CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 4,693	$ 344,094	$ 34,383
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	13,794	13,338	13,279
Stock-based compensation expense	7,959	6,135	2,587
Inventory impairments and abandonments	15,282	3,109	8,307
Deferred and other income tax expense (benefit)	15,903	(326,360)	(12,590)
Gain on sale of fixed assets	(957)	0	0
Change in allowance for doubtful accounts	(698)	(193)	(406)
Equity in (income) loss of unconsolidated entities and marketable securities	(143)	1,294	(6,545)
Cash distributions of income from unconsolidated entities	165	224	566
Non-cash loss on extinguishment of debt	4,978	0	2,670
Changes in operating assets and liabilities:
Increase in accounts receivable	(149)	(17,757)	(11,681)
Decrease (increase) in income tax receivable	127	(373)	2,767
Decrease (increase) in inventory	129,028	(121,700)	(230,138)
(Increase) decrease in other assets	(471)	(165)	1,292
(Decrease) increase in trade accounts payable	(9,365)	7,302	22,437
(Decrease) increase in other liabilities	(17,121)	10,260	13,002
Other changes	0	(257)	(399)
Net cash provided by (used in) operating activities	163,025	(81,049)	(160,469)
Cash flows from investing activities:
Capital expenditures	(12,219)	(15,964)	(14,553)
Proceeds from sale of fixed assets	2,624	0	0
Investments in unconsolidated entities	(4,241)	(4,944)	(5,218)
Return of capital from unconsolidated entities and marketable securities	1,142	24,245	1,703
Increases in restricted cash	(5,852)	(5,546)	(15,608)
Decreases in restricted cash	30,348	29,586	1,645
Net cash provided by (used in) investing activities	11,802	27,377	(32,031)
Cash flows from financing activities:
Repayment of debt	(828,221)	(18,573)	(307,602)
Proceeds from issuance of new debt	642,150	0	325,000
Repayment of borrowings from credit facility	(90,000)	(75,000)	0
Borrowings from credit facility	90,000	75,000	0
Debt issuance costs	(11,246)	(126)	(5,490)
Other changes	(222)	(200)	287
Net cash (used in) provided by financing activities	(197,539)	(18,899)	12,195
Decrease in cash and cash equivalents	(22,712)	(72,571)	(180,305)
Cash and cash equivalents at beginning of period	251,583	324,154	504,459
Cash and cash equivalents at end of period	$ 228,871	$ 251,583	$ 324,154

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

Name:	us-gaap_RepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
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Balance Type:	debit
Period Type:	duration