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Other Real Estate Owned (Tables) | 9 Months Ended
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Sep. 30, 2024
Other Real Estate Owned |
Schedule of activity in the other real estate owned (OREO) portfolio, net of valuation reserve | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ |  | September 30, |  | September 30,
Other real estate owned |  | 2024 |  | 2023 |  | 2024 |  | 2023 | ​
Balance at beginning of period | ​ | $ | 6,920 | ​ | $ | 761 | ​ | $ | 5,123 | ​ | $ | 1,561 | ​
Property additions, net of acquisition adjustments | ​ | ​ | 1,282 | ​ | ​ | 210 | ​ | ​ | 4,670 | ​ | ​ | 686 | ​
Less: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from property disposals, net of participation purchase and gains/losses | ​ | ​ | - | ​ | ​ | 564 | ​ | ​ | 1,591 | ​ | ​ | 1,571 | ​
Period valuation write-down | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 269 | ​
Balance at end of period | ​ | $ | 8,202 | ​ | $ | 407 | ​ | $ | 8,202 | ​ | $ | 407 | ​
Schedule of activity in valuation allowance | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Nine Months Ended
​ |  | September 30, |  | September 30,
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023 |
Balance at beginning of period | ​ | $ | 118 | ​ | $ | 114 | ​ | $ | 118 | ​ | $ | 856 | ​
Provision for unrealized losses | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 269 | ​
Reductions taken on sales | ​ | ​ | - | ​ | ​ | 4 | ​ | ​ | - | ​ | ​ | (1,007) | ​
Balance at end of period | ​ | $ | 118 | ​ | $ | 118 | ​ | $ | 118 | ​ | $ | 118 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of expenses related to foreclosed assets, net of lease revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, |  | September 30,
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023 | ​
Gain on sales, net | ​ | $ | - | ​ | $ | (71) | ​ | $ | (259) | ​ | $ | (229) | ​
Provision for unrealized losses | ​ | ​ | - | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 269 | ​
Operating expenses | ​ | ​ | 321 | ​ | ​ | 44 | ​ | ​ | 673 | ​ | ​ | 145 | ​
Less: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Lease revenue | ​ | ​ | 79 | ​ | ​ | - | ​ | ​ | 213 | ​ | ​ | 4 | ​
Net OREO expense | ​ | $ | 242 | ​ | $ | (27) | ​ | $ | 201 | ​ | $ | 181 | ​
​

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- Definition Tabular disclosure of expenses related to foreclosed assets, net of lease revenue. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings. + References No definition available. + Details
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- Definition Tabular disclosure of the change in valuation allowance of other real estate on properties acquired through foreclosure. + References No definition available. + Details
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- Definition Tabular disclosure of the change in other real estate on properties acquired through foreclosure. + References No definition available. + Details
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Namespace Prefix: | osbc_
Data Type: | dtr-types:textBlockItemType
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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