XML 46 R34.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Fair Values of Financial Instruments (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Fair Values of Financial Instruments |
Schedule of carrying amount and estimated fair values of financial instruments |
|  | March 31, 2018
|  | Carrying |  | Fair |  |  |  |  |  |  |  |  |
|  | Amount |  | Value |  | Level 1 |  | Level 2 |  | Level 3
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | $ | 29,478 |  | $ | 29,478 |  | $ | 29,478 |  | $ | - |  | $ | -
Interest bearing deposits with financial institutions |  |  | 18,394 |  |  | 18,394 |  |  | 18,394 |  |  | - |  |  | -
Securities available-for-sale |  |  | 550,942 |  |  | 550,942 |  |  | 3,895 |  |  | 518,424 |  |  | 28,623
FHLBC and FRBC Stock |  |  | 7,468 |  |  | 7,468 |  |  | - |  |  | 7,468 |  |  | -
Loans held-for-sale |  |  | 2,426 |  |  | 2,426 |  |  | - |  |  | 2,426 |  |  | -
Loans, net |  |  | 1,583,624 |  |  | 1,556,714 |  |  | - |  |  | - |  |  | 1,556,714
Accrued interest receivable |  |  | 9,114 |  |  | 9,114 |  |  | - |  |  | 9,114 |  |  | -
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noninterest bearing deposits |  | $ | 582,766 |  | $ | 582,766 |  | $ | 582,766 |  | $ | - |  | $ | -
Interest bearing deposits |  |  | 1,379,282 |  |  | 1,372,909 |  |  | - |  |  | 1,372,909 |  |  | -
Securities sold under repurchase agreements |  |  | 41,366 |  |  | 41,366 |  |  | - |  |  | 41,366 |  |  | -
Other short-term borrowings |  |  | 45,000 |  |  | 45,000 |  |  | - |  |  | 45,000 |  |  | -
Junior subordinated debentures |  |  | 57,650 |  |  | 59,471 |  |  | 33,267 |  |  | 26,204 |  |  | -
Senior notes |  |  | 44,083 |  |  | 46,743 |  |  | - |  |  | 46,743 |  |  | -
Interest rate swap agreements |  |  | 7 |  |  | 7 |  |  | - |  |  | 7 |  |  | -
Borrowing interest payable |  |  | 792 |  |  | 792 |  |  | - |  |  | 792 |  |  | -
Deposit interest payable |  |  | 632 |  |  | 632 |  |  | - |  |  | 632 |  |  | -
|  | December 31, 2017
|  | Carrying |  | Fair |  |  |  |  |  |
|  | Amount |  | Value |  | Level 1 |  | Level 2 |  | Level 3
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | $ | 37,444 |  | $ | 37,444 |  | $ | 37,444 |  | $ | - |  | $ | -
Interest bearing deposits with financial institutions |  |  | 18,389 |  |  | 18,389 |  |  | 18,389 |  |  | - |  |  | -
Securities available-for-sale |  |  | 541,439 |  |  | 541,439 |  |  | 3,947 |  |  | 520,963 |  |  | 16,529
FHLBC and FRBC Stock |  |  | 10,168 |  |  | 10,168 |  |  | - |  |  | 10,168 |  |  | -
Loans held-for-sale |  |  | 4,067 |  |  | 4,067 |  |  | - |  |  | 4,067 |  |  | -
Loans, net |  |  | 1,600,161 |  |  | 1,586,722 |  |  | - |  |  | - |  |  | 1,586,722
Accrued interest receivable |  |  | 8,595 |  |  | 8,595 |  |  | - |  |  | 8,595 |  |  | -
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noninterest bearing deposits |  | $ | 572,404 |  | $ | 572,404 |  | $ | 572,404 |  | $ | - |  | $ | -
Interest bearing deposits |  |  | 1,350,521 |  |  | 1,346,339 |  |  | - |  |  | 1,346,339 |  |  | -
Securities sold under repurchase agreements |  |  | 29,918 |  |  | 29,918 |  |  | - |  |  | 29,918 |  |  | -
Other short-term borrowings |  |  | 115,000 |  |  | 115,000 |  |  | - |  |  | 115,000 |  |  | -
Junior subordinated debentures |  |  | 57,639 |  |  | 59,471 |  |  | 33,267 |  |  | 26,204 |  |  | -
Subordinated debenture |  |  | 44,058 |  |  | 46,743 |  |  | - |  |  | 46,743 |  |  | -
Interest rate swap agreements |  |  | 1,287 |  |  | 1,287 |  |  | - |  |  | 1,287 |  |  | -
Borrowing interest payable |  |  | 140 |  |  | 140 |  |  | - |  |  | 140 |  |  | -
Deposit interest payable |  |  | 631 |  |  | 631 |  |  | - |  |  | 631 |  |  | -

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

X
- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
Name: | us-gaap_FairValueByBalanceSheetGroupingTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration