XML 77 R60.htm IDEA: XBRL DOCUMENT
v3.20.4

Loans and Allowance for Credit Losses on Loans - Aging Analysis (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($)
Aged analysis of past due loans |  |
Current | $ 2,011,903 |
Nonaccrual | 22,280 | $ 15,395
Total loans, excluding PCI loans | 2,034,851 | 1,922,211
Current including PCI Loans |  | 1,898,221
Non accrual including PCI Loans |  | 15,395
Total Past Due Including PCI loans | 22,948 | 17,196
Total Loans | 2,034,851 | 1,930,812
Total loans, including deferred loan loan costs and PCI | 2,000,996 | 1,911,023
Recorded Investment 90 days or Greater Past Due and Accruing | $ 434 | 2,628
Total Loans |  | 1,930,812
Number of loan modifications, CARES Act | item | 499 |
Number of loan modifications with deferral request, CARES Act | item | 51 |
Number of loan modifications resumed payments, CARES Act | item | 448 |
Pre-modification, CARES Act | $ 231,300 |
Post-modification, CARES Act | 32,700 |
Loan modification CARES Act, resumed payments | 198,600 |
30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due Including PCI loans | 10,916 | 9,379
60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 1,840 |
Total Past Due Including PCI loans |  | 5,272
90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 10,192 |
Total Past Due Including PCI loans |  | 2,545
PCI |  |
Aged analysis of past due loans |  |
Total Past Due |  | 261
Current |  | 5,377
Nonaccrual |  | 2,963
Total Loans |  | 8,601
PCI | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due |  | 261
Non-PCI |  |
Aged analysis of past due loans |  |
Total Past Due |  | 16,935
Current |  | 1,892,844
Nonaccrual | 22,280 | 12,432
Total loans, excluding PCI loans |  | 1,922,211
Total Loans |  | 1,922,211
Recorded Investment 90 days or Greater Past Due and Accruing |  | 2,628
Non-PCI | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due |  | 9,118
Non-PCI | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due |  | 5,272
Non-PCI | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due |  | 2,545
Commercial |  |
Aged analysis of past due loans |  |
Total Past Due | 52 | 4,299
Current | 407,107 | 328,399
Nonaccrual | 1,125 | 144
Total Loans | 407,159 | 332,842
Recorded Investment 90 days or Greater Past Due and Accruing |  | 2,132
Commercial | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due |  | 1,271
Commercial | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due |  | 925
Commercial | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 52 | 2,103
Leases |  |
Aged analysis of past due loans |  |
Total Past Due | 988 | 443
Current | 140,613 | 118,979
Nonaccrual | 2,638 | 329
Total Loans | 141,601 | 119,751
Recorded Investment 90 days or Greater Past Due and Accruing | 163 | 128
Leases | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 613 | 362
Leases | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 59 |
Leases | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 316 | 81
Commercial real estate - Investor |  |
Aged analysis of past due loans |  |
Total Past Due | 2,547 | 1,064
Current | 579,495 | 517,336
Nonaccrual | 1,632 | 1,695
Total Loans | 582,042 | 520,095
Recorded Investment 90 days or Greater Past Due and Accruing |  | 348
Commercial real estate - Investor | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 1,439 | 626
Commercial real estate - Investor | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due |  | 95
Commercial real estate - Investor | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 1,108 | 343
Commercial real estate - Owner occupied |  |
Aged analysis of past due loans |  |
Total Past Due | 10,115 | 3,495
Current | 322,955 | 336,829
Nonaccrual | 9,262 | 5,180
Total Loans | 333,070 | 345,504
Commercial real estate - Owner occupied | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 1,848 | 2,469
Commercial real estate - Owner occupied | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 958 | 1,026
Commercial real estate - Owner occupied | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 7,309 |
Real estate - construction |  |
Aged analysis of past due loans |  |
Total Past Due | 1,237 | 26
Current | 97,249 | 69,498
Nonaccrual |  | 93
Total Loans | 98,486 | 69,617
Real estate - construction | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 1,237 | 26
Real estate - Investor |  |
Aged analysis of past due loans |  |
Total Past Due | 1,526 | 266
Current | 54,611 | 70,051
Nonaccrual | 928 | 788
Total Loans | 56,137 | 71,105
Recorded Investment 90 days or Greater Past Due and Accruing | 157 |
Real estate - Investor | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 1,022 | 141
Real estate - Investor | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 20 | 125
Real estate - Investor | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 484 |
Real estate - Owner occupied |  |
Aged analysis of past due loans |  |
Total Past Due | 1,862 | 4,801
Current | 114,526 | 128,650
Nonaccrual | 3,206 | 2,572
Total Loans | 116,388 | 136,023
Recorded Investment 90 days or Greater Past Due and Accruing | 114 |
Real estate - Owner occupied | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 859 | 3,450
Real estate - Owner occupied | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 286 | 1,351
Real estate - Owner occupied | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 717 |
Multifamily |  |
Aged analysis of past due loans |  |
Total Past Due | 3,749 | 1,710
Current | 185,291 | 187,995
Nonaccrual | 2,437 | 68
Total Loans | 189,040 | 189,773
Multifamily | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 3,282 | 10
Multifamily | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 467 | 1,700
HELOC |  |
Aged analysis of past due loans |  |
Total Past Due | 805 | 803
Current | 80,103 | 89,438
Nonaccrual | 1,052 | 1,364
Total Loans | 80,908 | 91,605
Recorded Investment 90 days or Greater Past Due and Accruing |  | 20
HELOC | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 549 | 735
HELOC | 60 to 89 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 50 | 50
HELOC | 90 Days or Greater Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 206 | 18
HELOC - Purchased |  |
Aged analysis of past due loans |  |
Total Past Due | 47 |
Current | 19,440 | 31,672
Nonaccrual |  | 180
Total Loans | 19,487 | 31,852
HELOC - Purchased | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | 47 |
Other |  |
Aged analysis of past due loans |  |
Total Past Due | 20 | 28
Current | 10,513 | 13,997
Nonaccrual |  | 19
Total Loans | 10,533 | 14,044
Other | 30 to 59 Days Past Due |  |
Aged analysis of past due loans |  |
Total Past Due | $ 20 | 28
Other 1 |  |
Aged analysis of past due loans |  |
Nonaccrual |  | $ 19

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings due to CARES Act. + References No definition available. + Details
Name: | osbc_FinancingReceivableModificationsNumberOfContractsCaresAct
Namespace Prefix: | osbc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings due to CARES Act that have resumed payments + References No definition available. + Details
Name: | osbc_FinancingReceivableModificationsNumberOfContractsCaresActResumedPayments
Namespace Prefix: | osbc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings due to CARES Act, that had an active deferral request. + References No definition available. + Details
Name: | osbc_FinancingReceivableModificationsNumberOfContractsWithDeferralRequestDueToCaresAct
Namespace Prefix: | osbc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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, after troubled debt restructuring, of modified financing receivable related to CARES Act. + References No definition available. + Details
Name: | osbc_FinancingReceivableTroubledDebtRestructuringPostmodificationCaresAct
Namespace Prefix: | osbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified due to CARES Act. + References No definition available. + Details
Name: | osbc_FinancingReceivableTroubledDebtRestructuringPremodificationCaresAct
Namespace Prefix: | osbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified and resumed payments. + References No definition available. + Details
Name: | osbc_FinancingReceivableTroubledDebtRestructuringPremodificationResumedPayments
Namespace Prefix: | osbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, excluding PCI loans, 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 No definition available. + Details
Name: | osbc_LoansAndLeasesReceivableExcludingPCILoansNetOfDeferredIncome
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=121599337&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=121611835&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=121647567&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 not past due. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&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 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
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=121611835&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=121599337&loc=SL82919258-210447 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable past due. + References Reference 1: 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=121647567&loc=SL82922355-210448 Reference 2: 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=121599337&loc=SL82919253-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
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=121593590&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=121611835&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=121593590&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
- 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_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredAndNoCreditDeteriorationMember
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: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=osbc_Other1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |