Organization and Summary of Significant Accounting Policies - Revision (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income taxes receivable	$ 0	$ 40,657	$ 2,745
Income taxes receivable, goodwill and deferred tax asset, net included in assets held for sale		109,033	106,382
Deferred tax asset, net	33,386	24,405	39,569
Redeemable noncontrolling interest	(2,410)	2,532	16,318
Retained earnings	$ 320,537	407,825	498,360
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income taxes receivable		42,057	25,535
Income taxes receivable, goodwill and deferred tax asset, net included in assets held for sale		114,861	102,126
Deferred tax asset, net		33,192	35,412
Redeemable noncontrolling interest		3,235	16,361
Retained earnings		423,137	512,694
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income taxes receivable		(1,400)	(22,790)
Income taxes receivable, goodwill and deferred tax asset, net included in assets held for sale		(5,828)	4,256
Deferred tax asset, net		(8,787)	4,157
Redeemable noncontrolling interest		(703)	(43)
Retained earnings		$ (15,312)	$ (14,334)