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Loans Receivable - Loan Modifications (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) contract | Jun. 30, 2015 USD ($) contract | Jun. 30, 2016 USD ($) contract | Jun. 30, 2015 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts (in contracts) | contract | 7 | 11 | 21 | 26
Recorded investment | $ | $ 2,227 | $ 1,895 | $ 4,211 | $ 4,320
Single-family residential |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts (in contracts) | contract | 3 | 9 | 14 | 19
Recorded investment | $ | $ 1,570 | $ 1,594 | $ 3,108 | $ 3,329
Construction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts (in contracts) | contract | 1 | 0 | 1 | 0
Recorded investment | $ | $ 279 | $ 0 | $ 279 | $ 0
Land - consumer lot loans |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts (in contracts) | contract | 2 | 2 | 4 | 7
Recorded investment | $ | $ 204 | $ 301 | $ 498 | $ 991
Commercial real estate |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts (in contracts) | contract | 1 | 0 | 2 | 0
Recorded investment | $ | $ 174 | $ 0 | $ 326 | $ 0

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