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Borrowings - Schedule of Long-term Debt (Details) - USD ($) | Dec. 31, 2022 | Oct. 31, 2022 | Oct. 13, 2022 | Sep. 30, 2022 | Sep. 30, 2019 | Oct. 31, 2017 | Mar. 31, 2017
--- | --- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total outstanding borrowings of unconsolidated entities | $ 984,330,000 |  |  | $ 983,440,000 |  |  |
Unamortized debt issuance costs | $ (6,907,000) |  |  | (7,280,000) |  |  |
6.750% | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate on debt instrument | 6.75% |  |  |  |  |  | 6.75%
5.875% | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate on debt instrument | 5.875% |  |  |  |  | 5.875% |
7.250% | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate on debt instrument | 7.25% |  |  |  | 7.25% |  |
Secured Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  | $ 250,000,000 | $ 265,000,000 |  |  |  |
Secured Revolving Credit Facility | $ 0 |  |  | 0 |  |  |
Letters of credit secured using cash collateral | 0 |  |  | 5,500,000 |  |  |
Line of credit facility, remaining borrowing capacity | 265,000,000 |  |  | 244,500,000 |  |  |
Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total outstanding borrowings of unconsolidated entities | 911,543,000 |  |  | 911,170,000 |  |  |
Unamortized debt issuance costs | (6,907,000) |  |  | (7,280,000) |  |  |
Senior Notes | 6.750% |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total outstanding borrowings of unconsolidated entities | 211,195,000 |  |  | 211,195,000 |  |  |
Senior Notes | 5.875% |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total outstanding borrowings of unconsolidated entities | 357,255,000 |  |  | 357,255,000 |  |  |
Senior Notes | 7.250% |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total outstanding borrowings of unconsolidated entities | 350,000,000 |  |  | 350,000,000 |  |  |
Junior Subordinated Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total outstanding borrowings of unconsolidated entities | $ 72,787,000 |  |  | $ 72,270,000 |  |  |

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- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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