XML 63 R47.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Fair Value Measurements (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Fair Value Measurements |
Schedule of balance of assets and liabilities which are measured at fair value on a recurring basis |
|  | December 31, 2018
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury |  | $ | 3,923 |  | $ | - |  | $ | - |  | $ | 3,923
U.S. government agencies |  |  | - |  |  | 10,951 |  |  | - |  |  | 10,951
U.S. government agencies mortgage-backed |  |  | - |  |  | 14,075 |  |  | - |  |  | 14,075
States and political subdivisions |  |  | - |  |  | 265,902 |  |  | 8,165 |  |  | 274,067
Collateralized mortgage obligations |  |  | - |  |  | 64,429 |  |  | - |  |  | 64,429
Asset-backed securities |  |  | - |  |  | 109,514 |  |  | - |  |  | 109,514
Collateralized loan obligations |  |  | - |  |  | 64,289 |  |  | - |  |  | 64,289
Loans held-for-sale |  |  | - |  |  | 2,984 |  |  | - |  |  | 2,984
Mortgage servicing rights |  |  | - |  |  | - |  |  | 7,357 |  |  | 7,357
Interest rate swap agreements |  |  | - |  |  | 672 |  |  | - |  |  | 672
Mortgage banking derivatives |  |  | - |  |  | 159 |  |  | - |  |  | 159
Total |  | $ | 3,923 |  | $ | 532,975 |  | $ | 15,522 |  | $ | 552,420
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap agreements |  | $ | - |  | $ | 672 |  | $ | - |  | $ | 672
Total |  | $ | - |  | $ | 672 |  | $ | - |  | $ | 672
|  | December 31, 2017
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury |  | $ | 3,947 |  | $ | - |  | $ | - |  | $ | 3,947
U.S. government agencies |  |  | - |  |  | 13,061 |  |  | - |  |  | 13,061
U.S. government agencies mortgage-backed |  |  | - |  |  | 12,214 |  |  | - |  |  | 12,214
States and political subdivisions |  |  | - |  |  | 263,831 |  |  | 14,261 |  |  | 278,092
Corporate bonds |  |  | - |  |  | 833 |  |  | - |  |  | 833
Collateralized mortgage obligations |  |  | - |  |  | 63,671 |  |  | 2,268 |  |  | 65,939
Asset-backed securities |  |  | - |  |  | 112,932 |  |  | - |  |  | 112,932
Collateralized loan obligations |  |  | - |  |  | 54,421 |  |  | - |  |  | 54,421
Loans held-for-sale |  |  | - |  |  | 4,067 |  |  | - |  |  | 4,067
Mortgage servicing rights |  |  | - |  |  | - |  |  | 6,944 |  |  | 6,944
Interest rate swap agreements |  |  | - |  |  | 727 |  |  | - |  |  | 727
Mortgage banking derivatives |  |  | - |  |  | 238 |  |  | - |  |  | 238
Total |  | $ | 3,947 |  | $ | 525,995 |  | $ | 23,473 |  | $ | 553,415
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap agreements |  | $ | - |  | $ | 2,014 |  | $ | - |  | $ | 2,014
Total |  | $ | - |  | $ | 2,014 |  | $ | - |  | $ | 2,014
Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis |
|  | Years Ended December 31, 2018
|  | Securities available-for-sale |  |  |
|  | Collateralized |  | States and |  | Mortgage
|  | Mortgage |  | Political |  | Servicing
|  | Obligation |  | Subdivisions |  | Rights
Beginning balance January 1, 2018 |  | $ | 2,268 |  | $ | 14,261 |  | $ | 6,944
Transfers into Level 3 |  |  | - |  |  | - |  |  | -
Transfers out of Level 3 |  |  | (1,308) |  |  | - |  |  | -
Total gains or losses |  |  |  |  |  |  |  |  |
Included in earnings |  |  | 35 |  |  | - |  |  | (181)
Included in other comprehensive income |  |  | 40 |  |  | (746) |  |  | -
Purchases, issuances, sales, and settlements |  |  |  |  |  |  |  |  |
Purchases |  |  | - |  |  | 22,046 |  |  | -
Issuances |  |  | - |  |  | - |  |  | 1,146
Settlements |  |  | (1,035) |  |  | (27,396) |  |  | (552)
Ending balance December 31, 2018 |  | $ | - |  | $ | 8,165 |  | $ | 7,357
|  | Years Ended December 31, 2017
|  | Securities available-for-sale |  |  |
|  | Collateralized |  | States and |  | Mortgage
|  | Mortgage |  | Political |  | Servicing
|  | Obligation |  | Subdivisions |  | Rights
Beginning balance January 1, 2017 |  | $ | 3,119 |  | $ | 22,226 |  | $ | 6,489
Transfers into Level 3 |  |  | - |  |  | - |  |  | -
Transfers out of Level 3 |  |  | - |  |  | - |  |  | -
Total gains or losses |  |  |  |  |  |  |  |  |
Included in earnings |  |  | 40 |  |  | - |  |  | (270)
Included in other comprehensive income |  |  | 21 |  |  | (796) |  |  | -
Purchases, issuances, sales, and settlements |  |  |  |  |  |  |  |  |
Purchases |  |  | - |  |  | 16,712 |  |  | -
Issuances |  |  | - |  |  | - |  |  | 1,257
Settlements |  |  | (912) |  |  | (23,881) |  |  | (532)
Ending balance December 31, 2017 |  | $ | 2,268 |  | $ | 14,261 |  | $ | 6,944
Schedule of quantitative information about level 3 fair value measurements | The following table and commentary presents quantitative and qualitative information about Level 3 fair value measurements as of December 31, 2018:
|  |  |  |  |  |  |  |  |  |  | Weighted
Measured at fair value |  |  |  |  |  |  | Unobservable |  |  |  | Average
on a recurring basis: |  | Fair Value |  | Valuation Methodology |  | Inputs |  | Range of Input |  | of Inputs
Mortgage servicing rights |  | $ | 7,357 |  | Discounted Cash Flow |  | Discount Rate |  | 10.0 - 229.7% |  | 10.2 | %
|  |  |  |  |  |  | Prepayment Speed |  | 7.0 - 68.9% |  | 9.6 | %
The following table and commentary presents quantitative and qualitative information about Level 3 fair value measurements as of December 31, 2017:
|  |  |  |  |  |  |  |  |  |  | Weighted
Measured at fair value |  |  |  |  |  |  | Unobservable |  |  |  | Average
on a recurring basis: |  | Fair Value |  | Valuation Methodology |  | Inputs |  | Range of Input |  | of Inputs
Mortgage servicing rights |  | $ | 6,944 |  | Discounted Cash Flow |  | Discount Rate |  | 10.0 - 34.3% |  | 10.2 | %
|  |  |  |  |  |  | Prepayment Speed |  | 7.0 - 68.4% |  | 9.6 | %
Schedule of assets measured at fair value on a nonrecurring basis | For assets measured at fair value on a nonrecurring basis at December 31, 2018, and December 31, 2017, the following tables provide the level of valuation assumptions used to determine each valuation and the carrying value of the related assets:
|  | December 31, 2018
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Impaired loans 1 |  | $ | - |  | $ | - |  | $ | 12,163 |  | $ | 12,163
Other real estate owned, net 2 |  |  | - |  |  | - |  |  | 7,175 |  |  | 7,175
Total |  | $ | - |  | $ | - |  | $ | 19,338 |  | $ | 19,338
| 1 |  | Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, had a carrying amount of $12.5 million and a valuation allowance of $352,000, resulting in an increase of specific allocations within the provision for loan and lease losses of $208,000 for the year ending December 31, 2018.
| 2 |  | OREO is measured at the lower of carrying or fair value less costs to sell, and had a net carrying amount of $7.2 million, which is made up of the outstanding balance of $16.1 million, net of a valuation allowance of $8.0 million and participations of $900,000, at December 31, 2018.
|  | December 31, 2017
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Impaired loans 1 |  | $ | - |  | $ | - |  | $ | 5,113 |  | $ | 5,113
Other real estate owned, net 2 |  |  | - |  |  | - |  |  | 8,371 |  |  | 8,371
Total |  | $ | - |  | $ | - |  | $ | 13,484 |  | $ | 13,484
| 1 |  | Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, had a carrying amount of $5.3 million and a valuation allowance of $144,000, resulting in an increase of specific allocations within the provision for loan and lease losses of $856,000 for the year ending December 31, 2017.
| 2 |  | OREO is measured at the lower of carrying or fair value less costs to sell, and had a net carrying amount of $8.4 million, which is made up of the outstanding balance of $17.4 million, net of a valuation allowance of $8.2 million and participations of $900,000, at December 31, 2017.

X
- Definition Tabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset or liability. + References No definition available. + Details
Name: | osbc_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock
Namespace Prefix: | osbc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration