XML 59 R42.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Mortgage Banking (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Mortgage Banking [Abstract] |
Schedule of Mortgage Banking Operations | The following table presents the Company’s revenue from mortgage banking operations:
(Dollars in thousands) |  |  |  | Year Ended December 31, |  |  |
Mortgage banking revenue |  |  |  |  |  |  |  |  | 2024 |  | 2023 |  | 2022 |  |  |
Origination |  |  |  |  |  |  |  |  | $ | 528 |  |  | $ | 483 |  |  | $ | 774 |  |  |  |
Gain on sale of loans held for sale |  |  |  |  |  |  |  |  | 4,928 |  |  | 3,111 |  |  | 4,889 |  |  |  |
Originations of MSR |  |  |  |  |  |  |  |  | — |  |  | 708 |  |  | 2,286 |  |  |  |
Servicing |  |  |  |  |  |  |  |  | 744 |  |  | 3,739 |  |  | 5,643 |  |  |  |
Total gross mortgage revenue |  |  |  |  |  |  |  |  | 6,200 |  |  | 8,041 |  |  | 13,592 |  |  |  |
MSR asset valuation adjustments, net |  |  |  |  |  |  |  |  | 450 |  |  | (4,089) |  |  | 1,219 |  |  |  |
Gain on sale of MSR asset |  |  |  |  |  |  |  |  | 410 |  |  | — |  |  | — |  |  |  |
Mortgage HFS and pipeline fair value adjustment |  |  |  |  |  |  |  |  | (1) |  |  | (53) |  |  | (1,352) |  |  |  |
MSR asset hedge impact |  |  |  |  |  |  |  |  | (479) |  |  | (543) |  |  | (6,737) |  |  |  |
Mortgage banking revenue |  |  |  |  |  |  |  |  | $ | 6,580 |  |  | $ | 3,356 |  |  | $ | 6,722 |  |  |  |
Schedule of Activity in Mortgages Servicing Rights (MSRs) | Activity in the MSR asset was as follows:
|  |  | Years Ended December 31,
(Dollars in thousands) |  |  |  |  | 2024 |  | 2023 |  | 2022
Balance at beginning of year |  |  |  |  | $ | 15,637 |  |  | $ | 20,824 |  |  | $ | 16,220 |
Servicing acquired in BTH merger |  |  |  |  | — |  |  | — |  |  | 1,099 |
Addition of servicing rights |  |  |  |  | — |  |  | 708 |  |  | 2,286 |
Settlement of sale of MSR asset |  |  |  |  | (16,087) |  |  | (1,806) |  |  | — |
Valuation adjustment, net of amortization |  |  |  |  | 450 |  |  | (4,089) |  |  | 1,219 |
Balance at end of year |  |  |  |  | $ | — |  |  | $ | 15,637 |  |  | $ | 20,824 |

X
- Definition Mortgage Banking Operations [Table Text Block] + References No definition available. + Details
Name: | obnk_MortgageBankingOperationsTableTextBlock
Namespace Prefix: | obnk_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_MortgageBankingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the activity in the balance of servicing assets (including a description of where changes in fair value are reported in the statement of income for each period for which results of operations are presented), including but not limited to, the following: beginning and ending balances, additions (for instance, through purchases of servicing assets), disposals, changes in fair value during the period resulting from changes in inputs or assumptions used in the valuation model, other changes in fair value along with a description of those changes, and other changes that affect the balance along with a description of those changes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481229/860-50-50-3 + Details
Name: | us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration