Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 61,277	$ 33,022
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	41,373	39,523
Equity in earnings of unconsolidated joint ventures	(4,600)	(15,877)
Distribution of earnings from unconsolidated joint ventures	10,287	12,780
Non-cash stock compensation	9,814	15,363
Impairment of long-lived assets		95,814
Loss on disposal activities	42,095	11,334
Foreign currency translation	280	7,954
Other	2,254	4,276
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable and contract assets	88,131	2,069
Prepaid expenses and other assets	30,377	(133,598)
Accounts payable	(54,711)	(119,025)
Accrued expenses and other current liabilities	89,260	(31,951)
Contract liabilities	(46,832)	97,348
Other long-term liabilities	(74,150)	(11,928)
Net cash provided by operating activities	194,855	7,104
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments for sale of discontinued operations including cash disposed	(18,149)	(90,159)
Investment in unconsolidated joint ventures	(6,027)	(36,080)
Return of investment in unconsolidated joint ventures	1,602	2,808
Proceeds from sale of investments	6,122	3,436
Proceeds from disposal of property and equipment	546	9,629
Payments for capital expenditures	(32,665)	(30,902)
Net cash used in investing activities	(48,571)	(141,268)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	441,013	409,710
Repayments of borrowings under credit agreements	(459,675)	(415,106)
Proceeds from issuance of common stock	8,366	8,099
Payments to repurchase common stock	(262,308)	(468,857)
Net distributions to noncontrolling interests	(996)	(5,349)
Other financing activities	(15,303)	2,035
Net cash used in financing activities	(288,903)	(469,468)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(790)	6,912
NET DECREASE IN CASH AND CASH EQUIVALENTS	(143,409)	(596,720)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	1,234,792	1,818,249
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,091,383	1,221,529
LESS CASH AND CASH EQUIVALENTS INCLUDED IN CURRENT ASSETS HELD FOR SALE	(8,990)	(176,781)
CASH AND CASH EQUIVALENTS OF CONTINUING OPERATIONS AT END OF PERIOD	$ 1,082,393	$ 1,044,748