Revenue Recognition - Summary of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	$ 187,528	$ 152,845
Retention receivables	14,973	12,117
Receivables from related parties	468	721
Accounts receivable	202,969	165,683
Less: Allowance for doubtful accounts	(4,639)	(3,306)
Accounts receivable, net	198,330	162,377
Summit Materials, LLC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	187,528	152,845
Retention receivables	14,973	12,117
Receivables from related parties	468	721
Accounts receivable	202,969	165,683
Less: Allowance for doubtful accounts	(4,639)	(3,306)
Accounts receivable, net	$ 198,330	$ 162,377