XML 54 R38.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Deposits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Deposits |
Schedule of major classifications of deposits |
|  | 2016 |  | 2015 |
Noninterest bearing demand |  | $ | 513,688 |  | $ | 442,639 |
Savings |  |  | 256,159 |  |  | 252,169 |
NOW accounts |  |  | 419,417 |  |  | 376,720 |
Money market accounts |  |  | 275,273 |  |  | 279,709 |
Certificates of deposit of less than $100,000 |  |  | 228,993 |  |  | 235,336 |
Certificates of deposit of $100,000 through $250,000 |  |  | 110,992 |  |  | 109,855 |
Certificates of deposit of more than $250,000 |  |  | 62,263 |  |  | 62,658 |
Total deposits |  | $ | 1,866,785 |  | $ | 1,759,086 |
Summary of scheduled maturities of time deposits |
2017 |  | $ | 208,154 |
2018 |  |  | 77,036 |
2019 |  |  | 49,690 |
2020 |  |  | 49,332 |
2021 |  |  | 18,036 |
Total time deposits |  | $ | 402,248 |

X
- Definition Tabular disclosure of different types of deposits liabilities held by the entity. + References No definition available. + Details
Name: | osbc_ScheduleOfDepositsTableTextBlock
Namespace Prefix: | osbc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the aggregate amount of maturities for time deposits for each of the five years following the date of the latest fiscal year presented. + References No definition available. + Details
Name: | osbc_ScheduleOfMaturitiesOfTimeDepositTableTextBlock
Namespace Prefix: | osbc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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