Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands	12 Months Ended
	Aug. 25, 2018	Aug. 26, 2017	Aug. 27, 2016
Net revenues	$ 2,016,829,000	$ 1,547,119,000	$ 975,226,000
Cost of goods sold	1,716,993,000	1,324,542,000	862,577,000
Gross profit	299,836,000	222,577,000	112,649,000
Operating expenses:
Selling	49,850,000	35,668,000	19,823,000
General and administrative	78,089,000	55,347,000	33,209,000
Postretirement health care benefit income	0	(24,796,000)	(6,124,000)
Transaction costs	2,177,000	6,592,000	0
Amortization of intangible assets	9,328,000	24,660,000	0
Total SG&A	139,444,000	97,471,000	46,908,000
Operating income	160,392,000	125,106,000	65,741,000
Interest expense	18,246,000	16,837,000	0
Non-operating income	(494,000)	(330,000)	(457,000)
Income before income taxes	142,640,000	108,599,000	66,198,000
Provision for income taxes	40,283,000	37,269,000	20,702,000
Net income	$ 102,357,000	$ 71,330,000	$ 45,496,000
Income per common share:
Basic (in dollars per share)	$ 3.24	$ 2.33	$ 1.69
Diluted (in dollars per share)	$ 3.22	$ 2.32	$ 1.68
Weighted average common shares outstanding:
Basic (in shares)	31,596	30,648	26,925
Diluted (in shares)	31,814	30,766	27,033
Dividends paid per common share	$ 0.40	$ 0.40	$ 0.40
Other comprehensive income (loss):
Amortization of prior service credit (net of tax of $0, $15,409, and $2,947)	$ 0	$ (25,035,000)	$ (4,788,000)
Amortization of net actuarial loss (net of tax of $11, $5,976, and $621)	27,000	9,705,000	1,010,000
Increase in actuarial loss (net of tax of $0, $35, and $415)	0	(57,000)	(674,000)
Plan amendment (net of tax of $0, $2,402, and $10,895)	0	3,903,000	17,701,000
Change in fair value of interest rate swap (net of tax of $840, $314, and $0)	1,947,000	(514,000)	0
Total other comprehensive income (loss)	1,974,000	(11,998,000)	13,249,000
Comprehensive income	$ 104,331,000	$ 59,332,000	$ 58,745,000