	2,192
Comprehensive loss attributable to Summit Inc.	$ (71,984)	$ (89,372)