Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Property, plant and equipment, accumulated depreciation, depletion and amortization	$ 554,433	$ 484,554
Intangible assets, accumulated amortization	6,041	7,854
Summit Materials, LLC
Property, plant and equipment, accumulated depreciation, depletion and amortization	554,433	484,554
Intangible assets, accumulated amortization	$ 6,041	$ 7,854
Common Class A
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	107,491,979	96,033,222
Common stock, shares outstanding	107,491,979	96,033,222
Common Class B
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	100	100
Common stock, shares outstanding	100	100