Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities:
Net earnings	$ 131,452	$ 144,635
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	53,275	54,009
Share-based compensation expense	5,871	5,850
Amortization of deferred financing costs	1,979	1,851
(Gain) loss on extinguishment of debt	(473)	876
(Gain) loss on disposal of equipment and other property	(6,548)	42
Deferred income taxes	8,530	(29,379)
Changes in (exclusive of effects of acquisitions):
Trade accounts receivable	5,950	(1,506)
Accounts receivable, other	(7,554)	(3,990)
Inventory	(14,213)	3,266
Other current assets	2,754	3,508
Other assets	(1,293)	143
Accounts payable and accrued liabilities	(69,704)	(12,175)
Income taxes payable	4,150	(762)
Other liabilities	(4,066)	13,082
Net cash provided by operating activities	110,110	179,450
Cash Flows from Investing Activities:
Payments for property and equipment	(46,398)	(38,693)
Proceeds from sale of property and equipment	12,010	14
Acquisitions, net of cash acquired	(2,848)	(9,175)
Net cash used by investing activities	(37,236)	(47,854)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt	242,504	246,819
Repayments of long-term debt	(304,157)	(260,142)
Debt issuance costs		(1,151)
Payments for common stock repurchased		(114,699)
Proceeds from exercises of stock options	1,721	1,112
Net cash used by financing activities	(59,932)	(128,061)
Effect of foreign exchange rate changes on cash and cash equivalents	(460)	762
Net increase in cash and cash equivalents	12,482	4,297
Cash and cash equivalents, beginning of period	77,295	63,759
Cash and cash equivalents, end of period	89,777	68,056
Supplemental Cash Flow Information:
Interest paid	48,378	46,574
Income taxes paid	37,518	45,089
Capital expenditures incurred but not paid	$ 3,763	$ 1,426