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Supplementary Data (Unaudited)
 12 Months Ended
Dec. 28, 2019
Quarterly Financial Information [Line Items]  
Supplementary Data (Unaudited) Supplementary Data (Unaudited)
 
Supplemental financial information (unaudited) by quarter is shown below for the years ended December 28, 2019 and December 29, 2018.

 
 
2019
 
2018
 
 
4Q
 
3Q
 
2Q
 
1Q
 
4Q
 
3Q
 
2Q
 
1Q
Net revenue
 
$
506,259

 
$
665,847

 
$
552,591

 
$
305,950

 
$
445,090

 
$
625,017

 
$
549,235

 
$
289,916

Operating income (loss)
 
59,926

 
130,881

 
80,422

 
(57,671
)
 
28,545

 
108,167

 
77,279

 
(51,525
)
Net income (loss)
 
36,397

 
58,237

 
37,990

 
(71,501
)
 
(18,627
)
 
73,992

 
36,913

 
(55,948
)
Net income (loss) attributable to Summit Inc.
 
35,671

 
55,757

 
36,410

 
(68,772
)
 
(19,163
)
 
71,289

 
35,509

 
(53,729
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Basic earnings (loss) per share attributable to Summit Inc.
 
$
0.32

 
$
0.50

 
$
0.32

 
$
(0.62
)
 
$
(0.17
)
 
$
0.64

 
$
0.32

 
$
(0.49
)
Diluted earnings (loss) per share attributable to Summit Inc.
 
0.31

 
0.48

 
0.32

 
(0.62
)
 
(0.17
)
 
0.64

 
0.32

 
(0.49
)
Summit Materials, LLC  
Quarterly Financial Information [Line Items]  
Supplementary Data (Unaudited) Supplementary Data (Unaudited)
Supplemental financial information (unaudited) by quarter is shown below for the years ended December 28, 2019 and December 29, 2018:
 
 
 
2019
 
2018
 
 
4Q
 
3Q
 
2Q
 
1Q
 
4Q
 
3Q
 
2Q
 
1Q
Net revenue
 
$
506,259

 
$
665,847

 
$
552,591

 
$
305,950

 
$
445,090

 
$
625,017

 
$
549,235

 
$
289,916

Operating income (loss)
 
59,926

 
130,881

 
80,422

 
(57,671
)
 
28,545

 
108,167

 
77,279

 
(51,525
)
Net income (loss)
 
41,461

 
85,199

 
53,501

 
(91,564
)
 
(4,596
)
 
90,427

 
46,602

 
(68,596
)