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Securities | 6 Months Ended
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Dec. 31, 2020
Securities |
Securities | Note 3: Securities The amortized cost, gross unrealized gains, gross unrealized losses, ACL, and approximate fair value of securities available for sale consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | ​ | ​ |  | Gross |  | Gross |  | Allowance | ​ | Estimated
​ |  | Amortized |  | Unrealized |  | Unrealized |  | for |  | Fair
(dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Credit Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investment and mortgage backed securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
State and political subdivisions | ​ | $ | 46,785 | ​ | $ | 1,689 | ​ | $ | — | ​ | $ | — | ​ | $ | 48,474
Other securities | ​ |  | 15,376 | ​ |  | 267 | ​ |  | (334) | ​ |  | — | ​ |  | 15,309
Mortgage-backed GSE residential | ​ |  | 113,553 | ​ |  | 3,868 | ​ |  | (58) | ​ |  | — | ​ |  | 117,363
Total investments and mortgage-backed securities | ​ | $ | 175,714 | ​ | $ | 5,824 | ​ | $ | (392) | ​ | $ | — | ​ | $ | 181,146
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2020
​ |  | ​ | ​ |  | Gross |  | Gross | ​ | Estimated
​ |  | Amortized |  | Unrealized |  | Unrealized |  | Fair
(dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investment and mortgage backed securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
State and political subdivisions | ​ | $ | 40,486 | ​ | $ | 1,502 | ​ | $ | — | ​ | $ | 41,988
Other securities | ​ |  | 7,919 | ​ |  | 48 | ​ |  | (343) | ​ |  | 7,624
Mortgage-backed GSE residential | ​ |  | 122,375 | ​ |  | 4,576 | ​ |  | (39) | ​ |  | 126,912
Total investment and mortgage-backed securities | ​ | $ | 170,780 | ​ | $ | 6,126 | ​ | $ | (382) | ​ | $ | 176,524
​ The amortized cost and estimated fair value of investment and mortgage-backed securities, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Amortized |  | Estimated
(dollars in thousands) |  | Cost |  | Fair Value
Within one year | ​ | $ | 1,347 | ​ | $ | 1,367
After one year but less than five years | ​ |  | 11,055 | ​ |  | 11,230
After five years but less than ten years | ​ |  | 23,718 | ​ |  | 24,326
After ten years | ​ |  | 26,041 | ​ |  | 26,860
Total investment securities | ​ |  | 62,161 | ​ |  | 63,783
Mortgage-backed securities | ​ |  | 113,553 | ​ |  | 117,363
Total investment and mortgage-backed securities | ​ | $ | 175,714 | ​ | $ | 181,146
​ The carrying value of investment and mortgage-backed securities pledged as collateral to secure public deposits amounted to $150.3 million at December 31, 2020 and $156.1 million at June 30, 2020. The securities pledged consist of marketable securities, including $85.5 million and $82.0 million of Mortgage-Backed Securities, $28.9 million and $41.9 million of Collateralized Mortgage Obligations, $34.9 million and $32.0 million of State and Political Subdivisions Obligations, and $1.0 million and $200,000 of Other Securities at December 31 and June 30, 2020, respectively. The following tables show the Company’s investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position for which an ACL has not been recorded at December 31 and June 30, 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Less than 12 months |  | 12 months or more |  | Total
​ |  | ​ | ​ | ​ | Unrealized |  | ​ | ​ | ​ | Unrealized |  | ​ | ​ | ​ | Unrealized
(dollars in thousands) |  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other securities | ​ | $ | 2,023 | ​ | $ | 36 | ​ | $ | 771 | ​ | $ | 298 | ​ | $ | 2,794 | ​ | $ | 334
Mortgage-backed securities | ​ |  | 11,656 | ​ |  | 58 | ​ |  | — | ​ |  | — | ​ |  | 11,656 | ​ |  | 58
Total investment and mortgage-backed securities | ​ | $ | 13,679 | ​ | $ | 94 | ​ | $ | 771 | ​ | $ | 298 | ​ | $ | 14,450 | ​ | $ | 392
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2020
​ |  | Less than 12 months |  | 12 months or more |  | Total
​ |  | ​ | ​ | ​ | Unrealized |  | ​ | ​ | ​ | Unrealized |  | ​ | ​ | ​ | Unrealized
(dollars in thousands) |  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other securities | ​ | $ | 995 | ​ | $ | 5 | ​ | $ | 643 | ​ | $ | 338 | ​ | $ | 1,638 | ​ | $ | 343
Mortgage-backed securities | ​ |  | 9,037 | ​ |  | 39 | ​ |  | — | ​ |  | — | ​ |  | 9,037 | ​ |  | 39
Total investments and mortgage-backed securities | ​ | $ | 10,032 | ​ | $ | 44 | ​ | $ | 643 | ​ | $ | 338 | ​ | $ | 10,675 | ​ | $ | 382
​ Mortgage-backed securities. The unrealized losses on the Company’s investments in mortgage-backed securities were caused by variations in market interest rates since purchase or acquisition. The securities are of high credit quality (AA or higher). Because the Company does not intend to sell these securities and it likely that the Company will not be required to sell these securities prior to recovery of their amortized cost basis, which may be maturity, the Company has not recorded an ACL on these securities. Other securities. At December 31, 2020 there were two pooled trust preferred securities with an estimated fair value of $680,000 and unrealized losses of $296,000 in a continuous unrealized loss position for twelve months or more. These unrealized losses were primarily due to the long-term nature of the pooled trust preferred securities and a reduced demand for these securities, and concerns regarding the financial institutions that issued the underlying trust preferred securities. The December 31, 2020, cash flow analysis for these two securities indicated it is probable the Company will receive all contracted principal and related interest projected. The cash flow analysis used in making this determination was based on anticipated default, recovery, and prepayment rates, and the resulting cash flows were discounted based on the yield spread anticipated at the time the securities were purchased. Other inputs include the actual collateral attributes, which include credit ratings and other performance indicators of the underlying financial institutions, including profitability, capital ratios, and asset quality. Assumptions for these two securities included prepayments averaging 1.6 percent, annually, annual defaults averaging 50 basis points, and a recovery rate averaging 10 percent of gross defaults, lagged two years. One of these two securities has continued to receive cash interest payments in full since the Company’s purchase; the other security received principal-in-kind (PIK), in lieu of cash interest, for a period of time following the recession and financial crisis which began in 2008, but resumed cash interest payments during fiscal 2014. The Company's cash flow analysis indicates that cash interest payments are expected to continue for both securities. Because the Company does not intend to sell these securities and it is likely that the Company will not be required to sell these securities prior to recovery of their amortized cost basis, which may be maturity, the Company has not recorded an ACL on these securities. The Company does not believe any other individual unrealized loss as of December 31, 2020, is the result of a credit loss. However, the Company could be required to recognize an ACL in future periods with respect to its available for sale investment securities portfolio. Credit losses recognized on investments. During fiscal 2009, the Company adopted ASC 820, formerly FASB Staff Position 157-4, “Determining Fair Value When the Volume and Level of Activity for the Asset or Liability Have Significantly Decreased and Identifying Transactions That Are Not Orderly.” There were no credit losses recognized in income and other losses or recorded in other comprehensive income for the three- and six- month periods ended December 31, 2020 and 2019.

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