Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Condensed Consolidated Statements of Cash Flows
Net cash provided by operating activities	$ 219,202	$ 162,083
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(77,905)	(89,597)
Proceeds from sale of assets	809	1,213
Proceeds from sales of short-term investments	10,259	8,970
Payments for purchases of short-term investments	(12,989)	(824)
Business acquisitions, net of cash acquired		(771,069)
Net cash used in investing activities	(79,826)	(851,307)
Cash flows from financing activities:
Cash dividends paid	(28,985)	(25,206)
Proceeds from sales of treasury stock	33,715	7,102
Payments for repurchases of common stock	(110,311)
Borrowings on revolving lines of credit and short-term borrowings	1,286,258	1,769,105
Payments on revolving lines of credit and short-term borrowings	(1,194,045)	(1,422,624)
Proceeds from issuance of long-term debt		400,000
Payments of long-term debt and capital lease obligations	(143,402)	(315)
Payments of debt financing costs	(2,238)	(1,325)
Payment for forward option derivative instrument		(5,543)
Net cash (used in) provided by financing activities	(159,008)	721,194
Effect of exchange rate changes on cash and cash equivalents	(660)	(5,123)
Net change in cash and cash equivalents	(20,292)	26,847
Cash and cash equivalents at beginning of year	83,594	87,552
Cash and cash equivalents, including restricted cash, at end of period	$ 63,302	$ 114,399