Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Aug. 26, 2017	Aug. 27, 2016	Aug. 29, 2015
Cash flows from operating activities:
Net income	$ 70,196	$ 125,026	$ 124,299
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	76,073	72,983	68,164
Amortization of intangible assets	12,806	8,629	8,949
Amortization of deferred financing costs	112	184	209
Gain on sale of assets	(567)	0	0
Share-based compensation	12,462	5,628	5,366
Accretion on environmental contingencies	600	669	603
Accretion on asset retirement obligations	853	826	690
Impairment charge	55,800	0	0
Deferred income taxes	955	9,899	(3,473)
Changes in assets and liabilities, net of acquisitions:
Receivables, less reserves	(22,232)	(3,949)	(3,494)
Inventories	1,865	1,467	(2,236)
Rental merchandise in service	(5,384)	3,945	4,900
Prepaid expenses and other current assets and Other assets	12,903	(38,443)	(4,005)
Accounts payable	9,594	49	(7,648)
Accrued liabilities	11,728	31,954	17,832
Prepaid and accrued income taxes	(19,490)	(11,231)	16,761
Net cash provided by operating activities	218,274	207,636	226,917
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired	(125,457)	(16,583)	(22,359)
Capital expenditures	(108,554)	(98,235)	(101,163)
Proceeds from sale of assets	876	0	0
Other	98	149	(747)
Net cash used in investing activities	(233,037)	(114,669)	(124,269)
Cash flows from financing activities:
Proceeds from loans payable and long-term debt	0	0	6,866
Payments on loans payable and long-term debt	0	(1,301)	(13,055)
Payment of deferred financing costs	0	(813)	0
Proceeds from exercise of share-based awards, including excess tax benefits	3,102	5,313	7,799
Taxes withheld and paid related to net share settlement of equity awards	(2,386)	(5,965)	(5,002)
Payment of cash dividends	(2,898)	(2,878)	(2,869)
Net cash used in financing activities	(2,182)	(5,644)	(6,261)
Effect of exchange rate changes	2,902	(81)	(11,603)
Net (decrease) increase in cash, cash equivalents and short-term investments	(14,043)	87,242	84,784
Cash, cash equivalents and short-term investments at beginning of period	363,795	276,553	191,769
Cash, cash equivalents and short-term investments at end of period	349,752	363,795	276,553
Supplemental disclosure of cash flow information:
Interest paid	801	763	662
Income taxes paid, net of refunds received	$ 62,165	$ 73,658	$ 59,826