Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities
Net income (loss)	$ (37,992)	$ 50,316
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	208,287	146,979
Stock-based compensation	12,901	13,133
Certain interest expense and other financing costs	9,077	11,549
Beneficial lease amortization	1,714	0
Loss on debt extinguishment	0	1,726
Gain on sale of fixed assets	(3,470)	(1,131)
Deferred income taxes	3,195	(48,855)
Changes in operating assets and liabilities, net of the effects of businesses acquired in the period:
Accounts receivable	10,970	(52,024)
Inventories	(188,213)	(299,881)
Prepaid expenses and other assets	(117,520)	(19,511)
Accounts payable and accrued expenses	(93,908)	195,948
Other liabilities	62	732
Net cash provided by (used in) operating activities	(194,897)	(1,019)
Investing Activities
Purchases of property and equipment	(44,337)	(34,978)
Acquisition of businesses, net	(163,973)	(2,715,429)
Proceeds from the sale of assets	6,200	750
Net cash provided by (used in) investing activities	(202,110)	(2,749,657)
Financing Activities
Borrowings under revolving lines of credit	1,734,476	2,122,949
Repayments under revolving lines of credit	(1,404,836)	(1,631,978)
Borrowings under term loan	0	970,000
Repayments under term loan	(7,275)	(443,425)
Borrowings under senior notes	0	1,300,000
Payment of debt issuance costs	0	(65,788)
Repayments under equipment financing facilities and other	(7,602)	(8,604)
Proceeds from issuance of convertible preferred stock	0	400,000
Payment of stock issuance costs	0	(1,279)
Payment of dividends on preferred stock	(18,000)	(6,000)
Proceeds from issuance of common stock related to equity awards	1,654	6,950
Taxes paid related to net share settlement of equity awards	(3,639)	(3,975)
Net cash provided by (used in) financing activities	294,778	2,638,850
Effect of exchange rate changes on cash and cash equivalents	31	1,127
Net increase (decrease) in cash and cash equivalents	(102,198)	(110,699)
Cash and cash equivalents, beginning of period	129,927	138,250
Cash and cash equivalents, end of period	27,729	27,551
Cash paid during the period for:
Interest	138,686	91,662
Income taxes paid (received), net of refunds	$ (8,784)	$ 33,751