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Acquisition (Tables) | 12 Months Ended
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Dec. 31, 2021
Acquisition |
Summary of acquisition | ​
​ | ​ | ​ | ​
West Suburban Acquisition Summary | ​ | ​ | ​
As of Date of Acquisition | ​ | ​ | ​
​ | ​ | December 1, 2021
Assets | ​ | ​ | ​
Cash and due from banks | ​ | $ | 16,794
Interest bearing deposits with financial institutions | ​ | ​ | 232,880
Securities available-for-sale and held-to maturity, at fair value | ​ | ​ | 1,066,373
FHLBC stock | ​ | ​ | 3,340
Loans | ​ | ​ | 1,502,118
Premises and equipment | ​ | ​ | 47,456
Other real estate owned | ​ | ​ | 5,552
Core deposit intangible | ​ | ​ | 14,772
Deferred tax assets | ​ | ​ | 2,093
Other assets | ​ | ​ | 52,710
Total assets | ​ | $ | 2,944,088
​ | ​ | ​ | ​
Liabilities | ​ | ​ | ​
Noninterest bearing demand | ​ | $ | 409,141
Savings, NOW and money market | ​ | ​ | 2,069,890
Time | ​ | ​ | 215,205
Total deposits | ​ | ​ | 2,694,236
Reserve for unfunded commitments | ​ | ​ | 1,787
Other liabilities | ​ | ​ | 20,629
Total liabilities | ​ | ​ | 2,716,652
​ | ​ | ​ | ​
Cash consideration paid | ​ | ​ | 100,679
Stock issued for acquisition | ​ | ​ | 194,484
Total Liabilities Assumed and Cash and Stock Consideration Paid for Acquisition | ​ | $ | 3,011,815
Goodwill | ​ | $ | 67,727
Schedule of Purchase price of loans at acquisition | ​
​ | ​ | ​ | ​
​ | ​ | As of
West Suburban Acquired PCD Loans | ​ | December 1, 2021
Par value of acquired loans | ​ | $ | 108,241
Allowance for credit losses | ​ | ​ | (12,075)
Non-credit discount | ​ | ​ | (1,723)
Purchase price of PCD loans at acquisition | ​ | $ | 94,443
Schedule of Unaudited Pro Forma | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Unaudited Pro Forma for the Years Ended
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2021 | ​ | 2020
Net interest income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 166,495 | ​ | $ | 165,283
Noninterest income | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 59,036 | ​ | ​ | 48,937
Net income attributable to Old Second Bancorp, Inc. | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 67,779 | ​ | ​ | 12,349

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Tabular disclosure of the reconciliation of contractual cash flows to the carrying amount relating to certain loans acquired in a transfer. + References No definition available. + Details
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- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
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