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v3.22.1

Other Real Estate Owned (Tables) | 3 Months Ended
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Mar. 31, 2022
Other Real Estate Owned |
Schedule of activity in the other real estate owned (OREO) portfolio, net of valuation reserve | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​
​ |  | March 31, |
Other real estate owned |  | 2022 |  | 2021 |
Balance at beginning of period | ​ | $ | 2,356 | ​ | $ | 2,474 | ​
Property additions, net of acquisition adjustments | ​ | ​ | 87 | ​ | ​ | - | ​
Less: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from property disposals, net of participation purchase and of gains/losses | ​ | ​ | 69 | ​ | ​ | 305 | ​
Period valuation write-down | ​ | ​ | - | ​ | ​ | 6 | ​
Balance at end of period | ​ | $ | 2,374 | ​ | $ | 2,163 | ​
Schedule of activity in valuation allowance | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​
​ |  | March 31, |
​ |  | 2022 |  | 2021 |
Balance at beginning of period | ​ | $ | 1,179 | ​ | $ | 1,643 | ​
Provision for unrealized losses | ​ | ​ | - | ​ | ​ | 6 | ​
Balance at end of period | ​ | $ | 1,179 | ​ | $ | 1,649 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of expenses related to foreclosed assets, net of lease revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​
​ | ​ | March 31, |
​ |  | 2022 |  | 2021 |
Gain on sales, net | ​ | $ | (49) | ​ | $ | (20) | ​
Provision for unrealized losses | ​ | ​ | - | ​ | ​ | 6 | ​
Operating expenses | ​ | ​ | 37 | ​ | ​ | 54 | ​
Less: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Lease revenue | ​ | ​ | - | ​ | ​ | 4 | ​
Net OREO (gain) expense | ​ | $ | (12) | ​ | $ | 36 | ​

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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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Balance Type: | na
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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
Balance Type: | na
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration