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Leases (Tables) | 12 Months Ended
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Sep. 30, 2023
Leases |
Schedule of components of lease costs | The components of lease costs are shown below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended |  | Year Ended
​ | ​ | September 30, | ​ | September 30,
(Dollars in thousands) |  | 2023 |  | 2022
Finance lease cost: |  | ​ |  | ​ | ​ | ​
Amortization | ​ | $ | 1,572 | ​ | ​ | 1,572
Interest on lease liabilities | ​ |  | 925 | ​ | ​ | 973
Operating lease cost | ​ |  | 7,224 | ​ | ​ | 6,347
Total lease cost | ​ | $ | 9,721 | ​ | ​ | 8,892
Schedule of additional information related to leases | Additional information related to leases is shown below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended |  | Year Ended |
​ | ​ | September 30, | ​ | September 30, | ​
(Dollars in thousands) | ​ | 2023 | ​ | 2022 | ​
Cash paid for amounts included in the measurement of lease liabilities: | ​ | ​ | ​ |  | ​ |  |
Operating cash flows from operating leases | ​ | $ | 6,964 | ​ | ​ | 6,101 |
Operating cash flows from finance leases | ​ | ​ | 925 | ​ | ​ | 973 |
Financing cash flows from finance leases | ​ | ​ | 1,331 | ​ | ​ | 1,224 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Right-of-use assets obtained in exchange for operating lease liabilities | ​ | $ | 16,243 | ​ | ​ | 4,160 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average remaining lease term: | ​ | ​ | ​ | ​ |  | ​ |
Operating leases | ​ | ​ | 11.1 | yrs |  | 9.3 | yrs
Finance leases | ​ | ​ | 11.1 | yrs |  | 12.0 | yrs
Weighted-average discount rate: | ​ | ​ | ​ | ​ |  | ​ |
Operating leases | ​ | ​ | 4.5 | % |  | 3.2 | %
Finance leases | ​ | ​ | 4.6 | % |  | 4.6 | %
Schedule of reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended |  | Year Ended |
​ | ​ | September 30, | ​ | September 30, | ​
(Dollars in thousands) | ​ | 2023 | ​ | 2022 | ​
Cash paid for amounts included in the measurement of lease liabilities: | ​ | ​ | ​ |  | ​ |  |
Operating cash flows from operating leases | ​ | $ | 6,964 | ​ | ​ | 6,101 |
Operating cash flows from finance leases | ​ | ​ | 925 | ​ | ​ | 973 |
Financing cash flows from finance leases | ​ | ​ | 1,331 | ​ | ​ | 1,224 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Right-of-use assets obtained in exchange for operating lease liabilities | ​ | $ | 16,243 | ​ | ​ | 4,160 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average remaining lease term: | ​ | ​ | ​ | ​ |  | ​ |
Operating leases | ​ | ​ | 11.1 | yrs |  | 9.3 | yrs
Finance leases | ​ | ​ | 11.1 | yrs |  | 12.0 | yrs
Weighted-average discount rate: | ​ | ​ | ​ | ​ |  | ​ |
Operating leases | ​ | ​ | 4.5 | % |  | 3.2 | %
Finance leases | ​ | ​ | 4.6 | % |  | 4.6 | %
​ The table below is a reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets, presented on our Consolidated Balance Sheet on September 30, 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) | ​ | Operating | ​ | Finance
Years Ending September 30: |  | Leases |  | Leases
2024 | ​ | $ | 6,826 | ​ | ​ | 2,315
2025 | ​ |  | 5,645 | ​ | ​ | 2,370
2026 | ​ |  | 4,436 | ​ | ​ | 2,434
2027 | ​ |  | 4,229 | ​ | ​ | 2,494
2028 and thereafter | ​ |  | 32,806 | ​ | ​ | 16,503
Total minimum lease payments | ​ | ​ | 53,942 | ​ | ​ | 26,116
Less: amounts representing interest | ​ |  | 12,262 | ​ | ​ | 6,265
Present value of net minimum lease payments | ​ | $ | 41,680 | ​ | ​ | 19,851
Less: current portion of lease obligations | ​ |  | 5,126 | ​ | ​ | 1,444
Non-current portion of lease obligations | ​ | ​ | 36,554 | ​ | ​ | 18,407
​ | ​ | ​ | ​ | ​ | ​ | ​
ROU assets | ​ | $ | 39,839 | ​ | ​ | 15,771
​ The table below is a reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets, presented on our Consolidated Balance Sheet on September 30, 2022: ​
​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) |  | Operating |  | Finance
Years Ending September 30: | ​ | Leases | ​ | Leases
2023 | ​ | $ | 5,953 |  | 2,256
2024 | ​ |  | 5,132 |  | 2,315
2025 | ​ |  | 3,790 |  | 2,370
2026 | ​ |  | 2,881 |  | 2,434
2027 and thereafter | ​ |  | 17,029 |  | 18,997
Total minimum lease payments | ​ | ​ | 34,785 |  | 28,372
Less: amounts representing interest | ​ |  | 4,760 |  | 7,189
Present value of net minimum lease payments | ​ | $ | 30,025 |  | 21,183
Less: current portion of lease obligations | ​ |  | 5,172 |  | 1,331
Non-current portion of lease obligations | ​ |  | 24,853 |  | 19,852
​ | ​ | ​ | ​ | ​ | ​
ROU assets | ​ | $ | 29,150 | ​ | 17,343
​

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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