Accounts Receivable, Net - Summary of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	$ 285,062	$ 152,845
Retention receivables	13,536	12,117
Receivables from related parties	348	721
Accounts receivable	298,946	165,683
Less: Allowance for doubtful accounts	(3,455)	(3,306)
Accounts receivable, net	$ 295,491	162,377
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
General collection and billing period for retention receivables	1 year
Summit Materials, LLC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	$ 285,062	152,845
Retention receivables	13,536	12,117
Receivables from related parties	348	721
Accounts receivable	298,946	165,683
Less: Allowance for doubtful accounts	(3,455)	(3,306)
Accounts receivable, net	$ 295,491	$ 162,377