Investment Securities (Tables)
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12 Months Ended |
Sep. 30, 2018 |
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| Investments, Debt and Equity Securities [Abstract] |
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| Summary of amortized cost, estimated fair value and related unrealized gains and losses on securities available for sale |
The amortized cost, estimated fair value and related unrealized gains and losses on securities available for sale and held to maturity as of September 30, 2018 and September 30, 2017, respectively, were as follows: | | | | | | | | | | | | | | | | | Available for sale securities | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Estimated Fair Value | September 30, 2018 | | | | | | | | U.S. government agency obligations | $ | 35,880 |
| | $ | 3 |
| | $ | 1,280 |
| | $ | 34,603 |
| Obligations of states and political subdivisions | 35,348 |
| | 2 |
| | 796 |
| | 34,554 |
| Mortgage-backed securities | 42,796 |
| | 26 |
| | 1,451 |
| | 41,371 |
| Agency securities | 104 |
| | 78 |
| | — |
| | 182 |
| Corporate debt securities | 6,593 |
| | — |
| | 317 |
| | 6,276 |
| Corporate asset based securities | 1,494 |
| | 2 |
| | — |
| | 1,496 |
| Total available for sale securities | $ | 122,215 |
| | $ | 111 |
| | $ | 3,844 |
| | $ | 118,482 |
| | | | | | | | | September 30, 2017 | | | | | | | | U.S. government agency obligations | $ | 18,454 |
| | $ | 35 |
| | $ | 448 |
| | $ | 18,041 |
| Obligations of states and political subdivisions | 35,656 |
| | 270 |
| | 131 |
| | 35,795 |
| Mortgage-backed securities | 36,661 |
| | 124 |
| | 311 |
| | 36,474 |
| Agency Securities | 147 |
| | 83 |
| | — |
| | 230 |
| Corporate debt securities | 5,410 |
| | — |
| | 67 |
| | 5,343 |
| Total available for sale securities | $ | 96,328 |
| | $ | 512 |
| | $ | 957 |
| | $ | 95,883 |
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| Summary of amortized cost, estimated fair value and related unrealized gains and losses on securities held to maturity |
| | | | | | | | | | | | | | | | | Held to maturity securities | Amortized
Cost | | Gross
Unrealized
Gains | | Gross
Unrealized
Losses | | Estimated
Fair Value | September 30, 2018 | | | | | | | | Obligations of states and political subdivisions | $ | 1,307 |
| | $ | — |
| | $ | 5 |
| | $ | 1,302 |
| Mortgage-backed securities | 3,312 |
| | 36 |
| | 41 |
| | 3,307 |
| Total held to maturity securities | $ | 4,619 |
| | $ | 36 |
| | $ | 46 |
| | $ | 4,609 |
| September 30, 2017 | | | | | | | | Obligations of states and political subdivisions | $ | 1,311 |
| | $ | 17 |
| | $ | — |
| | $ | 1,328 |
| Mortgage-backed securities | 4,142 |
| | 136 |
| | 1 |
| | 4,277 |
| Total held to maturity securities | $ | 5,453 |
| | $ | 153 |
| | $ | 1 |
| | $ | 5,605 |
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| The estimated fair value of securities by contractual maturity |
The estimated fair value of available for sale securities at September 30, 2018, by contractual maturity, is shown below. Expected maturities will differ from contractual maturities on mortgage-backed securities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Expected maturities may differ from contractual maturities on certain agency and municipal securities due to the call feature. | | | | | | | | | | Available for sale securities | | Amortized Cost | | Estimated Fair Value | Due in one year or less | | $ | 1,657 |
| | $ | 1,651 |
| Due after one year through five years | | 20,045 |
| | 19,739 |
| Due after five years through ten years | | 39,069 |
| | 37,578 |
| Due after ten years | | 18,544 |
| | 17,960 |
| Total securities with contractual maturities | | 79,315 |
| | 76,928 |
| Mortgage backed securities | | 42,796 |
| | 41,372 |
| Securities without contractual maturities | | 104 |
| | 182 |
| Total available for sale securities | | $ | 122,215 |
| | $ | 118,482 |
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| | | | | | | | | | Held to maturity securities | | Amortized Cost | | Estimated Fair Value | Due after one year through five years | | $ | 1,307 |
| | $ | 1,302 |
| Mortgage backed securities | | 3,312 |
| | 3,307 |
| Total held to maturity securities | | $ | 4,619 |
| | $ | 4,609 |
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| Available for sale securities with unrealized losses |
Securities with unrealized losses at September 30, 2018 and 2017, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | Less than 12 Months | | 12 Months or More | | Total | Available for sale securities | | Fair Value | | Unrealized Loss | | Fair Value | | Unrealized Loss | | Fair Value | | Unrealized Loss | 2018 | | | | | | | | | | | | | U.S. government agency obligations | | $ | 22,283 |
| | $ | 311 |
| | $ | 11,771 |
| | $ | 969 |
| | $ | 34,054 |
| | $ | 1,280 |
| Obligations of states and political subdivisions | | 25,019 |
| | 393 |
| | 8,647 |
| | 403 |
| | 33,666 |
| | 796 |
| Mortgage-backed securities | | 18,323 |
| | 418 |
| | 20,968 |
| | 1,033 |
| | 39,291 |
| | 1,451 |
| Agency securities | | 1,247 |
| | 3 |
| | 5,029 |
| | 314 |
| | 6,276 |
| | 317 |
| Total | | $ | 66,872 |
| | $ | 1,125 |
| | $ | 46,415 |
| | $ | 2,719 |
| | $ | 113,287 |
| | $ | 3,844 |
| 2017 | | | | | | | | | | | | | U.S. government agency obligations | | $ | 8,296 |
| | $ | 186 |
| | $ | 6,932 |
| | $ | 262 |
| | $ | 15,228 |
| | $ | 448 |
| Obligations of states and political subdivisions | | 8,170 |
| | 62 |
| | 3,701 |
| | 70 |
| | 11,871 |
| | 132 |
| Mortgage-backed securities | | 14,167 |
| | 96 |
| | 9,753 |
| | 215 |
| | 23,920 |
| | 311 |
| Corporate debt securities | | 5,343 |
| | 67 |
| | — |
| | — |
| | 5,343 |
| | 67 |
| Total | | $ | 35,976 |
| | $ | 411 |
| | $ | 20,386 |
| | $ | 547 |
| | $ | 56,362 |
| | $ | 958 |
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| Held to maturity securities with unrealized losses |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Less than 12 Months | | 12 Months or More | | Total | Held to maturity securities | | Fair Value | | Unrealized Loss | | Fair Value | | Unrealized Loss | | Fair Value | | Unrealized Loss | 2018 | | | | | | | | | | | | | Obligations of states and political subdivisions | | $ | 1,302 |
| | $ | 5 |
| | $ | — |
| | $ | — |
| | $ | 1,302 |
| | $ | 5 |
| Mortgage-backed securities | | 2,383 |
| | 28 |
| | 286 |
| | 13 |
| | 2,669 |
| | 41 |
| Total | | $ | 3,685 |
| | $ | 33 |
| | $ | 286 |
| | $ | 13 |
| | $ | 3,971 |
| | $ | 46 |
| 2017 | | | | | | | | | | | | | Obligations of states and political subdivisions | | $ | — |
| | $ | — |
| | $ | — |
| | $ | — |
| | $ | — |
| | $ | — |
| Mortgage-backed securities | | 406 |
| | 1 |
| | — |
| | — |
| | 406 |
| | 1 |
| Total | | $ | 406 |
| | $ | 1 |
| | $ | — |
| | $ | — |
| | $ | 406 |
| | $ | 1 |
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