XML 58 R47.htm IDEA: XBRL DOCUMENT
v3.22.1

Loans and Allowance for Credit Losses on Loans - Aging Analysis (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Aged analysis of past due loans |  |
Non accrual including PCI Loans | $ 35,973 | $ 41,531
Total Loans | 3,402,370 | 3,421,948
Total loans, including deferred loan loan costs and PCI | 3,358,062 | 3,377,667
Recorded Investment 90 days or Greater Past Due and Accruing | 743 |
Total Loans |  | 3,110
Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 113,708 | 48,236
Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 38,317 |
Total Past Due Including PCI loans |  | 27,342
30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 21,079 |
Total Past Due Including PCI loans |  | 9,342
60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 839 |
Total Past Due Including PCI loans |  | 4,356
90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 16,399 |
Total Past Due Including PCI loans |  | 13,644
Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 3,364,053 |
Current including PCI Loans |  | 3,394,606
Commercial |  |
Aged analysis of past due loans |  |
Nonaccrual | 9,029 | 11,894
Total Loans | 695,545 | 771,474
Recorded Investment 90 days or Greater Past Due and Accruing |  | 1,396
Commercial | Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 4,971 | 4,530
Commercial | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 12,576 | 6,648
Commercial | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 4,904 | 3,407
Commercial | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 548 | 1,413
Commercial | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 7,124 | 1,828
Commercial | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 682,969 | 764,826
Leases |  |
Aged analysis of past due loans |  |
Nonaccrual | 2,641 | 3,754
Total Loans | 211,132 | 176,031
Leases | Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 303 |
Leases | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 1,937 | 1,696
Leases | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 401 | 125
Leases | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 1,536 | 1,571
Leases | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 209,195 | 174,335
Commercial real estate - Investor |  |
Aged analysis of past due loans |  |
Nonaccrual | 6,335 | 5,694
Total Loans | 965,767 | 957,389
Commercial real estate - Investor | Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 66,015 | 26,016
Commercial real estate - Investor | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 3,400 | 1,374
Commercial real estate - Investor | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 3,399 |
Commercial real estate - Investor | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current |  | 267
Commercial real estate - Investor | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 1 | 1,107
Commercial real estate - Investor | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 962,367 | 956,015
Commercial real estate - Owner occupied |  |
Aged analysis of past due loans |  |
Nonaccrual | 9,871 | 11,637
Total Loans | 655,792 | 574,384
Recorded Investment 90 days or Greater Past Due and Accruing |  | 1,594
Commercial real estate - Owner occupied | Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 18,277 | 2,953
Commercial real estate - Owner occupied | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 12,820 | 7,672
Commercial real estate - Owner occupied | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 9,764 | 2,324
Commercial real estate - Owner occupied | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 100 | 500
Commercial real estate - Owner occupied | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 2,956 | 4,848
Commercial real estate - Owner occupied | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 642,972 | 566,712
Real estate - construction |  |
Aged analysis of past due loans |  |
Nonaccrual | 155 | 160
Total Loans | 165,558 | 206,132
Recorded Investment 90 days or Greater Past Due and Accruing | 7 |
Real estate - construction | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 124 | 854
Real estate - construction | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 117 | 854
Real estate - construction | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 7 |
Real estate - construction | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 165,434 | 205,278
Residential real estate - Investor |  |
Aged analysis of past due loans |  |
Nonaccrual | 1,391 | 876
Total Loans | 62,846 | 63,399
Recorded Investment 90 days or Greater Past Due and Accruing | 2 | 23
Residential real estate - Investor | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 1,270 | 1,657
Residential real estate - Investor | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 269 | 395
Residential real estate - Investor | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current |  | 470
Residential real estate - Investor | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 1,001 | 792
Residential real estate - Investor | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 61,576 | 61,742
Residential real estate - Owner occupied |  |
Aged analysis of past due loans |  |
Nonaccrual | 4,321 | 4,898
Total Loans | 203,118 | 213,248
Recorded Investment 90 days or Greater Past Due and Accruing | 20 | 97
Residential real estate - Owner occupied | Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 638 | 659
Residential real estate - Owner occupied | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 4,492 | 5,662
Residential real estate - Owner occupied | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 1,805 | 1,994
Residential real estate - Owner occupied | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 98 | 591
Residential real estate - Owner occupied | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 2,589 | 3,077
Residential real estate - Owner occupied | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 198,626 | 207,586
Multifamily |  |
Aged analysis of past due loans |  |
Nonaccrual | 938 | 1,573
Total Loans | 298,686 | 309,164
Recorded Investment 90 days or Greater Past Due and Accruing | 691 |
Multifamily | Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 6,891 | 6,900
Multifamily | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 691 | 1,046
Multifamily | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current |  | 1,046
Multifamily | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 691 |
Multifamily | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 297,995 | 308,118
HELOC |  |
Aged analysis of past due loans |  |
Nonaccrual | 1,116 | 862
Total Loans | 110,688 | 115,664
Recorded Investment 90 days or Greater Past Due and Accruing | 23 |
HELOC | Special Mention [Member] |  |
Aged analysis of past due loans |  |
Total Loans | 108 | 108
HELOC | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 766 | 434
HELOC | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 354 | 193
HELOC | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 93 | 23
HELOC | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 319 | 218
HELOC | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 109,922 | 115,230
HELOC - Purchased |  |
Aged analysis of past due loans |  |
Nonaccrual | 173 | 180
Total Loans | 9,553 | 10,626
HELOC - Purchased | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 173 | 180
HELOC - Purchased | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 173 | 180
HELOC - Purchased | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 9,380 | 10,446
Other |  |
Aged analysis of past due loans |  |
Nonaccrual | 3 | 3
Total Loans | 23,685 | 24,437
Other | Financial Asset, Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | 68 | 119
Other | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Current | 66 | 50
Other | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Current |  | 46
Other | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Current | 2 | 23
Other | Financial Asset, Not Past Due [Member] |  |
Aged analysis of past due loans |  |
Current | $ 23,617 | $ 24,318

X
- Definition Amount of financing receivable on nonaccrual status including purchased credit impaired loans. + References No definition available. + Details
Name: | osbc_FinancingReceivableNonaccrualIncludingPurchasedCreditImpairedLoans
Namespace Prefix: | osbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable not past due including purchased credit impaired loans. + References No definition available. + Details
Name: | osbc_FinancingReceivableNotPastDueIncludingPurchasedCreditImpairedLoans
Namespace Prefix: | osbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable past due including purchased credit impaired loans. + References No definition available. + Details
Name: | osbc_FinancingReceivablePastDueIncludingPurchasedCreditImpairedLoans
Namespace Prefix: | osbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans and purchased credit impaired loans. Excludes loans and leases covered under loss sharing agreements. + References No definition available. + Details
Name: | osbc_LoansAndLeasesReceivableIncludingPurchasedCreditImpairedLoansNetOfDeferredIncome
Namespace Prefix: | osbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable on nonaccrual status. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetReportedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=osbc_CommercialRealEstateInvestorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=osbc_CommercialRealEstateOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=osbc_RealEstateInvestorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=osbc_RealEstateOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=osbc_MultiFamilyLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=osbc_HelocPurchasedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_UnallocatedFinancingReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |